Space

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Scientists have long understood that in the course of cosmic evolution, galaxies become larger by consuming smaller galaxies. The evidence of this can be seen by observing galactic halos, where the stars of cannibalized galaxies still remain. This is certainly true of the Andromeda Galaxy (aka. M31, Earth’s closest neighbor) which has a massive and nearly-invisible
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A four-year survey of the entire sky has just delivered results, and they are awesome: we have confirmation that the standard cosmological model, which describes the age, rate of expansion, history and contents of the Universe, is indeed accurate. For four years, the European Southern Observatory’s Planck satellite sailed the skies, constantly scanning and collecting
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Landing 12 people on the Moon remains one of NASA’s greatest achievements, if not the greatest. Astronauts collected rocks, took photos, performed experiments, planted some flags, and then came home. But those week-long stays during the Apollo program didn’t establish a lasting human presence on the Moon. More than 45 years after the most recent