Describe the life cycle of a star.

Scientists are not exactly sure when or where the first modern humans lived. true false

River separating south africa from botswana and zimbabwe

What elements and compounds primarily make up the sphere?

Suppose you observed emission lines from gas 30 light-years from the center. how would you expect the doppler shifts of those lines to be different, assuming that the gas really is orbiting a supermassive black hole?

10. Studies have found that a person is most likely to be involved in a fatal crash with an impaired driver during the hours of O 3:00 and 6:00 p. m. Noon and 3:00 p. m. O 7:00 and 10:00 p. m. 1:00 and 3:00 a. m.

According to the International Astronomical Union, which of the following is one of the criteria for an object to classified as a Planet? Select all that apply.

What physical features are the five largest cities in the u. S. Near?

Because of his failed economic plan, Mao Zedong later opened China up to foreign trade. True False

Your friend tells you that our orbit is so special that it is at just the right distance from the sun for us to be at the right temperature for life to flourish. He says that if we were even ten miles closer to the sun, we would burn up.

The suns energy is classified by what