Astronomers have identified a colossal giant radio galaxy (GRG) stretching 3.3 million light-years across—32 times the size ...

Stargazers will be treated to a rare seven-planet alignment in February. This is what scientists hope to learn.

Astronomers have completed a stunning massive photomosaic of our closest celestial neighbor, the Andromeda galaxy, comprised ...

"Photographing Andromeda was a herculean task because the galaxy is a much bigger target on the sky than the galaxies Hubble ...

A radio telescope in South Africa has unearthed a giant galaxy—dubbed a "cosmic megastructure"—with plasma jets that measure ...

Hubble Space Telescope mapped Andromeda, revealing a chaotic history shaped by mergers. A 2.5-billion-pixel mosaic shows 200 ...

Astronomers have discovered an extraordinary new giant radio galaxy with plasma jets 32 times the size of our Milky Way.

After a close look with a powerful radio telescope, astronomers are still puzzled by a pair of objects with strange ...

This NASA/ESA Hubble Space Telescope image reveals a tiny patch of sky in the constellation Hydra. The stars and galaxies ...

"If our eyes were able to detect X-rays, the sky would be full of dots. And every single one of those dots would be an ...