The astronomer who used parallax to show that the supernova of 1572 occurred at a large distance from Earth was:

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Tycho Brahe was the astronomer who used parallax to show that the supernova of 1572 was at a large distance from Earth. This observation was significant in challenging the Aristotelian idea of the immutability of the celestial sphere and contributed to the development of modern astronomy.

The Astronomer Who Used Parallax to Show That the Supernova