The night sky is not always black. Sometimes it glows red or green. This happens because of storms on the sun. The storms give off gases. When they hit Earth's air, they glow. Usually these lights can only be seen near the
North Pole. But in October 2011, the lights were different. People all across the southern United States saw them.
The
in the southern sky were unusual.
A clouds
B colors
C С
stars
D
planet