| October 29 Did Ceres Once Have an Ocean? | | | |
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| | | | How do human genes act in space? | | "Looking at gene expression ... we really see an explosion, like fireworks taking off, as soon as the human body gets into space." | | | | | |
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| | | Tonight … Perseus the Hero and a Demon Star | Algol isn't Perseus' brightest star, but it's probably its best known star. Algol is easy to spot in a dark-enough sky. | | | | |
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| | Photos: Observe the Moon Night | Last night was International Observe the Moon Night, and EarthSky community members from around the world sent photos, reminding us that we all see the same moon. This shot is from Talha Zia of Karachi, Pakistan. | | |
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