Science
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Trapped layer of cold air keeps water frozen in 50-mile-wide impact crater
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Provisionally named 2018 VG18, it is 120 times further away from the sun than Earth is
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SpaceX said it was standing down to further evaluate an ‘out of family’ reading on the rocket’s first-stage sensors -
On 1 January 2019 the New Horizons probe will begin transmitting data from Ultima Thule, 4bn miles from Earth in the Kuiper belt. What will it find? -
The smallest planet can be seen before sunrise this week together with the largest and the brightest
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Emails released to Guardian show staff considered questioning 2009 greenhouse gases finding after White House denied administrator’s ‘red team, blue team’ idea -
Scientists can now quickly determine a chick’s gender before it hatches, potentially ending the need to cull billions of male chicks worldwide -
Key issues
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The physicist’s former research student recalls their close relationship at Cambridge, the sheer might of his intellect, and how he once bored the great man to sleep
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At the COP24 conference, leaders lack the urgency felt by communities on the frontlines of a global threat -
From the response to Windrush to scientific breakthroughs, we need to remind ourselves what we are capable of, says Guardian columnist Jonathan Freedland
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The solutions to today’s quiz and puzzle -
Test your knowledge of Tweet-speak, plus a social media maths puzzle -
The solution to today’s puzzle -
The skins they live in
Multimedia
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Prof Dame Jane Francis knows Antarctica better than most: she’s spent the majority of her career researching this icy landscape. Ian Sample talks to her about what it’s like to camp in Antarctica and what her findings can tell us about our future on this planet -
Nasa's Juno craft has captured giant, chaotic weather systems plus taken new measurements that will help build unprecedented map of the planet’s interior
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Tim Peake beat more than 8,000 applicants to the job. Here, he shares some images of the training he underwent, as seen in his new hardback, The Astronaut Selection Test Book
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Flight controllers at Nasa’s Jet Propulsion Laboratory in California react to the successful landing of InSight, a spacecraft designed to explore Mars's interior
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A plane with no moving parts in its propulsion system has successfully flown for a distance of 60 metres, proving that heavier-than-air flight is possible without jets or propellers
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Two decades ago, the Zarya module lifted off from Kazakhstan, ushering in a new era of high-tech cooperation in space
Virgin Galactic Richard Branson's space flights criticised as 'dangerous, dead-end tech'