For nearly a century, astronomers have known that the universe is expanding. Most galaxies are carried outward with the flow ...

Add Yahoo as a preferred source to see more of our stories on Google. Fireworks aren't the only thing illuminating the sky this month. July also presents the opportunity to catch a cosmic light show, ...

Do the building blocks of life exist beyond the Milky Way, and can we identify them? This is what a recent study published in The Astrophysical Journal Letters hopes to address as an international ...

A mysterious flash of X-ray emission from outside the Milky Way has left astronomers puzzled.

Astronomers propose that an ultra-dense clump of exotic dark matter could be masquerading as the powerful object thought to ...