The Solar Orbiter, a new mission from the European Space Agency and NASA, was designed to give us our first look at the sun's poles and to gather data that might help predict space weather.
A total solar eclipse is one of the most magnificent sights you can ever see. But you need the right kind of eye protection, and some of what's being sold out there isn't safe.
There's something deeply moving about watching the sun become progressively covered by the moon — and you have a rare chance to see this in the U.S. on Aug. 21, says astrophysicist Marcelo Gleiser.
The planet called KELT-9b is around three times more massive than Jupiter. It orbits a blue star about 650 light-years away from Earth that's nearly twice as hot as our own sun.
The small spacecraft is set to hurtle toward the sun at about 450,000 miles per hour. Scientists hope it will clear up some big mysteries, such as why the sun's atmosphere is hotter than its surface.
Scientists have answered a burning question central to the charm of sunflowers: Why do young flowers move their blooms to always face the sun over the course of a day?
Stargazers, ready your (solar-filtered) telescopes: Mercury will pass directly across the sun on Monday for more than seven hours. And you can watch when it does — if you do it just right.
If you don't know why Earth has a solstice — or seasons, for that matter — you are in good company, says astrophysicist Adam Frank. But he's going to clear it up for you.
With temperatures cracking 100 every summer, how do we protect our skin? We talk to experts about how to choose the best sunscreens, and what steps that you (and your kids) can take to protect yourself from sunburn and the risk of skin cancer. Send us your questions.
