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6 hours ago · Why do astronomers look for signs of life on other planets based on how life is on Earth? Couldn’t there be totally different kinds of life on other planets? – Henry, age 13, Somerville ...
22 hours ago · Why do astronomers look for signs of life on other planets based on how life is on Earth? Couldn't there be totally different kinds of life on other planets? - Henry, age 13, Somerville, Massachusetts
6 hours ago · Dubbed the “ parade of planets ,” Mercury, Mars, Jupiter, Saturn, Uranus and Neptune are set to line up in the sky starting on June 3 and will be visible for two weeks. As the planets play a ...
22 hours ago · This is a timeline of space exploration which includes notable achievements, first accomplishments and milestones in humanity's exploration of outer space . This timeline generally does not distinguish achievements by a specific country or private company, as it considers humanity as a whole. See otherwise the timeline of private spaceflight or ...
22 hours ago · The other terrestrial planets ( Mercury, Venus, and Mars) as well as the Moon are believed to have a metallic core consisting mostly of iron. The M-type asteroids are also believed to be partly or mostly made of metallic iron alloy.
