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Seeing Green Northern Lights

15/3/2022

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The image below was taken on a September night at the Loch Shiel jetty in Acharacle when I had a client with me for some night photography tuition. We had been photographing the Milky Way in the sky over Loch Sunart when the Aurora Alerts went off, so we decided to head over to the jetty as it has a clear view north. We had a great time photographing the Northern Lights both here and at other locations close by. Some of the images from that night hang in my Studio at Resipole and they often prompt people to ask; “Can you see the Northern Lights here and are they really that green?”. My answer is always yes, but we can only perceive the aurora as a greyish-blue light. I then go on to explain the reason why...
Photographing Northern Lights, Aurora Borealis over Loch Shiel at Acharacle | Ardnamurchan, Scotland | Steven Marshall Photography
A client during his night photography lesson under the Northern Lights on the Loch Shiel Jetty at Acharacle
It’s all because our eyes contain two types of photoreceptors (cones and rods) and how they work in the dark compared to how they work in daylight.
 
Each retina has about 6 to 7 million cones and they provide the eye with the ability to distinguish colour. However, these cones only work effectively when it is light. On the other hand, there are about 120 million rods. These are far more effective at helping us to see in low light and near dark conditions, but they cannot distinguish colour.
 
So, as it gets dark and the cones stop working, our eyes move from enabling us to see in full colour to only seeing in black and white. This means that anything we look at in the dark, including the Northern Lights, will only be seen in black, white and shades of grey.
 
However, the sensors that you find in digital cameras do not suffer from this limitation and are extremely effective at picking up both light and colour in the dark. They can easily pick up the greens, reds, blues and purples that are present in the aurora, meaning that the colours you see in digitally taken images of the aurora are not a result of any photo editing but are, in fact, real.
 
The auroral colours are a result of collisions between gaseous particles in the Earth's atmosphere and charged particles released from the Sun's atmosphere. The colours present in the aurora depend on the type of gas particles the charged solar particles collide with. Green is the most common because most solar particles collide with our atmosphere at an altitude of around 60 to 150 miles, where there are high concentrations of oxygen and these collisions with oxygen produce a pale yellowish-green colour.
 
Blue and purple can also be present, but far less frequently than green because they only appear when solar activity is strong enough to cause particle collisions in our atmosphere at an altitude of 60 miles or less. At these heights, it is a reaction with nitrogen that causes the aurora to be tinged with purple or blue.
 
On rare occasions, red can be present in the aurora, but only when the Sun’s activity causes solar particles to react with oxygen at altitudes above 150 miles or so. At this height the oxygen is less concentrated and is “excited” at a higher frequency or wavelength than the denser oxygen lower down in the atmosphere and so produces a purely red aurora.
 
To give you an idea of the difference between what we can see and what the camera sees, I’ve prepared two versions of another image taken that night, but at Castle Tioram rather than Loch Shiel. These two versions are below, with the one on the left showing what the camera saw and the one on the right showing what I saw when I was taking the photograph. 
Northern Lights or Aurora Borealis over Castle Tioram | Ardnamurchan, Scotland | Steven Marshall Photography
What the camera saw
Northern Lights or Aurora Borealis over Castle Tioram | Ardnamurchan, Scotland | Steven Marshall Photography
What I saw
Don’t despair though, as but there is a way you can experience the colours for yourself. Many modern phone cameras have a “Night Mode” setting that allows you to take bright, sharp and noise-free photos, even in the darkness of the night. So, the next time you hear of the aurora happening, head to a place with a clear view of the northern horizon, put you phone camera in “Night Mode” and use it to help you see the colours of the ‘Na Fir-chlis’.
You will find a few more images of the Northern Lights in the “Our Night Sky”  photo gallery on this website and if you’d like to arrange some night photography tuition, please feel free to get in touch.
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Our Night Sky: November 2021

1/11/2021

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​The clocks have changed and the sun now sets at around 4:00 pm to give us long dark nights for stargazing.  The Summer Triangle, which we have been using for navigation is disappearing from view, but the Great Square of Pegasus is now in the southern sky for us instead to find the constellations that lie around it, many of which have names with watery connections. Many of the planets are visible to the naked eye, with Venus shining particularly bright because it reached its furthest point from the Sun on 29 October. Finally, you may be able to spot shooting stars produced as a steady stream from the Taurid meteor showers in the first part of the month, while there is also the possibility of spotting some from the Leonids meteor shower which peaks on the morning of November 17.
Northern lights over Loch Shiel at Acharacle | Stargazing Ardnamurchan Scotland| Steven Marshall Photography
Jetty Lights - Loch Shiel Jetty, Acharacle, Ardnamurchan
On a late November evening, the glow of distant Northern Lights in the sky, beneath The Plough and well beyond the hills of Moidart casts shades of green on the waters of Loch Shiel.

The Constellations

Following the clock change at end of October, the sun now sets at around 4:00 pm, meaning that the stars and constellations start to become visible from about 17:30 pm onwards. During the previous three months we have been watching the Milky Way get lower and lower in the southern night sky and you may have noticed the constellations in the south getting dimmer. This is because the position of the Earth is now such that we are looking out of the plane of our galaxy and into the rest of the universe. However, the Milky Way has not gone altogether, and you can see it over in the west along with the Summer Triangle of the three bright stars of Vega, Altair and Deneb, which we have been using to navigate our way around the night sky in previous months.
If you look high up to in the southern sky, you’ll find the Square of Pegasus. It is a large asterism, made up of 4 stars of nearly equal brightness in a large square pattern and you can now use to find your way around the night sky. Its stars are Scheat, Alpheratz, Markab and Algenib and you will need to look carefully to find them as they are all of second magnitude, so they aren’t the brightest. 
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The Constellation of Pegasus Image Credit: Till Credner Own work: AlltheSky.com, CC BY-SA 3.0
​The constellation of Pegasus represents the Flying Horse of Greek mythology and the Square marks the horse’s body. You may find it difficult to make out the horse because it is upside down and the constellation represents only the top half of its body and its head. However, you may be able to pick out Enif, the constellation’s brightest star which is below and to the right of the Square and Altair. Enif is an orange supergiant star that is 5,000 times brighter than the Sun and it represents the horse’s nose.

If you follow the diagonal down from the top left of the Square to beyond its bottom right star, you’ll come to a faint group of stars known as the Water Jar of Aquarius. It is an asterism formed by four relatively bright stars in the constellation of Aquarius (the Water-Carrier). It is easily recognised by its arrow shape, which looks a bit like a fighter plane with swept wings.  Though it’s not the brightest part of Aquarius, it’s a good pattern that helps you to find its other stars.
SEO: November southern night sky | Stargazing Ardnamurchan | Steven Marshall Photography
Southern Night Sky - November 2021
Created using SkyPortal Mobile App
November northern night sky | Stargazing Ardnamurchan | Steven Marshall Photography
Northern Night Sky - November 2021
Created using SkyPortal Mobile App
From the top left edge of the Square stretches a line of stars in the constellation of Andromeda, which is named after Andromeda, daughter of Cassiopeia, in the Greek myth, who was chained to a rock to be eaten by the sea monster Cetus. It is the home of the Andromeda Galaxy which, at approximately 2.5 million light-years from Earth, is the nearest spiral galaxy to our own galaxy, the Milky Way. It is also the most distant object that you are likely to see without an optical aid but if you can’t find it with the naked eye, then use binoculars through and look for a little oval blur.
 
Below Andromeda and to the left of Pegasus is where you will find the constellation of Pisces (the Fishes). It is very faint and difficult to see, so the best way to find it is to look directly below the Square of Pegasus for the Circlet of Pisces, which is a pentagonal asterism of 5 stars that marks the head of the Western Fish. Once you’ve found the it, go on from there to catch the Eastern Fish that’s jumping upward to the east of the Square of Pegasus. The entire constellation looks like the letter V.
 
Below Pisces is the constellation of Cetus, the Sea Monster which in Greek mythology both Perseus and Heracles needed to slay. You’ll find its tail marked by a fairly bright star called Diphda located low down in the sky, almost directly below the left-hand edge of the Square of Pegasus, while further over to the left and up a little, you’ll find Menkar, a reasonably bright star that marks its head.
 
You may have noticed that all the constellations in this part of the sky have watery connections. It is said that this is because the Sun travelled through these constellations during the wet season in ancient Mesopotamia, which was from November to March, and flooding was a major problem. Many of our constellations date from that location and time.
 
Finally, to the east of the Square is Aries, the Ram, whose three main stars form an easily recognised triangle, and another more regular triangle, actually called Tringulum, the Triangle, which contains the nearby galaxy M33. This will be visible with binoculars if you have a reasonably dark sky.
 
If you look north, you’ll see the same stars as you would in any other month, except that their orientation varies. This month the familiar Plough asterism, which many people will recognise, is low down in the north at the moment with its rectangular end almost directly below Polaris, the Pole Star. If you look over to the north-east you can see Capella. It is a yellow giant star, the brightest star in the constellation of Auriga (the Charioteer), the sixth-brightest star in the night sky, and the third-brightest in the northern celestial hemisphere after Arcturus and Vega.

The Moon

At the very start of the month, we are close to a new Moon (no Moon) as this occurs on 4 November and if it’s clear a couple of nights later, on 6 November, you will find the slightest of crescent Moons setting in the south west at around 4:30 pm. However, it may be difficult to see the Moon on that evening as it will be lying close to where the sun has set. You'll probably find it easier to see it on the following evenings of 7 November and 8 November as it will have moved slightly to the left and will be sitting further from the sun. It will also be next to a bright shining Venus on these two evenings.

​The first quarter Moon (a half moon) is on 11 November, and it will be sitting beneath Jupiter, low down on the southern horizon.
This month’s full Moon is on 19 November, becoming 100% full just before 9 am in the morning and meaning that it will appear full on both the night of 18-19 November and 19-20 November. It will rise just before 4:00 pm on the 18 November and just after 4:00 pm on 19 November, when it will be close to the Pleiades (The Seven Sisters). 
Moon Phases November 2021 | Ardnamurchan Stargazing | Steven Marshall Photography
There is a partial eclipse of the Moon on 19 November, but it takes place just before sunrise, when the Moon will be low down in the north-west. This means that will need to be quite far west and north in the UK to see anything of it. If you are, then you may see the dark part of the Earth’s shadow starting to move onto the Moon at 7:18 am.
 
This month’s full Moon is called the Beaver Moon and there is disagreement over the origin this name. Some say it comes from Native Americans setting beaver traps during this month, while others say the name comes from the heavy activity of beavers building their winter dams. It is also known as the Frosty Moon, and along with the December Full Moon some called it the Oak Moon. Traditionally, if the Beaver Moon is the last Full Moon before the winter solstice, it is also called the Mourning Moon.

​The Planets

When it is getting dark, you may be able to spot Venus hanging low down on the western horizon just before it sets at around 5:30pm. It is shining brightly because it reached Elongation, its furthest point from the Sun, on 29 October and will take a few weeks to move away and become less bright as it does so.
 
Well to the left of Venus, in the south, you will find Jupiter, a gas giant that is the fifth planet from the Sun and the largest our Solar System. It is the second brightest planet in our night sky at the moment and to the right of it is a fainter Saturn. Saturn, another gas giant, is the sixth planet from the Sun and the second-largest in our Solar System. Saturn sets in the south west at around 9:30 pm and Jupiter at about 11:00 pm. If you use binoculars or a telescope you will be able to see Jupiter’s four bright moons and Saturn’s rings.
 
Neptune will be above the horizon until about 1:30 am and you will find it to the left of Jupiter in Aquarius. However, it will be very dim and therefore difficult to see, even with binoculars or a telescope. Its near twin in size, Uranus, can be found above the horizon all night long, over to the east in Aries. It reaches opposition on 5 November, when it will be at its closest to Earth this year at 1,742 million miles away. Even so, it is only just visible to the naked eye and will be difficult to distinguish from the stars. It will be better to look for it with binoculars night after night and spot it moving against the background of stars.
 
Last month was the best month of the year to see Mercury because it reached its maximum separation (elongation) from the Sun on 25 October, so in the first part of this month you will still be able to see it in the south-east sky just before sunrise.
 
Mars is too close to the Sun to be visible this month.

Meteor Showers 

​During the first part of the month there South or North Taurid meteor showers, which unlike other meteor showers, don’t have strong peaks but instead have “staying power” and produce a steady stream of meteors over a number of weeks. The South Taurids are active from about September 10 to November 20, while the North Taurids are active from about October 20 to December 10. They both produce a steady stream of about 5 meteors/hour and because they overlap up until the 20 November, you can expect to see up to 10 meteors/hour during the first 3 weeks of the month. However, the best time to look for them will be at the start of the month, a few days either side of the new Moon on 4 November when there will be little or no moonlight to drown them out.
 
We also have the Leonid meteor shower this month and it is known for periodic storms of historic proportions, when shooting stars fall like rain. While no storm is predicted for the 2021 Leonids, you can still catch plenty of meteors between 6 November and 30 November. The meteor shower peaks the morning of November 17 but unfortunately, this is two days before a full moon, meaning that the Moon will hang around for most the night, brightening the sky and washing out many of the meteors. However, as the Leonid meteors can appear in huge numbers, do keep an eye out for them from about 10:30 pm, which is when the radiant point rises above the horizon. You never know, you might spot some.
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Equinox Sunsets and Aurora

14/9/2021

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Depending on your point of view, Autumn either starts on 1 September (meteorological autumn) or on the 23 September (astronomical autumn). The latter is when the Autumnal Equinox takes place and is when day and night are of equal length and when the Sun rises due east and sets due west. Although this means that the dark nights return, it does mark the beginning of the beautiful sunsets over Loch Sunart that we get here at Resipole during the autumn and winter months and also increased chances of seeing the Aurora Borealis.
An autumn sunset on Loch Sunart | Resipole Scotland | Steven Marshall Photography
Image 1: Sunart Sundown - Loch Sunart, Resipole, Sunart
Most people know that the Sun rises in the east and sets in the west, but they may not realise that this is quite a generalisation. In fact, the Sun only rises due east and only sets due west on two days of the year; the days of the Spring Equinox and the Autumnal Equinox which, for 2021, are March 20 and September 22. To illustrate this, Figures 1 and 2 show the location of the rising and setting sun at the Spring Equinox and Autumnal Equinox, respectively.
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Figure 1: Location of rising and setting sun at the Spring Equinox - Loch Sunart, Resipole, Sunart
Created using The Photographer’s Ephemeris Mobile App
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Figure 2: Location of rising and setting sun at the Autumnal Equinox - Loch Sunart, Resipole, Sunart
Created using The Photographer’s Ephemeris Mobile App
​Once it has risen due east and set due west at the Autumnal Equinox (Figure 2), the Sun rises and sets a tiny bit further south each day until the Winter Solstice, the day on which it rises as far to the southeast as it ever does and sets as far to the southwest as it ever does (See Figure 4). It then changes direction and begins moving north each day, eventually rising due east and setting due west on the Spring Equinox (Figure 1) before continuing northwards until the Summer Solstice, when it rises as far to the northeast as it ever does and sets as far to the northwest as it ever does (Figure 3).
​Once it has risen due east and set due west at the Autumnal Equinox (Figure 2), the Sun rises and sets a tiny bit further south each day until the Winter Solstice, the day on which it rises as far to the southeast as it ever does and sets as far to the southwest as it ever does (See Figure 4). It then changes direction and begins moving north each day, eventually rising due east and setting due west on the Spring Equinox (Figure 1) before continuing northwards until the Summer Solstice, when it rises as far to the northeast as it ever does and sets as far to the northwest as it ever does (Figure 3).
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Figure 3: Location of rising and setting sun at the Summer Solstice - Loch Sunart, Resipole, Sunart
Created using The Photographer’s Ephemeris Mobile App
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Figure 4: Location of rising and setting sun at the Winter Solstice - Loch Sunart, Resipole, Sunart
Created using The Photographer’s Ephemeris Mobile App
​Image 1, at the top of this blog, was taken at Resipole during sunset on the day after the Autumnal Equinox of 2019, with the camera facing southwest down Loch Sunart towards the Isle of Carna and the hills of Morvern.  If you look closely, you can see a patch of intense colour behind the wooded hillside on the right-hand side of the image. This was the spot where the sun was setting due west and for me, such a sight is one of the most welcome of the year because it marks the return of spectacular sunsets to this part of the Loch.

​With the passing of the autumn months and the movement of the setting sun towards the south, these sunsets become more and more intense. They are something that I’ll never tire of photographing even though I have taken countless photos of them from this spot. I can honestly say that I’ve never seen the same mix of colours twice. Each sunset is different because of the varying position of the sun and the infinite range of possible cloud formations that reflect the light from the sun and produce the kaleidoscope of colours.
 
The Autumnal Equinox also paves the way for increased chances to see aurora borealis displays. According to NASA, the equinoxes are prime time for Northern Lights, because the geomagnetic activity that causes them is more likely to take place in the spring and autumn than in the summer or winter. In addition, we tend to have more clear nights in spring and autumn so this, combined with more geomagnetic activity, may be the reason why I tend to have captured most of my Northern Light images in September/October and March/April. 
Northern Lights over Loch Shiel | Acharacle, Ardnamurchan Scotland | Steven Marshall Photography
Image 2: Night School - Loch Shiel Jetty, Acharacle, Ardnamurchan
Image 2 above was taken 4 days after the Autumnal Equinox of 2019, when I had a client out with me for some night photography tuition. We had spent the first part of the night preparing for and taking photographs of the Milky Way rising above Loch Sunart and while we were doing this a very high Aurora Alert came through on my phone. We quickly packed up our camera gear and headed up to Acharacle and set it up again on the jetty there is on Loch Shiel. It is a perfect spot to look for and photograph the Aurora Borealis because it faces directly towards northern horizon that has only a few distant and low-lying hills on it, meaning that the view north is clear of any obstructions. We had a very productive time there and also at another couple of locations nearby and came away with some great shots of the “Merry Dancers”.
​
Finally, although the equinox referred to as a day by many people, it is actually the exact moment in time when the tilt of the Earth’s axis and Earth’s orbit around the sun combine in such a way that the axis is inclined neither away from nor toward the sun. For 2021, the Autumnal Equinox will be at 8:21 pm on Wednesday 22 September and the Spring Equinox was at 9:37 am on Saturday 20 March.
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Our Night Sky: September 2021

1/9/2021

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Depending on your point of view, Autumn either starts on 1 September (meteorological autumn) or the 22 September (astronomical autumn). The latter is when the Autumnal Equinox takes place and when the sun is directly above the earth’s equator. On that date, day and night are of equal length and the Sun rises due east and sets due west. With this, the dark nights return and, because it doesn’t get too cold outside, September is a great month for stargazing. According to NASA, the Equinox is a prime time for Northern Lights so, if you want to catch a glimpse of them, do keep an eye out for “aurora alerts” on social media.
Northern Lights over Castle Tioram | Stargazing Ardnamurchan | Steven Marshall Photography
Tioram Light Show - Castle Tioram, Doirlinn, Moidart
This image of an amazing show of the Northern Lights over Castle Tioram was taken on a clear and starry night a few days after the Autumnal Equinox of 2019

The Constellations

​This month the sun sets around 8:00 pm and the stars and the constellations become visible from about 9:00 pm onwards. As with July and August, the best way to navigate your way around the night sky is to use the Summer Triangle, which is made up of the three bright stars of Vega, Altair and Deneb. Start off by finding Vega, a really bright white star, which will be directly overhead. Next is Altair, which you will find halfway between Vega and the southern horizon. Finally, there is Deneb, which will be almost directly above Altair and across from Vega.
 
Once you have found the Summer Triangle, you can start to look for some of the constellations in the southern sky. Start off with Vega, the constellation of Lyra’s (the Lyre) brightest star. Below it, you will see the constellation’s 4 other main stars. These form a small parallelogram and make up the body of the Lyre – the sky’s only musical instrument.  
Next, look at Deneb, which marks the top of the Northern Cross, or the constellation of Cygnus (the Swan), which flies down the Milky Way with its wings outstretched. Deneb marks the tail of the Swan and Albireo, a fairly faint star at the bottom of the constellation, marks its head. If you have a telescope, or even powerful binoculars, take a look at Albireo and you’ll see that it’s a double star of contrasting colours. Typically, people see them as yellow and blue, or more accurately yellowish and bluish.

​Finally, looking at Altair, which you will find the constellation of Aquila (the Eagle) because Altair is its brightest star. Altair also has outstretched wings, though they are not as obvious at the wings of Cygnus. In between these two flying birds is the constellation of Sagitta (the Arrow), a dim but distinctive shape which is reasonably easy to pick out. Another small but easily seen constellation called Delphinus (the Dolphin) is nearby and it also looks like what it’s meant to be. 

The Constellation of Cygnus
The Constellation of Cassiopeia
Image Credit: Till Credner [CC Share Alike 3]
​The two better-known constellations of Capricornus and Aquarius are below Delphinus in the lower part of the sky. They are well known because they are in the Zodiac, the path of the planets but, as they have no very bright stars, you might not be able to pick them out.  Capricornus is the Water-Goat and Aquarius is a human, the Water-Carrier.
September southern night sky | Stargazing Ardnamurchan | Steven Marshall Photography
Southern Night Sky - September 2021
Created using SkyPortal Mobile App
September northern night sky | Stargazing Ardnamurchan | Steven Marshall Photography
Northern Night Sky - September 2021
Created using SkyPortal Mobile App
​As with August, September is a good month to view the Milky Way. If you trace a line down from Deneb and through Altair, you should be able to make out the Milky Way’s cloudy core to the right of Jupiter and Saturn, which you’ll find shining bright just above the southern horizon. The cloudy core will be visible up until about 10:00 pm. When you look at the Milky Way, you’ll notice a black band running down it’s middle, between the stars. William Herschel, the first astronomer to map our Galaxy, thought that this was a hole in space, but it is actually a dark swathe of sooty dust, known as the Great Rift in Cygnus which runs along the disc of our Galaxy.
 
If you look north, you’ll see the same stars as you would in any other month, but their orientation varies from month to month. By September the familiar Plough asterism, which many people recognise, is down over to the north-west. Follow its two right-hand stars upward, veer a little bit to the right and you’ll find Polaris, the Pole Star. If you look over to the north-east you can see Capella. Contrast its colour with that of Vega which is virtually overhead at this time of year. Capella is a yellow giant star, while Vega is a slightly bluer star than the Sun. The contrast is obvious if you look from one to the other.

The Moon

​At the very start of the month, we just miss the last quarter Moon as it was on 30 August, while there is a new Moon (no Moon) on 7 September. So, if it’s clear on the evening of 9 September, you will find the slightest of crescent Moons setting in the west at around 8:00 pm with a bright Venus to its left. However, it may be difficult to see the moon on 9 September as it will be lying close to where the sun has set. You'll probably find it easier to see it on the following evening, 10 September, as it will have moved slightly to the left and will be sitting further from the sun and to the left of Venus. 
The first quarter Moon (a half moon) is on 13 September and on 16 September it will be sitting just below Saturn. On 17 September, you will find the moon below and to the right of Jupiter, while on 18 September it will be below and to the left of this gas giant, the largest planet in our Solar System.
Moon Phases September 2021 | Ardnamurchan Stargazing | Steven Marshall Photography
​This month's full moon is on the night of 20-21 September, becoming 100% full at just before 1 am on the morning of 21 September. It will rise over in the east at around 8:00 pm, with Jupiter well over to its right. On the night of 25-26 September, you will find the moon passing beneath and close to the Pleiades (The Seven Sisters), one the closest open star clusters to Earth.  September’s full moon is called the Corn Moon because this is when crops are gathered at the end of the summer season. At this time of year, the Moon appears particularly bright and rises early, thus letting farmers continue harvesting into the night. This moon is also sometimes named the barley moon, and it is often the nearest full moon to the autumnal equinox, earning it the title of 'harvest moon'.

​The Planets

When it is getting dark, you may be able to spot Venus hanging low down on the western horizon just before it sets at around 8:30 pm.  You may also catch Mercury, the smallest and innermost planet in our Solar System because it reaches maximum separation from the Sun on 14 September.
 
However, if you are looking for planets, you will have more success when looking to the south-east at dusk because two of our Solar System’s gas giants, Jupiter and Saturn will rise from there at about 7:30 pm.  Jupiter is the brighter of the two planets and will be sitting to the left of Saturn. Jupiter sets at around 4:00 am, while Saturn sinks below the horizon at about 2:30 am.
 
If look at Jupiter through binoculars, you’ll see its four largest moons. They are Io, Europa, Ganymede, and Callisto and are known as the Galilean moons. With a telescope, you’ll also be able to see the dark belts of Jupiter crossing its disc, and maybe, if you are lucky, the storm known as the Great Red Spot. If your binoculars or telescope magnify by about 40 or 50 times, you be able to see Saturn’s famous rings and its biggest moons when you look at it. The largest, Titan, is enormous. In fact, it’s 40% more massive than the planet Mercury and 80% more massive than our own moon.
 
Neptune will be above the horizon all night long and you will find it to the left of Jupiter in Aquarius. It will be at its closest to Earth on 14 September, but it is our Solar System’s most distant planet, so "close" actually means 2,688 million miles away. Also, it is not particularly bright, so you will need binoculars or a telescope to see it. Its near twin in size, Uranus, can be found further over to the east in Aries and will be just visible to the naked eye, although you’ll have a better chance of seeing it if you use binoculars or a telescope.
 
Mars is too close to the Sun to be visible this month.

Meteor Showers

The annual Perseid Meteor Shower put on a good show last month and those of you who were lucky enough to have clear skies around its peak on the night of 12-13 August will have seen them shooting across the sky. However, September is not a good month for meteor showers, so we will have to wait until October for the chance to see some more. The Draconis will peak on the night of 8-9 October and the Orionids on the night of 20-21 October.

Autumnal Equinox

The Autumnal Equinox is when night and day are nearly exactly the same length (12 hours). It also marks the start of astronomical autumn and when the nights start to become longer than the days. Although the autumnal equinox referred to as a day by many people, it is actually the exact moment in time when the tilt of the Earth’s axis and Earth’s orbit around the sun combine in such a way that the axis is inclined neither away from nor toward the sun. For 2021, this will be at 8:21 pm on Wednesday 22 September.
 
The Autumnal Equinox also paves the way for increased chances to see aurora borealis displays. According to NASA, the equinoxes are prime time for Northern Lights, because the geomagnetic activity that causes them is more likely to take place in the spring and autumn than in the summer or winter. In addition, we tend to have more clear nights in spring and autumn so this, combined with more geomagnetic activity, may be the reason why I tend to have captured most of my Northern Light images in September/October and March/April. Finally, if you do want to catch a glimpse of the “Merry Dancers”, be sure to keep an eye out for “aurora alerts” on the web and on social media. Good sources for forecast and alerts are AuroraWatch UK, Glendale Skye Auroras and Aurora Research Scotland.
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    Hi, I’m Steven Marshall, a Scottish landscape photographer based at Rockpool House in the heart of the beautiful West Highland Peninsulas of Sunart, Morvern, Moidart, Ardgour and Ardnamurchan. Get in touch for photography tuition, tours and print sales.

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