As NASA develops a plan to carry out a new administration policy calling for a human return to the moon, companies developing lunar landers and related infrastructure are seeking to play a role.

Commercial lunar lander company Moon Express announced an agreement with NanoRacks Oct. 10 to carry commercial payloads to the surface of the moon.

See what cosmic dust can do! Head outside this weekend for the peak of the Orionid meteor shower and an eyeful of zodiacal light.

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The answer is one 1 astronomical unit. How far is that?

Two methods that scientists use to measure the expansion of the universe produce different answers. A recent episode of NASA's ScienceCasts video series explores this conundrum.

Heat and light from the sun make life on Earth possible.

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