A magic trick turns the universe into a giant magnifying glass.
The explosion killed all seven astronauts on board.
The NASA Goddard Space Flight Center was a hot spot of dinosaur activity.
The panoramic photo shows how memorable even just 11 miles can be—on Mars.
Christa McAuliffe was planning to film lessons aboard the Challenger for classrooms all over the country to use.
Right now, it's impossible to know how thick the stuff at Europa's surface may be.
We've spent $87 billion on the space station since 1993.
But don't worry, NASA says it has zero chance of colliding with Earth.
The moon's unique atmosphere is part of the reason the Cassini mission had to come to such a bitter end.
The astronaut does not have medical problems or family issues.
The vacuum cleaner on the ISS has previously been used as a musical instrument and as an actual vacuum cleaner.
The space agency offered no explanation for why she was replaced.
Insurance expert says taxpayers will likely foot the bill.
The new system will produce as much as 50 times more power as those that currently fuel spacecraft.
Events like these occur dozens of times each year. Why was this one special?
The spacecraft will be exposed to light 500 times brighter than what we see.
The galaxy cluster, featured in a Hubble Space Telescope photo, weighs in at three million billion suns.
There is indeed evidence of an ancient ocean on Mars, but seashells and a sphinx? Not so much.
The contents include plants, fiber optics and even mice.
See our own Milky Way galaxy before floating to a place where baby stars are formed.