Galaxy Shapes in an Attic
Pale Blue Pod
00:00
What Is the Hubble Tuning Fork?
The most common way to classify galaxies is by their shape. Edwin Hubble, the same guy who basically confirmed that there are other galaxies out there and then also confirmed the accelerating expansion of the universe looked at a bunch of different galaxies through his telescope. In 1926, Hubble came up with this classification scheme called the Hubble Tuning Fork. This is a convention that we still use today, even though we know it's wrong.
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