All in Space

Cosmic Blast

An extremely large solar flare (as if there's ever a small one) was followed by mind-blowing mass ejection that blasted billions of tons of atomic particles toward the Earth at 3 million miles per hour.

The Lost Comet

In 1770, Lexell's Comet blazed a brilliant path across the evening sky. It is noted for being the comet that came closest to the earth. It came within 1,370,000 miles, which in astronomical terms is almost too close for comfort.