Could you pass Astronomy 101? Take the quiz!

1. What's the brightest star in the night sky?

This image taken by NASA's Spitzer Space Telescope shows a portion of sky near Canis Major, which contains the night sky's brightest star.

Sirius (in Canis Major)

Rigel (Orion's knee)

Betelgeuse (Orion's shoulder)

Polaris (The North Star)

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