The idea of cosmic threats to Earth almost sounds like the stuff of fiction. But while alien invasions may be far fetched, these threats are perfectly real.

These mysterious objects can have masses several million or billion times that of the Sun and are so dense that they warp space time around them. As far as astronomers know, all galaxies harbour a ...

FOUR planets are visible in the night sky. You will have to battle January clouds, but here is how to find them.

Stargazers will be treated to a dazzling six-planet "alignment" this January.

Pinpointing a Milepost Marker Star that Opened the Realm of Galaxies At the dawn of the 20th century, astronomers faced a ...

With winds blowing at 20,500 mph, "the planet has complex weather patterns just like Earth and other planets of our own ...

While claims of a “rare alignment” are overblown, you can still see up to six planets in the night sky this weekend. Here's ...

Earth's temporary asteroid friend last year was a chunk of its real moon that had been blasted into space thousands of years ...

Recent studies have revealed that, until now, Hot Jupiters seem to be the only planet in orbit around their host star. This ...

In the United States, funding for planetary defense has long had strong bipartisan support both inside and outside of ...

An object we thought belonged to the most common category of planet in the galaxy has turned out to be something we've never seen before.

Scientists think a small rock discovered near Earth last August was hurled into space by an ancient impact on the lunar surface.