Astronomers have discovered something that shouldn't exist: a galaxy so jam-packed with stars that they smash into each other about once a month.

Solar flares heat ions much more strongly than electrons. The finding offers a new explanation for spectral line broadening. Recent work from the Andrews suggests that particles in solar flares can ...

A successful builder by day and traversing the sky by night, Isaac Roberts took the first clear photograph of Andromeda, the ...

Some scientists argue that mathematically it’s far more likely we live in a computer simulation than base reality.

AP photographer Dmitri Lovetsky had been trying to photograph a plane flying across the disk of the sun for several days.