Space oddity

• Autores: Geraint F. Lewis
• Localización: New scientist, ISSN 0262-4079, Nº. 3149, 2017, págs. 24-25
• Idioma: inglés
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• Resumen

  • Hints of oddness have been building for years. At the end of the 1990s, theoretical models predicted that the galaxy should have thousands of orbiting dwarf galaxies, but far fewer were seen. This problem came with another: the apparent lack of large satellite galaxies orbiting the Milky Way. More recently, the small number of accompanying dwarfs and galaxy, Andromeda, were found to lie on well-defined planes, again at odds with theoretical expectation. Now, the Satellites Around Galactic Analogs Survey shows that dwarf galaxies orbiting Milky Way-like galaxies beyond our group of galaxies are actively forming stars, while our own dwarfs appear to be sedately aging with no new stars.