Dad-stronomy 101: Sirius


Location: Canis Major Constellation (Greater Dog)

Classification: Spectroscopic Binary

Distance: ~9 light-years

Alternate Names: “Dog Star”

Apparent Magnitude: -1.5

Meaning of Name: Greek for “scorcher” or “glowing”

Fun Facts:

  • brightest star in Earth’s night sky
  • is actually a binary star (Sirius A, Sirius B)
  • Sirius A is twice as massive as the Sun
  • will continue to be the brightest star in the Earth’s sky for the next 210,000 years
  • Is twice as bright as Canopus, the next brightest star
  • Sirius, along with Procyon and Betelgeuse, form the Winter Triangle

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