Facts about Astronomy

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to count the stars in the universe, we need a one followed by 22 zeros. Now realize that many of these stars are surrounded by planets. Then consider the moons that surround the planets, asteroids, nebula, galaxies, and all the other stuff the universe contains.

brightest stars as seen from Earth’s sun is 250,000 times closer than the next star.The sun is so bright that it washes out all the other stars in the daylight sky. In the light of the scale we use lower figures brighter. The scale we use the sun and the moon is 26.73 -12.6. The top five lists brightest stars are:

# 5 Vega, which means eagle or vulture in Arabic. It is about 25 light-years away from Earth, with a size of .03. Just because a star looks brighter from Earth does not mean it is actually brighter. Our sun, for example, appears brighter than any other star, even though it is not one of the brightest in the universe. It is because it is so close.

# 4 is Rigel Kentaurus, it is Arabic for roots Centaur. It is about four light years from Earth with a size -.01.

At # 3 is Arcturus. The Greek meaning protector of the bear. Arcturus is 37 light-years from Earth.

# 2 is Canopus. In reality, it is the brightest of all these top five stars. But it is 313 light years from Earth, so it is just another on the list as seen from Earth. -.62 Is the size seen from planet Earth.

# 1 is Sirius, which means scorching Greek. Sirius is also known as the Dog Star because it is the brightest star in the constellation Big Dog. It is only 9 light-years from Earth. It is the second closest of these top five. It seems to be the brightest star in the sky, with a magnitude of -1.44.

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