Astronomy
Don’t Write Off ET Quite Yet
It’s true that we haven’t seen alien life, but neither have we seen much of the universe.
A Quick Spin Around the Big Dipper
See how the night sky would appear from a different part of the galaxy.
What’s 250 Million Light-Years Big, Almost Empty, and Full of Answers?
Astronomers are using new tools in their search for cosmic voids.
NASA Is Going to Dip This Cup Into the Sun’s Corona
A 2018 mission will send a probe to within 4 million miles of the sun.
When the Earth Had Two Moons
A new model—“The Big Splat”—explains the strange asymmetry of the moon.
