• Sirius is 543,873 astronomical units away from Earth.

• It would take about 226,614 years to travel from Earth to Sirius in a spacecraft. 

Size

• Sirius is a blue-white star with a diameter of around 1.5 million miles.  

• Sirius 1.7 times the size of the Sun. 

• About 6.9 million Earths could fit inside Sirius. 

Shape 

• Sirius has a sphere (round) shape.

Light

• Sirius produces its own light. 

Temperature 

• The surface of Sirius has a temperature of about 17,432°F. 

• This is about 295 times hotter and the average temperature on Earth. 

• Sirius is the brightest star in Earth's night sky. 

• Sirius shines 25 times more brightly that the Sun.

• Sirius is a binary star system. This means two stars that orbit each other.  The star we can see from Earth is called Sirius or Sirius A. The second star called Sirius B can only be seen with very powerful telescopes. Sirius B is a white dwarf star that shines dimly and is even smaller than Earth.