OBSERVATORY LOG — ORIGINAL ASTRONOMY ART
Aphelion Prints EST. PERIHELION +180D

The Aphelion reference library

Where would you like to begin?

Explore the sky, make sense of a photograph, or find a piece of astronomy art. The complete reading directory is below.

More guides and references

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  • The observatory journal

    Start with a question about the sky, explore the objects beyond it, or find practical help choosing and printing your own artwork.

  • Astronomy print questions, answered.

    The questions people type into a search bar before they buy something for the wall: how big, framed or not, and whether any of these pictures are real.

Your own sky

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  • Personalised Star Maps: What They Show & How to Choose the Moment

    A personalised star map shows the real night sky over one place, on one date and time: the actual stars that stood above a birth, a wedding or a first meeting. Here's what one shows, why…

  • How to Turn a Photo Into a Painting

    The fastest way to turn a photo into a painting is to let software repaint it in a chosen art style: upload, pick a look, and preview it free before deciding whether to print. Here's…

  • Turn a Photo Into Wall Art: 4 Styles Compared

    There's more than one way to turn a photo into wall art. Here are four distinct styles, and the kind of photo each one flatters most.

  • How to Turn a Photo Into Line Art

    The quickest way to turn a photo into line art is to let software trace it into a single clean line: upload, pick the Line Art style, and preview it free before you print.

  • Photo to Canvas: The Complete Guide

    Turning a photo into a canvas print is simple once you know the sizes, the resolution you need, and what to look for. Here's the complete UK guide.

  • What is a star map print?

    A star map print shows the sky as it actually appeared above one location at one moment: a specific date, time and set of coordinates, plotted rather than illustrated.

  • Your own sky

    One particular night, or one particular photograph. What a star map shows, and what happens to a photo you upload.

Looking up

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  • What Is a Constellation? The 88 Patterns, Explained

    A constellation is a recognised pattern of stars: and, in the modern sense, a defined patch of sky around it. There are 88 official ones, set by the International Astronomical Union, and…

  • The 8 Phases of the Moon, Explained

    The Moon moves through eight phases in roughly 29.5 days: new, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, last quarter and waning crescent. Here's what each…

  • What Is a Nebula? The Main Types, Explained

    A nebula is a vast cloud of gas and dust in space: some are stellar nurseries, others the remains of dying stars. Here are the main types and the famous examples.

  • What Is the Pale Blue Dot?

    The Pale Blue Dot is a 1990 photograph of Earth taken by Voyager 1 from six billion kilometres away, our entire world reduced to a single point of light.

  • What causes the northern lights?

    An aurora is the sky glowing where the solar wind meets Earth's magnetic field. Here's what causes it, where to see one, and why the colours differ.

  • Planets in Order From the Sun

    Eight planets, one order: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. Here is the sequence with real figures from NASA's planet pages - and an honest look at what the…

  • Star Names and the Constellations

    The bright stars carry proper names - Betelgeuse, Rigel, Vega, Polaris - most of them arrived at through Arabic translations of much older Greek star catalogues, and all of them approved…

  • Are photos of nebulae real?

    The objects are real. The colours usually are not what your eye would see. Most nebula images map invisible wavelengths onto visible ones so the structure becomes legible.

  • How do people get pictures of galaxies?

    By collecting light for hours and adding it together. A galaxy image is dozens or hundreds of long exposures stacked into one frame, not a single photograph.

  • When were galaxy prints popular?

    The galaxy print you are thinking of (leggings, hoodies, bedding) was a clothing and bedding trend, and an early-2010s one in our reading. Deep-space imagery as wall art is a separate…

  • Looking up

    What the Moon is doing, what a nebula and a constellation actually are, and whether the pictures are real.

  • Every full moon has a name

    Thirteen full moons in 2026, twelve in 2027, each with its traditional name and the exact minute it is full in London. Dates from NASA, checked against the Royal Observatory.

  • Snow Moon: February’s full moon

    February’s full moon, full on Sunday 1 February 2026 at 10:09pm GMT. The name is folk history rather than astronomy, and the date is the part worth getting right.

  • Wolf Moon: January’s full moon

    January’s full moon, full on Saturday 3 January 2026 at 10:03am GMT. The name is folk history rather than astronomy, and the date is the part worth getting right.

  • Cold Moon: December’s full moon

    December’s full moon, full on Thursday 24 December 2026 at 1:28am GMT. The name is folk history rather than astronomy, and the date is the part worth getting right.

  • Sturgeon Moon: August’s full moon

    August’s full moon, full on Friday 28 August 2026 at 5:18am BST. The name is folk history rather than astronomy, and the date is the part worth getting right.

  • Beaver Moon: November’s full moon

    November’s full moon, full on Tuesday 24 November 2026 at 2:53pm GMT. The name is folk history rather than astronomy, and the date is the part worth getting right.

  • Worm Moon: March’s full moon

    March’s full moon, full on Tuesday 3 March 2026 at 11:38am GMT. The name is folk history rather than astronomy, and the date is the part worth getting right.

  • Hunter's Moon: October’s full moon

    October’s full moon, full on Monday 26 October 2026 at 4:12am GMT. The name is folk history rather than astronomy, and the date is the part worth getting right.

  • Buck Moon: July’s full moon

    July’s full moon, full on Wednesday 29 July 2026 at 3:36pm BST. The name is folk history rather than astronomy, and the date is the part worth getting right.

  • Pink Moon: April’s full moon

    April’s full moon, full on Thursday 2 April 2026 at 3:12am BST. The name is folk history rather than astronomy, and the date is the part worth getting right.

  • Strawberry Moon: June’s full moon

    June’s full moon, full on Tuesday 30 June 2026 at 12:57am BST. The name is folk history rather than astronomy, and the date is the part worth getting right.

  • Harvest Moon: September’s full moon

    September’s full moon, full on Saturday 26 September 2026 at 5:49pm BST. The name is folk history rather than astronomy, and the date is the part worth getting right.

  • Flower Moon: May’s full moon

    May’s full moon, full on Friday 1 May 2026 at 6:23pm BST. The name is folk history rather than astronomy, and the date is the part worth getting right.

  • Blue Moon: May’s full moon

    May’s full moon, full on Sunday 31 May 2026 at 9:45am BST. The name is folk history rather than astronomy, and the date is the part worth getting right.

On the wall

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  • Canvas vs Framed Print vs Poster: How to Choose

    Canvas, framed print or poster? Canvas is glare-free and made for big, atmospheric images; a framed print is crisp and ready to hang; a poster is the keenest on price. Here's how to…

  • What DPI Do You Need to Print a Photo?

    As a rule: aim for 300 DPI for a crisp print, accept down to 150 DPI for larger pieces, and avoid anything below that. Here's what those numbers mean for your photo.

  • A Beginner's Guide to Astronomy Art

    Astronomy art runs from photoreal nebulae to graphic retro posters. Knowing the main genres makes it far easier to choose prints that work together on a wall.

  • Moon Phase Prints, Honestly

    A moon phase print works because it is a sequence: new moon to full and back, a shape the eye can follow and the sky can confirm. That is also why the bad ones are easy to spot - the…

  • What is the perfect size for wall art?

    There is no single perfect size. The right one is set by the wall, not the picture. The common guidance is to fill roughly two-thirds to three-quarters of the available width.

  • What is the 2/3 rule for wall art?

    The 2/3 rule says a picture hung above a piece of furniture should be about two-thirds as wide as the furniture beneath it. It is a decorating rule of thumb, not a standard anyone enforces.

  • Can wall art be too big for a wall?

    Yes. A print is too big when there is no clear margin left around it, and the giveaway is that the room starts to feel smaller rather than more dramatic.

  • Does canvas look better framed or unframed?

    Neither is objectively better. Unframed canvas suits modern rooms and images that carry to the edge; a frame suits formal settings and gives the picture a defined boundary.

  • On the wall

    Size, finish and resolution. What a poster, a framed print and a canvas each do to the same picture.

The collection

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  • The Best Gifts for Astronomers & Space Lovers

    The best gift for an astronomer matches what they love about the sky. Here's a guide sorted by the kind of stargazer you're buying for.

  • Is galaxy print good for home decor?

    As wall art, yes. Galaxy imagery is mostly dark field with one bright focal point, which is exactly the composition that carries a large size without crowding a room.

  • What to gift someone who loves the moon?

    Choose by what they actually love about it: the object itself, the cycle of phases, or one particular night. Those are three different gifts and only one of them will land.

  • The collection

    Subject by subject: the Moon, the planets, galaxies, nebulae, blueprints and the retro travel posters.