NASA explains how and why the yearly event occurs
That's more than 4.5 billion years old
Traveling at 2.5 million miles per hour
New research shows indoor tanning can cause skin cancer even if you never get burnt
They must have been sick the day this was taught in school.
The developer seems to have choked under the pressure of his game's success
The event marks the longest night in the Northern Hemisphere and the longest day in the Southern Hemisphere
Every 11 years, the Sun's magnetic poles reverse themselves. That has big implications for satellites, global communications and even astronaut safety
It's a comet! It's an asteroid! It's a bit of both—and it's one of the niftiest little members of the solar system
A probe is being designed to fly into the sun—and, more impressively, fly out again.