Stars

Question 1

What makes stars produce energy?

Revolt · Accepted Answer

nuclear fusion

Question 2

Which star on this diagram is the most similar to the Sun in luminosity and temperature?

Revolt · Accepted Answer

Centauri A

Question 3

Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is the Sun. Rigel has the Sun. Rigel has a surface temperature of about .

Revolt · Accepted Answer

bigger than; Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is the Sun. Rigel has the Sun.: bigger than; Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is the Sun. Rigel has the Sun.: a higher temperature than; Rigel and the Sun have similar characteristics, but they also differ in some ways. Rigel and the Sun are spheres of gas that use nuclear fusion to produce energy. Rigel is the Sun. Rigel has the Sun.: 11,000 K

Question 4

Which statement describes absolute and apparent brightness?

Revolt · Accepted Answer

Absolute brightness is the actual amount of light produced by the star, whereas apparent brightness changes with distance from the observer.

Question 5

What is the approximate temperature of the supergiant Betelgeuse?

Revolt · Accepted Answer

3000 K

Question 6

The of light is the rate at which light travels through empty space, or about 300,000 km per second.

Revolt · Accepted Answer

speed; The of light is the rate at which light travels through empty space, or about 300,000 km per second.: speed; A light-year is a measurement of .: distance; The distance between stars is measured in light-years rather than in miles or kilometers because the distance between stars .: is very large

Question 7

Why can’t astronomers take a picture from inside a black hole?

Revolt · Accepted Answer

Gravity is so strong that even light cannot escape a black hole.

Stars Answers

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