Pulsating remnants of stars hint at a clump of invisible matter thought to be about 10 million times the sun’s mass.

The month is packed with skywatching highlights—including six visible planets, an annular solar eclipse, and the Milky Way’s bright core returning to view in the Northern Hemisphere.

When we think about orbits, we usually picture the Earth zooming around the sun. But does the sun just sit there? Or is it on its own journey? I asked my friend Guy Worthey. He’s a space scientist at ...

A Milky Way collision with a supermassive black hole might be closer than we thought. A potential collision between this hidden black hole and the Milky Way’s Sagittarius A could occur in two billion ...

Astronomers have chased hypervelocity stars for more than a century. These rare objects move so fast that the Milky Way ...

The Milky Way is not the calm, flat starry disk many of us learned about in school. Astronomers are now tracking a colossal, curling disturbance that ripples through our Galaxy’s disk, lifting and ...

CAPE CANAVERAL, Fla. (AP) — It turns out that looming collision between our Milky Way and Andromeda galaxies might not happen after all. Astronomers reported Monday that the probability of the two ...

The Milky Way is expected to stand out in the sky in the coming days. The billions of stars comprising our home galaxy should appear especially vibrant in late-May as the band arcs across the night ...