What term is most commonly used to refer to the actual motion that stars have in relation to each other, and over many years will lead to changes in the shapes of constellations?
109Most astronomers believe that these celestial bodies are at the center of quasars and are the main reason for their large energy emissions?
137Whos book, titled concerning the revolutions of celestial spheres, is considered to mark the birth of modern astronomy?
89If the temperature of a star increases from 10,000k to 30,000k, by what factor will the rate of energy radiated per second increase?
114
How many earths can fit into jupiter s great red spot?
What substance is responsible for neptunes blue-green color?
Is the moon escaping the earth?
The hydrogen envelope that surrounds the comets nucleus derives its hydrogen most directly from?
Does non-carbon based life exist somewhere in the universe?
What are black holes? Do they exist in reality?
Which unmanned space vehicle fetched roak pieces from the moon?
How many moons does neptune have?
Tell me how many moons does saturn have?
What is the thinnest layer of the suns atmosphere?
How many moons do Mars planet have?
Whos book, titled concerning the revolutions of celestial spheres, is considered to mark the birth of modern astronomy?
Did water come from comets?
Do galaxies interact?
In which constellation is abig nebula still giving birth to stars?