Science4 FYC Ch1

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Astronomy notes for Seton Science 4 FYC, Chapter 2

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Science4 FYC Ch1

  1. 1. Nicolaus Copernicus <ul><li>Catholic scientist </li></ul><ul><li>Called the “Father of Astronomy” </li></ul><ul><li>Copernicus believed correctly that the earth and planets revolve around the sun </li></ul>
  2. 2. Astronomy <ul><li>A science that studies the stars </li></ul><ul><li>People who study the stars are called astronomers </li></ul><ul><li>Do not confuse astrology (false science) with astronomy! </li></ul>
  3. 3. The Stars <ul><li>Stars are found all around the Universe. </li></ul><ul><li>Earth’s rotation makes the stars appear to move across the sky </li></ul><ul><li>Stars produce their own light </li></ul><ul><li>Planets & moon reflect the light of the sun </li></ul><ul><li>Movement of Earth’s atmosphere make the stars appear to twinkle </li></ul><ul><li>The sun is the closest star to Earth </li></ul>
  4. 4. Basic Star Colors <ul><li>White </li></ul><ul><li>Blue </li></ul><ul><li>Yellow </li></ul><ul><li>Orange </li></ul><ul><li>Red </li></ul>
  5. 5. Constellations <ul><li>Groups of stars that look like “connect the dot” pictures </li></ul><ul><li>Help astronomers describe where heavenly bodies are </li></ul><ul><li>Signs (map points) </li></ul><ul><li>Time- keepers </li></ul>
  6. 6. Galaxies <ul><li>Group of stars clumped together </li></ul><ul><li>Our solar system is in the Milky Way Galaxy </li></ul><ul><li>Most of the stars we can see belong to the Milky Way </li></ul><ul><li>The nearest galaxy to our own is possibly the Large Magellenic Cloud </li></ul>
  7. 7. The Sun <ul><li>The closest star to earth </li></ul><ul><li>So hot that everything is a gas </li></ul><ul><li>The sun’s gravity causes the planets to orbit it </li></ul><ul><li>All life depends on the sun </li></ul>
  8. 8. The Planets of our Solar System <ul><li>The “rock” planets are Mercury, Venus, Earth and Mars </li></ul><ul><li>The asteroid belt comes between Mars & Jupiter </li></ul><ul><li>The “gas giants” are Jupiter, Saturn, Uranus, and Neptune </li></ul><ul><li>Pluto (possibly not a planet) is the last and smallest </li></ul>
  9. 9. Comets <ul><li>Orbit the sun </li></ul><ul><li>Made of frozen gases </li></ul><ul><li>Have a really long tail of gases that escape </li></ul><ul><li>Tail always points away from the sun </li></ul><ul><li>Halley’s comet will appear again in 2062 </li></ul>
  10. 10. Meteors <ul><li>Fast-moving, bright object seen for a few minutes in the night sky </li></ul><ul><li>Small bodies that collide with earth </li></ul><ul><li>Friction of air causes them to glow </li></ul><ul><li>Sometimes called “shooting stars” </li></ul><ul><li>Usually burn up in the atmosphere </li></ul><ul><li>When they hit earth they are called a meteorite </li></ul>
  11. 11. The Asteroids <ul><li>Large rocky bodies that wander between the planets </li></ul><ul><li>Also called “minor planets” </li></ul><ul><li>Region called the Asteroid Belt found between Mars & Jupiter </li></ul>

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