how big is the brightest star

How Big is the Brightest Star

Sirius is the brightest star in the winter night sky of the ‘Northern Hemisphere’. Sirius is easily confused with Jupiter as the planet also glows brightly

Sirius is also known as:

  • Dog Star
  • Sirius A

Sirius A has a companion star Sirius B but the star that glows the brightest in our sky is Sirius A. Sirius A is 10,000 times brighter than Sirius B. 

How big is Sirius A

The Brightest Star in the universe has a Radius of 1.19million KM or 739,600 miles

How far is Sirius from Earth

Sirius is 8.6 million light-years from Earth.

Sirius VS the Sun

The Sun is a crucial element to our existence within this Galaxy but Sirius is 20 times brighter if placed side by side.

How to Find Sirius

Sirius is easy to find if you follow the three stars pointing to Earth of the constellation Orion. The Brightest Star is Sirius A.

  • Right ascension: 6 hours 45 minutes 8.9 seconds
  • Declination: -16 degrees 42 minutes 58 seconds

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