THE EARTH IN THE SOLAR SYSTEM (G-1)

  • Star– a celestial body that has its own heat and light.
  • Celestial body– all objects that we can see in the sky.
  • Planet– a celestial body which revolves around a star in a orbit.
  • Satellite– a celestial body which revolves around a planet in a orbit.
  • Constellation– a group a several stars which formed a definite pattern in the sky is known as constellation.
  • Orbit– a definite elliptical path in which planet or satellite revolves.
  • Full moon night– a night when the moon is visible from the earth as a full sphere.
  • New moon night– every 15th night after the full moon night the moon is not visible in the sky, that is known as new moon night.
  • Geoid– the true shape of the earth.
  • Asteroids– tiny celestial bodies which moves between the Mars and the Jupiter.
  • Meteoroids– small pieces of rocks which move around the sun.
  • Galaxy– a collection of innumerable stars.
  • Universe– a largest unit in which a collection of galaxies exists.