Space
How big is the Milky Way compared to the Sun?
If the Sun were shrunk to the size of a white blood cell, the Milky Way would be roughly the size of Earth.
Source: Scale: 1.4 million km to 12 µm.
Context
If the Sun, about 1.4 million km across, were shrunk to the size of a white blood cell, about 12 micrometres, the Milky Way would be roughly the size of Earth.
The scale factor is the same for both. It is a way of feeling the gap between a star and a galaxy, since neither number means much on its own.
This fact sits next to the height test. See where you land.
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