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.
The ecliptic is an imaginary line that marks the path of the sun. You can also find the planets and moon near this line, tracing the plane of our solar system.
Some extremely large and hot stars blaze away with the stellar luminosity of a million suns! But other stars look bright only because they're near Earth.
What is a variable star? It's a star that brightens and dim in a cycle that might last hours, or weeks, or months, or longer. Astronomers know millions!