When he became the first American to orbit the Earth, John Glenn gave the United States a boost in the space race, making him one of the most famous Americans alive.
An analysis of radioactive chemicals in ice cores indicates one of the most powerful solar storms ever hit Earth around 7176 B.C.
Why we sometimes see the moon and the sun at the same time.
The orbiting satellites are giving scientists insight into deep water supplies on Earth
The fastest-spinning white dwarf on record completes a full rotation in 25 seconds.
Scientists need to pin down the lifetime to better understand fundamental physics questions, like how the universe evolved.
Understanding these ancient objects that sometimes produce cometlike tails may help explain how the solar system formed.
We can't put Earth on a scale, but there are other ways to figure out the weight of our world.
Sorting out space rocks and setting the record straight.
Catch a glimpse of a meteor shower this month.
Six decades ago, the Soviets launched a cosmonaut into orbit, shaking up the Cold War in ways that still reverberate.
There's a research station in Hawaii being used as a long-duration Mars and moon exploration project.