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Each sunspot cycle has been getting less intense. Is our star falling asleep?

We take you on a moonlit tour of our rocky companion

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24 May 2021 Do we have to kill off the theory of space and time to make sense of the universe? (Image credit: Tobias Roetsch) As in history, revolutions are the lifeblood of science. Bubbling undercurrents of disquiet boil over until a new regime emerges to seize power. Then everyone's attention turns to toppling their new ruler. The king is dead, long live the king. This has happened many times in the history of physics and astronomy. First, we thought Earth was at the center of the solar system — an idea that stood for over 1,000 years. Then Copernicus stuck his neck out to say that the ...

Space Mysteries: An international team of astronomers is on the hunt for objects that should be impossible. Could the "missing stars" be a completely new phenomenon? (Image credit: Tobias Roetsch) Stars don't just vanish — or do they? For thousands of years, astronomers accepted the idea that the lights in the sky were fixed and unchanging. Even when it became clear that these lights were actually physical objects like the sun, one of the key assumptions for astrophysicists has been that they go through major changes very slowly, on timescales of millions or billions of years.  And when th...