The Veil Nebula is a cloud of heated and ionized gas and dust in the constellation Cygnus. This image is captured by Hubble Space Telescope. V838 Monocerotis is a cataclysmic binary star in the ...

Astronomers have been confounded by recent evidence that the universe expanded at different rates throughout its life. New findings risk turning the tension into a crisis, scientists say.

The team behind these findings used the sixth and final data release from the Atacama Cosmology Telescope (ACT) in combination with Year 1 data from ... akin to stacking ancient cosmic photographs ...

Over the past decade, cosmology has been embroiled in a growing crisis. Fuelling it are observations, first made by the Hubble Space Telescope and later by the James Webb Space Telescope ...