There's a micromoon coming up. That's when the full moon will look slightly smaller and dimmer. But the change may be tricky ...

Learn how through a process known as molecular hydrogen cooling, stars may be able to form in dark matter halos under 10 million solar masses.

It took just 1 hour and 40 minutes for the moon's shadow to race more than 4,000 miles (6,500 kilometers) across the ...

Titan, Saturn's largest moon, is a strange, alien world. Covered in rivers and lakes of liquid methane, icy boulders and ...