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Chapter 5

Chapter 5. planet- a large body in space that revolves around a star. asteroid- a small rocky object that orbits the Sun. Many scientists believe that the dinosaurs were killed from the effects of an asteroid that hit the Earth 65 million years ago.

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Chapter 5

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  1. Chapter 5

  2. planet- a large body in space that revolves around a star

  3. asteroid- a small rocky object that orbits the Sun Many scientists believe that the dinosaurs were killed from the effects of an asteroid that hit the Earth 65 million years ago.

  4. They all start off in space. They are like asteroids, but smaller. They all start as meteoroids. They are chunks of rock in space. When they enter our atmosphere, they burn. Those burning are called meteors. Most burn until there is nothing left. If there is something left and it makes it to the Earth’s surface, it is called a meteorite. Meteorites, Meteors, and Meteoroids

  5. light-year- unit of measurement for distances in space; it equals the distance light travels in a year (it’s about 5.8 trillion miles) Distances are so large in the universe that we can’t really use miles. Light years are just easier. It’s also interesting to think about the light we are seeing. For instance, when we look at things in the sky, we don’t actually see how they look right now; we see what they looked like. When we see the: Moon- we see it as it was 1 second ago Sun- 8 minutes ago Saturn- 80 minutes ago Sirius (the brightest star)- 8.5 years ago Andromeda galaxy- 2.2 million years ago

  6. comet- a small, orbiting body made of dust, ice, and frozen gases Here is a picture of Halley’s comet and two images of it’s odd orbit.

  7. inner planets- the four planets of our solar system that are closest to the sun Mercury, Venus, Earth and Mars

  8. magnitude- the brightness of a star as perceived from Earth In this picture of stars it seems that some are bigger or closer than others. That may or may not be true; it also has to do with their magnitude. For instance, Betelgeuse looks brighter than Alnilam, but it is not. Alnilam is much farther from us.

  9. outer planets- the four planets of our solar system farthest from the Sun

  10. solar system- a Sun (star) and all the bodies in space that revolve around it The Kepler-30 solar system has a parent planet with three planets in orbital alignment circling it.

  11. star- a giant sphere of glowing gases Many people think our Sun is the biggest star. It’s not. There are many stars that are bigger than our Sun. Keep in mind that you can fit one million Earths in our Sun. Then notice the picture to the left. Our Sun is a tiny dot compared to the star known as VY Canis Majoris. Try to imagine how many planet Earths could fit inside it!

  12. Quiz Time! asteroid, comet, inner planets, light-year, magnitude, meteor, meteorite, meteoroid, outer planets, planet, solar system, star Which word means the four planets farthest from the Sun? outer planets

  13. Quiz Time! asteroid, comet, inner planets, light-year, magnitude, meteor, meteorite, meteoroid, outer planets, planet, solar system, star Which word means matter that made it to Earth’s surface from space? meteorite

  14. Quiz Time! asteroid, comet, inner planets, light-year, magnitude, meteor, meteorite, meteoroid, outer planets, planet, solar system, star Which word means a large body that revolves around a star? planet

  15. Quiz Time! asteroid, comet, inner planets, light-year, magnitude, meteor, meteorite, meteoroid, outer planets, planet, solar system, star Which word means a chunk of matter smaller than an asteroid orbiting the sun? meteoroid

  16. Quiz Time! asteroid, comet, inner planets, light-year, magnitude, meteor, meteorite, meteoroid, outer planets, planet, solar system, star Which word means the four planets closest to the Sun? inner planets

  17. Quiz Time! asteroid, comet, inner planets, light-year, magnitude, meteor, meteorite, meteoroid, outer planets, planet, solar system, star Which word means a chunk of matter that burns up in our sky (atmosphere)? meteor

  18. Quiz Time! asteroid, comet, inner planets, light-year, magnitude, meteor, meteorite, meteoroid, outer planets, planet, solar system, star Which word means the brightness of a star? magnitude

  19. Quiz Time! asteroid, comet, inner planets, light-year, magnitude, meteor, meteorite, meteoroid, outer planets, planet, solar system, star Which word means a small, orbiting body made of dust, ice, and frozen gases? comet

  20. Quiz Time! asteroid, comet, inner planets, light-year, magnitude, meteor, meteorite, meteoroid, outer planets, planet, solar system, star Which word means unit for measuring distances in space? light-year

  21. Quiz Time! asteroid, comet, inner planets, light-year, magnitude, meteor, meteorite, meteoroid, outer planets, planet, solar system, star Which word means a giant sphere of glowing gases? star

  22. Quiz Time! asteroid, comet, inner planets, light-year, magnitude, meteor, meteorite, meteoroid, outer planets, planet, solar system, star Which word means a star and all the bodies in space that revolve around it? solar system

  23. Quiz Time! asteroid, comet, inner planets, light-year, magnitude, meteor, meteorite, meteoroid, outer planets, planet, solar system, star Which word means a small, rocky object that orbits the Sun? asteroid

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