Andromeda’s Dwarf Galaxies Mapped
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Produced by the Space Telescope Science Institute’s Office of Public Outreach in collaboration with NASA’s Universe of Learning partners: Caltech/IPAC, Center for Astrophysics | Harvard & Smithsonian, and NASA Jet Propulsion Laboratory.
Video imagery:
- Annotated Hubble image of Andromeda and satellite galaxies: NASA, ESA, Alessandro Savino (UC Berkeley), Joseph DePasquale (STScI), Akira Fujii DSS2
- Hubble data visualization of Andromeda and satellite galaxies: NASA, ESA, Christian Nieves (STScI)
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Pictures of planets and star systems.
Text: News from the Universe.
March 7, 2025.
Andromeda's dwarf galaxies mapped.
NASA's Hubble Space Telescope has completed a survey of the nearby Andromeda Galaxy and its satellite dwarf galaxies.
Hubble's data was used to create a precise 3D map of the 36 dwarf galaxies.
Unlike the small galaxies that orbit our Milky Way, the dwarf galaxies around Andromeda orbit in the same direction.
Another puzzle is the rate of star formation. Some of Andromeda's dwarf galaxies have continued to form stars at a low rate over eons, unlike those surrounding the Milky Way.
Long term observations like this Hubble survey help astronomers understand what's happening in the universe and how it compares or contrasts to our own experiences in the Milky Way galaxy.
This news was brought to you in part by the Space Telescope Science Institute in Baltimore, Maryland.
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