It would rewrite the Standard Model of physics.
For the first time, a Polish group has identified two nearby stars that seem to have plucked up their icy partners, swinging them into orbits around our sun.
Astronomers are learning that in some regions of our galaxy, stars have clumped into features that resemble ones on Earth — streams, waves, arches and mountain ridges.
If you look around space, you'll notice a lot of things — the planets, stars, moons, even the galaxy itself — have one thing in common: they're spinning. So, is the universe spinning, too?
Measures of the universe's expansion taken from different sources don't match. An exotic form of dark energy particles could be the reason why.
Black holes are engines of destruction on a cosmic scale, but they may also be the bringers of life.
The neutrinos enmeshed in the vast cosmic web could provide a glimpse of the earliest observable moment after the Big Bang.
A super-precise measurement of one of the fundamental constants of the universe suggests it's expanding faster now than it was in its early years.
The evidence for aliens around one of the weirdest stars in our galaxy — Boyajian's star — is not looking promising.
A mysterious cosmic signal that was detected above the North Pole could be coming from fast-spinning grains of dust.
So far, gravitational waves have found no hints of extra dimensions, but there may still be some really tiny ones lurking out there.