Why is Sirius Important?

Artist's Impression of the Relative Sizes of Sirius A and Sirius B

The star Sirius is also known as the “Dog Star” by virtue of it being prominant in the constellation of Canis Major, or ‘Big Dog’ and is thought to be around 2–300 million years old It can be seen easily from the Northern Hemisphere by the naked eye between 30 and 73 degres of latitude and sometimes its luminosity is so great that it can be seen in daylight. About Canis Major Canis Major is one of the eighty-eight modern constellations and was included in the 2nd-century astronomer Ptolemy’s classification…

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