Once in a while, a star appears where there wasn't one before, fading away in days or weeks, showcasing the dynamic nature of stars.
'Guest stars,' like the one observed in 1054, illustrate the transient nature of stars, which brighten suddenly and fade away, challenging ancient beliefs of fixed stars.
Novae explosions, such as the one anticipated in 2024 with T CrB, offer a glimpse into stellar events, with T CrB projected to be visible but not as remarkable as historical occurrences.
Novae are associated with stellar explosions like those Tycho Brahe observed, showcasing diverse star life cycles dependent on their mass, with more massive stars resulting in supernova explosions.
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