Features

Cosmic Origins of the Elements

The creation of the chemical elements required the tremendous heat that was produced first in the Big Bang and later at the cores of stars.

The 1988 Eclipse from Space

A weather satellite captured the Moon’s shadow as it fell over the Pacific eclipse track this past March.

The Pull of Planet X

There’s as much evidence for the existence of a tenth planet as there is against it.

Thinking Telescopes

Automated 8- to 30-inch telescopes are revolutionizing the way stellar research is conducted.

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