A team of astronomers may have discovered a galaxy invisible to our telescopes. This finding could shed light on a ...

Everything we visualize about space, including stars, planets, gases, and even galaxies, make up just a small fraction of the ...

If dark energy is weakening, as suggested by recent results, then the cosmos is far stranger than most physicists had ...

The word itself comes from galaktikós kyklos, or “milky circle,” the ancient Greek term for the Milky Way, our home galaxy.

Famed for its unbelievable size — containing the mass of some 600 trillion suns — it also has a reputation for being one of the few "relaxed" galaxy ... major merger." Dark matter is the ...

A mysterious cluster of 60 stars may be just another Milky Way star cluster, or it may be one of the smallest galaxies ever ...

With the formation of the first galaxies, the Universe burst into light (let there be light), bringing the cosmic dark ages to an end; and resulting in two different populations, like some of the ...

Astronomers have discovered a mysterious object in space that may be the smallest galaxy in the Universe, or the oldest star cluster in the Milky Way.

How do you distinguish a galaxy from a mere cluster of stars? That’s easy, right? A galaxy is a large collection of millions ...

Using the Subaru Telescope at Maunakea, Hawaii, the team discovered a “Dark Matter bridge” connecting Perseus to a subcluster ...

All but one of Andromeda's satellite galaxies were found to be pointing right at us. According to our best models, that ...