Science4 FYC Ch1
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Science4 FYC Ch1

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Astronomy notes for Seton Science 4 FYC, Chapter 2

Astronomy notes for Seton Science 4 FYC, Chapter 2

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Science4 FYC Ch1 Science4 FYC Ch1 Presentation Transcript

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