Researchers have unveiled a light of pollution map of the U.S., revealing areas where you can still find "pristine" skies.
The comet is currently flying towards the inner Solar System at speeds of more than 51,000 miles per hour.
The secret is in the structure of asteroids, which look surprisingly like Swiss cheese.
What if humans could take over meteor showers and make them perfect Instagram fodder?
A little-known band of scientists are scanning the sky for killer asteroids and drawing up plans to save the world.