By: Sumedh Chilakamarri

Vocabulary to Know

Luminosity: The amount of energy released from a star due to nuclear fusion.

Absolute Magnitude: The magnitude(brightness) of a celestial(astronomical) object as it would be seen at a standard distance of 10 parsecs(Distance used in astronomy).

Apparent Magnitude: The magnitude of a celestial object as it is actually measured from Earth.

Solar Mass: The mass of a Sun used as a unit of mass.

Kelvin (K): The temperature scale used in astronomy. This is used because temperatures in space are more extreme.

GYR: Abbreviation for gigayear. Billions of years.

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The name of the star is Aldebaran. It comes from the Arabic word Al Dabaran(The follower). This is because it appears to follow the Pleiades through the night sky.




4010 K


Has a luminosity 425 times the Sun. 518 ± 32 L
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Apparent Magnitude


Absolute Magnitude


Distance From Earth

65.1 light years


Mass: 1.7 Solar Masses

50 times the size of our sun

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Spectral Classification


Age and Stellar Evolution Stage


Stellar Evolution Stage: Aldebaran is a giant star that moved off of its main sequence.;

Fun Facts

  • The brightest star in the constellation of Tarus and the 13th brightest star in the sky
  • 50 times the size of the Sun. Would almost fill out to the orbit of Mercury.
  • Star can be viewed only through October to March from northern latitudes.
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