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Astronomy terms

Edwin Powell Hubble (1889-1953) Astronomy Hubble's law — considered the first observational basis for the expansion of the universe.

Concept of observable universe Astronomy Observable universe—depicted as a celestial sphere of the Universe that comprises all matter observed from Earth.

Ernst Mach (1838–1916) Austrian physicist and philosopher Astronomy Mach's Principle—states that all laws of physics are determined by the global distribution of matter.

Astronomy News Hubble Weighs in on Mass of Three Million Billion Suns, Jan. 16, 2018, by NASA, Editor: Karl Hille More news...

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