Black Holes...

1. X-Ray
Sun: You can see the gas of the corona around the sun, as well as sun spots on the solar disk.
Moon: The phases of the moon can be seen because x-rays from the sun are reflected by the moon.
Crab Nebula: There is a pulsar that was caused be an exploding star that is visible.
Betelgeuse: not available.
Saturn: The x-rays are mostly reflected from the sun.
Visible Light
Sun: Two black sun spots can be seen on the sun, you should wear protective eye wear.
Moon: Impact craters can be seen on the moons surface.
Crab Nebula: A hot (blue) gas, as well as a cooler (red) gas is visible.
Betelgeuse: Appears much brighter than the sun, and appears redder in the night sky due to its cooler temperature.
Saturn: The light visible from Saturn is reflected sunlight. The gap between the rings is called the Cassini division.
Radio Waves
Sun: Sun spots around the solar equator are seen, they spread thousands of miles across, and are sites of intense radio wave emission.
Moon: Due to the heating of the sun you can see that the light part of the moon emits more radio waves than the dark part.
Crab Nebula: Radio waves show a web-like structure that was caused by shocks through the ejected gas.
Betelgeuse: Has an asymmetric structure, due to activity in the outer atmosphere of the star.
Saturn: The rings and surface of Saturn is cold, and the inside on Saturn is warm.

3.
What is a black hole? A black hole is an object that is so compact that its gravitational force is strong enough to prevent light of anything else from escaping.
How many black holes are there? There are so many black holes that you are unable to count them all.
Do black holes obey the laws of gravity? Yes

Global Science day 1... What I want to learn in global science

In global science I would like to learn about how we impact our enviroment, and how we can help preserve it. As well as basic knowledge of space, and what it consists of. Anything about global science i would be interested in learning about.