A mysterious cosmic blast 1.3 billion light-years away has left scientists stunned. What began as a familiar stellar event ...

When astronomers look deep into the early universe, the expectation is simple. You should see young galaxies still assembling ...

Astronomers have uncovered the long-hidden cause behind Betelgeuse’s strange behavior: a small companion star carving a visible wake through the giant’s vast atmosphere. Using nearly eight years of ...

Only a small fraction of the observable universe is comprised of visible matter. Current data suggests all galaxies are ...

Astronomers announced the discovery of a starless cloud of hydrogen gas, a pristine relic of the cosmos that is almost as old ...

Astronomers have signalled the discovery of a planetary body roaming the Milky Way that is not gravitationally bound to the ...

With sapphire waterfalls, lava rain and orbits around dead stars, these distant worlds push the limits of what’s possible.

The universe has likely shifted from a period of acceleration to a phase of deceleration, new study by Korean researchers ...

Hints of impossibly bright, massive objects in the infant universe have forced astronomers to rethink how the first cosmic ...

In the very young universe, just a fraction of its current age, astronomers have stumbled on a set of objects that refuse to ...

They believed that the indefinite expansion would spread the stars so far apart that the sky would appear dark throughout and ...

A new study questions dark energy's role in the universe's acceleration, suggesting it may be weakening instead.