Space
Pluto and the largest moon of Neptune might be siblings
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Bio
Jonathan O'Callaghan is a freelance science journalist based in London. He specialises in stories on astronomy, astrophysics and space exploration, and was awarded the Walter Sullivan Award for Excellence in Science Journalism by the American Geophysical Union in 2021.
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Space
The first stars in the universe could have formed surprisingly early
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We are about to hear echoes in the fabric of space for the first time
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Mystery of 'impossible' star resolved by three-body solution
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Dozens of stars show signs of hosting advanced alien civilisations
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Asteroid that broke up over Berlin was fastest-spinning one ever seen
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Mars may have captured and split a comet to create its two moons
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Early galaxy seen by JWST contains giant young stars and supernovae
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Sleeping black hole is way more massive than it should be
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JWST will officially begin searching for exomoons around other planets
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Habitable ocean world K2-18b may actually be inhospitable gas planet
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Why we're finally on the cusp of finding exomoons around other planets
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