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Great Debate (astronomy)

Great Debate (astronomy)

1920 debate between Harlow Shapley and Heber Curtis on whether there were other galaxies.

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  1. Pinwheel Galaxy

    Galaxy in the constellation Ursa Major.

    15%

  2. Harlow Shapley

    American scientist and political activist (1885–1972).

    13%

  3. Heber Doust Curtis

    American astronomer.

    11%

  4. Spiral galaxy

    Class of galaxy that has spiral structures extending from their cores.

    9.2%

  5. Cepheid variable

    Type of variable star that pulsates radially.

    6.6%

  6. Edwin Hubble

    American astronomer (1889–1953).

    5%

  7. Zone of Avoidance

    Area of sky obscured by the Milky Way.

    4.9%

  8. Galaxy

    System of stars and interstellar matter.

    4.2%

  9. Supernova

    Astrophysical phenomenon.

    3.4%

  10. Milky Way

    Galaxy containing the Solar System.

    2.8%

Readers come from

Share of the 3,210 readers arriving from another article

  1. Milky Way

    Galaxy containing the Solar System.

    56%

  2. Andromeda Galaxy

    Barred spiral galaxy in the Local Group.

    8.5%

  3. Nebula

    Body of interstellar clouds.

    4.7%

  4. Henrietta Swan Leavitt

    American astronomer (1868–1921).

    4.3%

  5. Heber Doust Curtis

    American astronomer.

    3.4%

  6. Center of the universe

    Historical concept in cosmology.

    2.6%

  7. Edwin Hubble

    American astronomer (1889–1953).

    2.6%

  8. Hubble's law

    Observation in physical cosmology.

    2.3%

  9. Timeline of knowledge about galaxies, clusters of galaxies, and large-scale structure

    2.3%

  10. Cepheid variable

    Type of variable star that pulsates radially.

    2.2%