These are photos of Mercury crossing and passing over the Sun, a rare event that last occurred a decade ago. These are the best photos of Mercury’s transit.
Watch Mercury cross in front of the sun online live, right here. Watch NASA’s and five other livestreams, including videos from other countries, all day.
These are videos of the stunning total solar eclipse on March 8, 2016. The next total eclipse won’t be until August 2017.
A stunning solar eclipse was seen in parts of Indonesia, Malaysia, Nepal, Australia, and other regions today. These are photos of the total and partial eclipse.
Tonight’s total eclipse of the sun won’t be viewable in the U.S. When is the next total solar eclipse that you can see in the United States? Is it far away?
Tonight is a rare total solar eclipse. Watch three free livestreams of the eclipse and find out what time this year’s only total eclipse of the sun begins.
These are the best Twitter and Instagram photos from Astronaut Scott Kelly’s year in space. Stunning photos show the immensity of our universe.
Astronaut Scott Kelly returns after a year in space. Find out more about his mission, little-known facts about his year, and what we’ll learn from his trip.
Watch the livestream of astronaut Scott Kelly returning to Earth after spending a year in space.
Apollo 10 astronauts heard strange music on the other side of the moon. But the explanation isn’t so mysterious. Find out what they heard and listen to it.
These are photos of Albert Einstein and his journey with the General Theory of Relativity, which predicted gravitational waves.
What are gravitational waves? How does LIGO detect them? This video about gravitational waves by PHD Comics will answer your questions.
Astronaut Edgar Mitchell believed aliens and UFOs were real and part of a huge coverup. Did he ever see aliens? What did he say publicly?
Astronaut Edgar Mitchell has died. He was the sixth man to walk on the moon and often spoke about alien theories.
A meteor’s coming very close to Earth, and it’s bigger than the Chelyabinsk, Russia meteor that injured thousands. Here are videos & details on Chelyabinsk.