Astronomer Annie Jump Cannon

Annie Jump Cannon, nicknamed the "Census Taker of the Sky," was born December 11, 1863. This trailblazing astronomer is known for her work classifying the stars.

Star Classification - Sixty Symbols


Key Facts In This Video

  • 1

    Originally, stars were classified based on a brightness rating, with one being very bright and 5 being very dim. (1:01)

  • 2

    Temperature is one of the most important properties to consider when classifying. (4:13)

  • 3

    The Earth's sun ranges right in the middle of temperature, mass and brightness when compared to other stars we know of. (6:07)

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