L3 Stars & Constellation

• It is a massive ball of plasma that emits light

  throughout the universe. It is a huge sphere of very hot glowing gas

  A star
• What is the closest and brightest star to Earth?

  The Sun
• How many stars are there in the galaxy?

  Approximately 400 billion. And about 170 million galaxies
• The lower the magnitude...


  the brighter the star
• What is the temperature of a Proxima Centauri (red star)?

  2,300C [coldest]
• What is the temperature of Alnilam (blue star)?

  27,000C [hottest]
• _______ are a group of stars forming a pattern or a definite shape

  Constellations
• How many constellations are there in space?

  88. 44 in the Northern and Southern sky of the equator
• Constellations help stargazers and astronomers recognize specific stars in the night sky
• Constellations were used to create and track the calendar so they knew when to plant crops and harvest them