Discover a complete Einstein ring, the first strong gravitational lens, which allows us to refine nearby stellar mass and ...

The newly found black hole is about 36 billion times the mass of the sun. That's 10,000 times heavier than Sagittarius A*, the black hole at the center of the Milky Way galaxy. The immense size of the ...

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

Hundreds of millions of years ago, an asteroid caught by Earth's gravity might have fragmented, creating a temporary ring ...