Star and Constellation Facts

Star and Constellation Facts

A star is a massive ball of plasma (very hot gas) held together by gravity. It radiates energy because of the nuclear reactions inside it. A constellation is a group of stars, usually in a recognizable shape or pattern. Together, the stars look like a picture. See the fact file below for more information about stars and constellations.

  • The star that is closest to the Earth is the sun.
  • A Star is a gigantic, glowing ball of plasma.
  • Stars are first formed as clouds of dust and gas.
  • Stars give off a tremendous amount of energy in the form of light and heat.
  • Most stars are between 1 billion and 10 billion years old.
  • Stars that have really strong gravity grow smaller over time and eventually turn into black holes.
  • The hottest stars give off a bluish light while the cooler stars give off a reddish light.
  • Stars seem to twinkle because their light travels through the earth’s atmosphere and the turbulence in the atmosphere affects the way stars are seen.
  • All the stars that make up the Milky Way Galaxy revolve around the center of the galaxy once every 200 million years or so.
  • The oldest star that has been discovered is HE 1523-0901, which is an estimated 13.2 billion years old.

Download the Stars and Constellations Study Pack

Included in this study pack:

  • Study guide and fact file
  • Fill in the blank quiz sheet
  • Word search
  • Crossword puzzle

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