Light pollution isn't just an annoyance for astronomers; it's
wasteful, can harm wildlife and may even damage your health.
We all know the planets are far away. But this neat little
tool will help you visualize the vast expanse of interplanetary space
between Earth and Mars.
In 1964, Gagarin took up the challenge of designing the Soviets' first spaceplane.
It is thought that Mars life will have burrowed deep under
the ground, well out of the reach of Curiosity's drill.
A puzzling meteorite with unknown origins: It could be from
the surface of Mercury, but something doesn't quite add up.
The Universe is a vast and wondrous place -- so it shouldn't
be surprising that you'll find all kinds of substances in all kinds of
places, even the main ingredient in sunblock around a very old star.
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