Space Chapter 7

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Space Chapter 7
2014-02-20 23:07:41
We made it

Space Chapter 7
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  1. Trans-Neptunian object
    Any object in the solar system which orbits the Sun at a greater distance than Neptune does.
  2. Meteorite
    A meteorite is a meteoroid which is large enough to pass throught the atmosphere of Earth and reach the ground without being burned up by the forces of friction.
  3. Meteor
    A meteoroid which hits the Earth's atmosphere and burns up.
  4. Meteoroid
    A meteoroid are small celestial body travelling in space ranging from the size of fust to 1m wide objects.
  5. Asteroid
    Celestial bodies which orbit the sun, are not spherical and are fairly large. They are found in belts also.
  6. Comet
    A celestial body which is made up of rock and mostly ice, also when near the Sun a tail of gas and dust particles form that points away from the Sun because of the solar wind which pushes it away.
  7. Heliocentric model
    The model of the solar system which states that the Sun is the center of the solar system and celestial bodies revolve around it.
  8. Geocentric model
    The model of the solar system which states that the Earth is the center of the solar system and celestial bodies revolve around it.
  9. Orbital radius
    The distance of a planet from its Sun.

    E.G The orbital radius of Earth is 1.00 AU
  10. Astronomical unit
    The distance from the Earth to the Sun which is 149 597 871 kilometers used instead of or with light-years .
  11. Retrograde Motion
    The movement of a celestial object in the direct opposite motion of something else. 
  12. Solar System
    A solar system is a star and all the objects orbiting it.

    E.G Our solar system has 8 planets. 
  13. Planets
    Spherical celestial bodies orbiting around 1 or more sun's which do not share orbits with other celestial bodies.

    Inner Planets: The planets Mercury, Venus, Earth, and Mars which are smaller, rocky and lie inside of the Asteroid Belt.

    Outer Planets:The planets Jupiter, Saturn, Uranus, and Neptune which are made of gas, larger and lie outside of the Asteroid Belt.
  14. Why do we have seasons?
    Earth has seasons because the planet revolves around the Sun and is tilted and rotates on its axis. This causes the Northern Hemisphere to get more direct Sunlight and become warmer when the Southern Hemisphere is cooler and receives sunlight at an angle which transfers less heat energy.
  15. Solar Eclipse
    An eclipse which occurs when the Sun is covered by the Moon as observed from Earth.
  16. Lunar Eclipse
    An eclipse which occurs when the Moon passes through into the Earth's shadow (umbra) .
  17. Phases Of The Moon
    The cycle in which the Moon is observed from Earth. 
  18. Tides
    The rise and falling of the seas caused by the attraction of the Moon and the Sun.
  19. Zenith
    The spot in the sky directly above an observer.
  20. Circumpolar
    A star or multiple stars which are observable all year round at certain latitudes.
  21. Pointer Stars
    Stars which act as refrences to locate other celestial object.

    E.G Dubhe and Merak to locate Polaris (The North Star)
  22. Asterism
    A star pattern made up of a constellation or multiple constellations.

    E.G Orion's belt, Big Dipper
  23. Apparent Magnitude
    The brightness of a star as seen from Earth.
  24. Light-year
    The distance that light travels in 1 year in a vacuum. 1 light year is approximately 9.4605284 × 10^15 meters
  25. Constellation
    88 groups of stars forming a recognizable pattern.

    E.G Orion, Ursa Minor
  26. Rotation
    The turing an object does around its axis.

    E.G Earth's rotation takes 24h
  27. Revolution
    The orbit of one object around another object 

    E.G Earth's revolution around the Sun.
  28. Astromomer
    A scientist who studies astronomy.

    E.G Neil Degrasse Tyson
  29. Celestial Object
    Objects that exist in space 

    E.G Planets, stars, moons, asteroids