Quarks to Quasars

Milky Way

The Milky Way is the galaxy in which Earth is contained. This name derives from its appearance as a dim “milky” glowing band arching across the night sky, in which the naked eye cannot distinguish individual stars.

1. An image of the Milky Way’s Galactic Center in the night sky above Paranal Observatory

2. Artist’s conception of the spiral structure of the Milky Way with two major stellar arms and a bar.

3. Illustration of the two gigantic X-ray/gamma-ray bubbles (blue-violet) of the Milky Way (center).

4. A false-color infrared image of the core of the Milky Way Galaxy taken by NASA’s Spitzer Space Telescope. Older cool stars are blue, dust features lit up by large hot stars are shown in a reddish hue, and the bright white spot in the middle marks the site of Sagittarius A*, the super-massive black hole at the center of the Galaxy.

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