New Frontiers in Astronomy by Elizabeth Schmermund

Author:Elizabeth Schmermund
Language: eng
Format: epub
Publisher: Cavendish Square Publishing, LLC

It would take forty more years for Zwicky’s hypothesis to be proved correct.

PROOF of DARK MATTER

Vera Rubin wanted to be an astronomer from when she was a little girl. As she grew older, she knew that this would be her career. This female astronomer in a field dominated by men at the time would go on to make one of the greatest astronomical discoveries ever.

Using a device called a spectrometer, which measures the properties of light that filters through it, she and a fellow astronomer named Kent Ford began studying the light that faraway stars emanated from different spiral galaxies in 1978. Like the astronomer Vesto Slipher had previously done, Rubin and Ford hoped to use the spectrometer to calculate the Doppler shifts of these galaxies. They hoped that they could further calculate the speed of stars in these galaxies using calculations derived from this instrument. They imagined that they would be able to make this calculation because the position of stars in galaxies would affect their velocity. Stars in the center of a galaxy should move faster than those at the outskirts of that galaxy because most of the mass and density would be located at the center, which would provide additional force the closer a star was to its center.

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