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Shooting Star
Catch A Shooting Star

A meteor, sometimes called a 'shooting star,' can be the brightest object in the night sky, yet meteoroids are the smallest bodies in the solar system that can be observed by eye. Wandering through sp ...

The Equivalence Principle

Four hundred years ago--or so the story goes--Galileo Galilei started dropping things off the Leaning Tower of Pisa: Cannon balls, musket balls, gold, silver and wood. He might have expected the heavi ...
This photograph of the coil-shaped Helix Nebula is one of the largest and most detailed celestial images ever made.
A Ring Around a Dying Star

In November 2002, sky watchers were viewing the glow of meteors from the Leonid meteor shower burning up in Earth's atmosphere. They had been anticipating this celestial light show for months, expecti ...

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