Historically, the Andromeda Galaxy (M31) was a subject of extensive debate, initially considered a "nebulous smear" and later central to the "island universe" hypothesis proposing its status as an ...
In October 1923, Edwin Hubble utilized the 100-inch Hooker telescope to photograph the Andromeda Nebula, identifying a variable star within it. Hubble applied the known period-luminosity relationship ...
Huge eruptions from the Milky Way’s supermassive black hole in the distant past may have sterilized much of the inner galaxy ...
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What a collision of the Milky Way and Andromeda means
The bold question-askers at What If examine what would happen if the Milky Way and Andromeda collided.
The Milky Way's closest neighbor shines in a spectacular new astrophotography portrait. Astrophotographer Ronald Brecher has captured a stunning image of our neighboring spiral galaxy, Andromeda, ...
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