A black hole has such a powerful gravitational pull that it sucks up everything nearby, including light.
Eye movements can cause you to mistakenly perceive isolated objects as moving.
Summer is nearly here. Ever wonder why moths fly toward bright lights? Find out on today's Moment of Science.
On a dark night, you can see thousands of stars with the naked eye. What makes the North Star stand out above the rest?
As it turns out, life may not be limited to orbits around sun-like stars.
The Kepler space telescope has shown us that we live in a galaxy full of Earth-sized planets.
Did you know it seems we're discovering a new exoplanet every week?
If you've ever glanced skyward, you've probably noticed the sheer numbers of stars. Some are tiny, barely visible points. Others radiate strong white light.
Supernovas explode with a bright burst of radiation, giving off as much energy in a few days as our sun will give off in its entire lifetime.
When we are in a fairly dark room, or outside at night away from lights, we can still see, but we can't see the colors of things very well. Why is that?