The Hubble Space Telescope is named after Edwin Powell Hubble, the greatest North American astronomer of all time. Hubble (1889-1953) read Law and won a Rhodes Scholarship to Oxford U.K. where he joined Pershing's American Army in WW1 as a major. Hubble studied Cepheid variables in the spiral galaxies and measured the Andromeda Spiral at 900,000 light years distant, later corrected to 750,000 light years, however, Hubble determined distance was linked with recessional velocity. The Hubble constant relates the speed of recession of the galaxies to their distances from Earth.

Hubble Space Telescope

The Hubble Space Telescope orbits Earth at circa 600km altitude and since its launch in 1990 has thoroughly transformed mankind's knowledge of the universe.

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