A pin being pushed into a bubble, in which there is an image of the Universe

Can cosmic inflation be ruled out?

03 November 2022

Astrophysicists say that cosmic inflation – a point in the Universe’s infancy when space-time expanded exponentially, and what physicists really refer to when they talk about the ‘Big Bang’ – can in principle be ruled out in an assumption-free way.

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 ̽»¨Ö±²¥Atacama Large Millimeter/submillimeter Array (ALMA) by night

Slow spin of early galaxy observed for the first time

01 July 2022

One of the most distant known galaxies, observed in the very earliest years of the Universe, appears to be rotating at less than a quarter of the speed of the Milky Way today, according to a new study involving ̽»¨Ö±²¥ of Cambridge researchers.

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H1821+643, a quasar powered by a supermassive black hole

Chandra Observatory shows black hole spins slower than its peers

30 June 2022

Astronomers have made a record-breaking measurement of a black hole’s spin, one of two fundamental properties of black holes. NASA’s Chandra X-ray Observatory shows this black hole is spinning slower than most of its smaller cousins. This is the most massive black hole with an accurate spin measurement and gives hints about how some of the universe’s biggest black holes grow.

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