Space
Stars can start shining at a smaller mass than we thought
Objects with only 6.7 per cent of the sun鈥檚 mass can be stars, according to a fresh measurement of how massive an object must be to achieve nuclear fusion
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Earth
Odds on: Five scientific theories decided by wager
Features
Space
Neptune-like exoplanet spotted that has a watery atmosphere
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Space
Waves surge in opposite directions around Io’s largest lava lake
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Space
NASA rocket mission takes 1500 sun images in just 5 minutes
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Space
Earth may have been born in a huge flare-up of the young sun
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Space
Watch Cassini’s first two dives between Saturn and its rings
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Space
Marvel at the images from Cassini’s first Grand Finale orbit
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Space
First look at images from Cassini’s dive between Saturn’s rings
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Space
Melting moons could support liveable atmospheres for aeons
If a migrating exoplanet dragged a Europa-like moon closer to its host star, the moon鈥檚 icy shell could melt into liquid oceans and breathable air
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Space
Mars Trojans may be part of a planet that was destroyed long ago
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Space
Joint mission to Europa could seek life under the ice
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Space
Icy Enceladus鈥檚 tiger stripes are a window on its watery depths
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Space
Earth鈥檚 greatest hits: Six of the biggest meteorites in history
Features