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Ken Croswell

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Life and times of a chameleon star: Since 1955, astronomers have watched the star FG Sagittae turn from blue to yellow. This rapid change has given them the chance to study a star’s evolution in their own lifetime

Science: Old star upstages the big bang show

Mercury – the impossible planet?: By all accounts, the planet nearest the Sun is the wrong size and in the wrong place. Only a mission to Mercury can resolve the puzzle it poses

Forum: A plague of planets – Ken Croswell wishes astronomers would stop crying wolf

Science: How to spot planets round distant stars

Science: WIMPs could make the Sun’s core go rigid

Science: Has the Milky Way formed stars in bursts?

Science: ‘Microlens’ could reveal distant black holes

Science: Supernova theory exploded by solitary white dwarfs

Forum: What’s so special about the centre? – It is time for a little post-Copernican thinking

Science: A tunnel driven through the Galaxy’s fog

Science: Asteroid turns comet