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Sirius
By: Michelle Confer
Characteristics
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Size- Sirius is about 2.1 times
the size of the sun.
Diameter- Sirius is about 1.8
million miles, where as the sun
is only about 870,000 miles.
Temperature- Sirius is 10,000
kelvin and the sun is only
5,777 kelvin.
Color- Sirius is white and the
sun is yellow (Sirius is much
hotter).
Distance from the sun (light
years)- Sirius is about 8.6 light
years away from the sun.
Sirius A in comparison to
the sun.
Sirius in the H-R Diagram
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Sirius a is a main
sequence star.
Sirius’s Contellation
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Sirius is mainly known as “the
dog star”, because it’s
constellation forms a dog in the
night sky. But the Greeks gave
this constellation the name
“The Scorcher”, because they
bieleved it was the reason
behind their very hot weather.
This constellation is also
known as “Canis Major”,
meaning big dog in English.
Life Cycle of Sirius
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Sirius is a binary star (a star system with two stars in it), because
Sirius has two stars in it’s system. There is a Sirius A and Sirius B.
Right now Sirius is a low mass/medium size star.
1.Sirius was born as a nebula
2. Then it became a low mass/medium sized protostar.
3.Then it went into what it is now; a low mass/medium size star.
4. Next it will become a red giant, then a planetary nebula.
5. After this it becomes a white dwarf.
6. Then finally it becomes black dwarf and dies off.
Works Cited