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How we know that Earth isn't flat
Astronomers have known that Earth is a globe for thousands of years
The story of SKYLAB
Fifty years on from its launch, Jane Green takes a look back at the troubles and triumphs of the USA's trailblazing space station
Darkness on the moors
In search of true darkness and skies that sparkle, Jamie Carter visits Yorkshire, home of the UK's newest International Dark Sky Reserves
How can we see the afterglow of th Big Bang?
Govert Schilling of cosmology's continues to explain some most confusing concepts
The riddle of the HYPERGIANTS
New research is uncovering the weird workings of the largest stars in the Universe
The riddle of the HYPERGIANTS
New research is uncovering the weird workings of the largest stars in the Universe
Capturing Milky Way THE MAGNIFICENT
Get ready for the return of late summer nights under the stars as Will Gater presents a beginners’ guide to photographing our ever-changing home Galaxy
Imaging with MULTI-BAND FILTERS
Over the last few years there has been an explosion of multi-band filters for astrophotographers.
FIELD OF VIEW
The very, very early Space Race
INSIDE THE SKY AT NIGHT
In just a generation, humanity has gone from knowing of a handful of planets - those in our Solar System - to confirming the existence of over 5,000.
Q&A WITH A BLACK HOLE PHYSICIST
The Event Horizon Telescope continues to test Einstein's general relativity predictions under the most extreme conditions
Speed up your workflow
Save time by automating common processing steps like boosting contrast and reducing noise
Experiments with Venus
Try out these activities while the Evening Star is shining bright in our skies
Build a Bahtinov mask
Make an astrophotography focusing aid to fit any telescope
Master the art of averted vision
If you're new to stargazing, a faint object like C/2022 E3 ZTF, the comet that had us all excited earlier this year, isn't the best target for a first look through a telescope - the chances are you won't see a thing.
The new Space Age
With 70 nations, space-mad billionaires and eager private companies all vying for a stake - but no laws or rules -space today is verging on a free-for-all.
Does the Universe have an edge?
It's one of the most perplexing questions in cosmology: does our Universe have an edge?
Mercury returns to twilight
The inner wanderer graces our evening skies once again this month.
JUICE TAKES FLIGHT
Set to launch this month, the European-led JUICE spacecraft will explore the frozen worlds orbiting the gas giant Jupiter.
Astronomy Photographer of the Year
Supported by Liberty Specialty Markets, The world-class competition returns in 2023, seeking the best astronomy image of the past year
O&A WITH A PLANETARY SCIENTIST
The materials that form the building blocks of life on Earth have been found in distant planet-forming discs that are the same size as the Solar System
ASTROPHOTOGRAPHY PROCESSING
Reduce star trailing in your astro images, An easy processing tip to remedy stretched and unsharp stars
Bring out the colours of stars
From reds to yellows to blues, here's how to reveal the subtle tones of stars in your images
Build a zero-magnification finder
Make an illuminated aiming device you can use on any telescope
The Columbia Space Shuttle disaster
Twenty years on, Amy Arthur looks back at fateful flight STS-107
The man who put the Sun at the CENTRE OF THE UNIVERSE
This month marks 550 years since the birth of Nicolaus Copernicus. Emily Winterburn explores his life and legacy
OBSERVING VARIABLE STARS
Pete Lawrence is your guide to viewing variable stars so you can record their changes in brightness
Expansion and gravity
Though the Universe is expanding, gravity helps keep it together
Does the Universe expand faster than light?
Govert Schilling continues to explain cosmology's confusing concepts In part 2 of our series
DEEP-SKY TOUR
We'll start in Orion's Sword where M42, the Orion Nebula, takes pride of place. Magnificent through any instrument, smaller scopes give a lovely overview of this fourth-magnitude nebula, easily revealing the bright kidney-shaped 'core' within which the tightly packed stars of the Trapezium Cluster are embedded.