This image presents a view of the Sun infrequently seen. It reminds me of images viewed through a microscope rather than a telescope. Taking something as huge as our star and presenting it in such fine detail as if observed under the microscope is a real feat of photography.

Oana Sandu, Community Coordinator and Communication Strategy Officer at the European Southern Observatory (ESO)

The use of a different colour palette to our expectations gives us an alternative way to think about the Sun.

Alan Sparrow, Chair of the UK Picture Editors’ Guild and Director of the UK Picture Editors’ Guild Awards

Cloud cover doesn’t always scupper astronomy. It can complement and frame the sense of awe so long as it keeps in the right place, as captured here.

Jon Culshaw, comedian, impersonator and regular guest on The Sky at Night

Talk about a ’decisive moment!’ Vast yet intimate, breathtaking and touching all in one beautiful image.

Rebecca Roth, Image Coordinator and Social Media Specialist at NASA’s Goddard Space Flight Center

I love the story of how Floyd the dog was persuaded to be a part of this fantastic image.

Alan Sparrow, Chair of the UK Picture Editors’ Guild and Director of the UK Picture Editors’ Guild Awards

Timing is everything. There is no better example of that than this image. However, even the best timing needs an expert eye to make the most of it. The perfect execution of capturing and processing here makes me feel as if I’m standing on the ground witnessing this incredible event.

Steve Marsh, Art Editor for BBC Sky at Night Magazine

Looking rather like a special effect from some imaginary spacecraft in a science-fiction story, this image shows hot exhaust from a launching rocket making contact with colder air. Though the initial plume is thin, the changes in atmospheric conditions as the rocket climbs cause the exhaust to surge dramatically outwards, creating the ‘petals’ of the flower. Under the right conditions, minute ice crystals form, reflecting and scattering light from over the horizon, injecting colour into the scene (including rainbow effects). The apparent stillness of the natural landscape and the man-made activity overhead contrast wonderfully, and are dramatically framed.

Edward Bloomer, Planetarium Astronomer at the Royal Observatory Greenwich

This is a popular deep-sky target imaged to an intensely detailed degree. The bright halo around M31 really shines here. This is not easy to capture without bleaching out detail in the brighter parts of the main galaxy, but the photographer has managed to display fine dust lanes spiralling all the way into a beautifully balanced galactic core.

Steve Marsh, Art Editor for BBC Sky at Night Magazine

I was immediately struck by the surrealist quality of this image. There is a calmness about the scene but also a great strength in the twisted form of the dead tree reaching out, both towards the Milky Way and the falling meteor, making a powerful connection between the Earth, near sky and deep sky. The tonal quality and range emphasize the detail, which I can easily lose myself in for quite some time.

Mandy Bailey, Astronomy Secretary for the Royal Astronomy Society

From the movement of the trees to the streak of the meteor, there is symmetry and drama in this shot that feels like it was always there. The decision to de-saturate the image gives it an ageless feel.

Steve Marsh, Art Editor for BBC Sky at Night Magazine

Night-time mist, ancient ruins, ethereal light and the quiet expression of the human presence all make this contemplative scene remind me of the romantic landscapes of the German painter Caspar David Friedrich.

Melanie Vandenbrouck, Curator of Art at Royal Museums Greenwich

It takes control to present monochrome images of such colourful objects such as this one. Even more control to produce one as perfectly processed as this of an object notorious for its imaging difficulty.

Steve Marsh, Art Editor for BBC Sky at Night Magazine

The range, balance and framing of this composition are already incredible, yet some intangible ingredient further elevates this image to dizzying heights of surreal beauty. The essence of exploration, from the terrestrial shore to the cosmic shore, with beacons of light both grounded and celestial, is utterly spellbinding.

Tom Kerss, Astronomer at the Royal Observatory Greenwich

This is simply exquisite! I love the pastel aquamarine and rosy hues, the delicate wisps of gas and dust, the finely drawn features of the nebula.

Melanie Vandenbrouck, Curator of Art at Royal Museums Greenwich

The choice of palette and attention to colour balance lend a fairy-tale quality to this image. Pools of light are perfectly balanced, inviting the eye to explore the abstract sculptural beauty of the nebulae. A superb result.

Tom Kerss, Public Astronomy Officer at the Royal Observatory Greenwich

An image of swathes of the universe under construction conveying a grace and beauty at vast distance, which contrasts with the cataclysms and ‘late heavy bombardments’ which are likely taking place at the heart of it.

Jon Culshaw, comedian, impersonator and regular guest on The Sky at Night

I commend the creative and artistic choices made by the photographer in both the colour palette and the highlighting of the prominence with an enhanced atmospheric layer. The final image is spectacular. 

Ed Robinson, Award-winning photographer, creative director, visual consultant and founder of OneRedEye Visual Communications

This is a fascinatingly unusual image in its texture and patterns, like endless backlit smoke rings in the corner of a celestial jazz bar. 

Jon Culshaw, comedian, impersonator and regular guest on The Sky at Night

This is an incredible portrait of the Sun’s untameable fury – a maelstrom of seething plasma we so seldom consider as we bask in its warm rays on a peaceful day.

Tom Kerss, Public Astronomy Officer at the Royal Observatory Greenwich

I’ve loved the monochrome images in this year’s competition and this view of Saturn is no exception. Capturing an image using a methane filter to reveal this type of detail is technically challenging. It gives us a very different view of Saturn and one I found fascinating to explore, wondering what caused the methane to form into such bands.

Mandy Bailey, Astronomy Secretary for the Royal Astronomical Society

I love the detail in the foreground. It puts a perspective on the aurora and gives a scale to this phenomenon.

Alan Sparrow, Chair of the UK Picture Editors’ Guild and Director of the UK Picture Editors’ Guild Awards

If an image is worth a thousand words, this one definitely encompasses that. The amount of elements to explore in this frame is impressive. Even more impressive is the way the elements come together in a balanced composition: the Milky Way arch above intersects with the aurora and the human presence points towards the landscape below, which puts up a light show of its own. I especially liked spotting the footprints in the snow.

Oana Sandu, Community Coordinator and Communication Strategy Officer at the European Southern Observatory