When light from the sun or the moon travels through more atmosphere to your eyes, you see oddly shaped suns or moons in interesting and beautiful ways.
Venus will pass between Earth and the sun on March 22-23. You might be able to see Venus in both the morning and evening twilight for a few days before then.
In the view of modern cosmologists, the Big Bang is the event that marked the birth of our universe. What was it - when was it - and what are modern theories?
Comets are diffuse balls of ice and dust orbiting the sun. They're sometimes visible in our skies. A comet's tail can stretch millions of miles across space.