Ursa Major III was thought to be the faintest known satellite galaxy of the Milky Way. However, simulations by the research ...

A huge fireball lit up the skies over southern Japan on late on Tuesday, stunning onlookers in several prefectures. Footage ...

The new moon's estimated size is about 6 miles across, with its small size possibly contributing to its ability to hide from ...

Astronomers have detected a previously unknown moon circling Uranus, marking a notable addition to our understanding of the ...

Before exploding, a star shed most of its layers, giving a glimpse at a massive star’s deep interior. The event may represent a new kind of supernova.

Scientists have revealed some details over the possible “hostile alien threat” after Harvard University researchers said a celestial ...

The long-exposure images, some lasting up to 10 seconds, show Earth and the Moon shining against a starry backdrop in the constellation Aries. These tests are critical for calibrating the spacecraft's ...

Nasa’s ambitious Psyche mission, now more than halfway on its journey to the metal-rich asteroid Psyche, has delivered a spectacular milestone: it ...

Astronomers are living in a golden age of bigger and better telescopes. But even our most advanced technology pales in ...

You won’t actually see it, but a rare black moon – this one, the second new moon in an astronomical season – will appear on Aug. 23. Weather permitting, it'll give you darker skies and extra time to ...

But it’s not just looks. Rocky composition, general size, orbital behaviors—a lot of those qualities can be the same on both ...