Tycho’s Nova, or SN 1572 was a type Ia supernova, first observed in November 1572, located about 8000 light-years away from Earth towards the northern constellation of Cassiopeia. The supernova, known as „stella nova“ (or the new star), was named after Tycho Brahe who studied the event extensively. The event lasted about 2 years and could be visible at daytime when it first appeared, with a maximum magnitude of -4, comparable in brightness to Venus. The remnant was discovered in the 1960s, confirming the type Ia classification. A type Ia supernova is the explosion of a white dwarf that accretes mass from a companion star beyond the limit of stability. The Chandra X-ray image shows high X-rays in blue for the blast wave, while low and medium energy X-rays, in red and green, reveal the explosion’s expanding debris.
Image credit: Chandra X-ray Telescope.
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