Reference A look at the phases of the moon, from new moon to full moon, including's tonight's lunar phase.
Stars appear to twinkle because the light from these distant objects passes through wobbly air in the atmosphere.
Stars are born amid turbulent clouds, and their deaths can be just as explosive. But how long do stars live? It depends on the size of the star.
Reference Lunar eclipses occur when the moon falls into Earth's shadow, creating a blood moon, and can be total, partial or penumbral. Here's when one will happen next.
To better understand the universe, we may need to kill off one of the most important theories of all time.