sci 7 eclipse

• Celestial sphere


  A tool of astronomers for tracking the movement of stars and other heavenly or celestial bodies
• Ecliptic


  The apparent path of the sun in the sky, or the celestial sphere as seen from earth
• Types of eclipses


  • Solar eclipse
  • Lunar eclipse
• Solar eclipse


  • Occurs when the moon aligns with the sun, causing the moon to partially or totally block your view of the sun
  • Is not seen all throughout the world, there are at least 2-5 solar eclipses around the world per year
  • For you to see a solar eclipse, the shadow of the moon has to cover the place where you are
• Umbra


  The darker inner shadow of the moon
• Penumbra


  The outer, less dark shadow
• Perigee


  The nearest position from earth
• Apogee


  The farthest position from earth
• Antumbra


  The less dark version of the umbra when the moon is at its apogee
• Types of solar eclipses

  • Total solar eclipse
  • Annular solar eclipse
  • Partial solar eclipse
• Total solar eclipse


  • Happens when the moon totally covers the sun and only the wispy corona around the sun can be seen
  • One of the rare solar eclipses
  • Can be seen from earth when the umbra hits the surface of earth on its path of totality
• Corona


  The outer atmosphere of the sun that is not often seen because of the intense energy released by the surface of the sun
• Annular solar eclipse


  • Is what people see on Earth when the moon's disk does not completely cover the sun during an eclipse
  • Moon-sun and earth are all aligned
  • You will also see an annulus or a ring of fire around the moon
• Partial solar eclipse


  • Happens when the moon is large enough to cover the whole sun
  • It thus covers only a part of the view of the sun
• Lunar eclipse


  • Occurs when the shadow of Earth covers the full moon, and the sunlight hitting the moon is blocked by Earth
• Types of lunar eclipses

  • Total lunar eclipse
  • Partial lunar eclipse
  • Penumbral lunar eclipse
• Total lunar eclipse


  • The moon is totally covered by the umbral shadow of earth
  • Happens during a full moon and only when the moon, sun and earth are aligned
• Partial lunar eclipse


  • The moon is full and is covered partially by the umbra
  • Happens when the moon-earth and sun are not entirely aligned
• Penumbral lunar eclipse


  • The actual eclipse may not be noticeable to the amateur or inexperienced astronomer
• Atmosphere


  What is the atmosphere?
• The atmosphere is divided into five different layers because the atmosphere is not uniform, its properties change with altitude
• Properties that change with altitude

  • Air pressure
  • Air temperature
• Aurora Borealis


  • Northern Lights in Sweden