For decades, scientists have known that ordinary matter — everything made of atoms — accounts for just 15% of the universe’s ...

The halo is more extended that astronomers originally thought, and contains enough hydrogen gas to resolve the problem of the ...

In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding?

A new analysis of the sky has finally confirmed where the missing half of the Universe's visible matter has been hiding.

Scientists found the universe's missing baryonic matter as invisible hydrogen outside galaxies using a method called 'stacking' ...

If current estimates of its age are right, then Sagittarius may have passed through our galaxy ten times. It is also possible, however, that Sagittarius hit the Large Magellanic Cloud (a satellite ...

Two galaxies, consuming startlingly large swaths of sky, hover in the south: The Large Magellanic Cloud spans the width ... ejected from the famous active galaxy 3C273. While looking at the ...

The Tarantula Nebula, also known as 30 Doradus, is a massive and luminous star-forming region in the Large Magellanic Cloud (LMC), a satellite galaxy of the Milky Way. The Cat's Eye Nebula, also known ...

Witness the majestic spiral arms of Galaxy NGC 1300, a barred spiral galaxy 61 million light-years away. Behold the birthplace of stars in the NGC 3324 region, a vast star-forming area in the ...