Astronomers can usually spot "planet killer" asteroids long before they approach Earth. But what if they can't?

They have been there for millennia, before the earth was born, taking light years to reach us. For all you know, that shining ...

One of the leading voices arguing that 3I/ATLAS may be an alien spacecraft has revealed when humans may discovery the ...

Over the past seven decades, thousands of sophisticated spacecraft have been launched on ambitious missions to look down on our planet, explore the wonders of our star's domain, or venture into the ...

A UCLA-led team has achieved the sharpest-ever view of a distant star’s disk using a groundbreaking photonic lantern device ...