Most stars exist in binary or triple star systems. It is hypothesized that up to 85% of stars are gravitationally bound to another star in a multiple star system. Therefore, solitary stars (such as the Sun) are actually not the norm in the universe, but in fact are a rarity.
The Greeks had proposed heliocentrism 2000 years before Copernicus: Aristarchus arranged the planets in order of distance from the Sun, concluding that it could not be in orbit around the Earth because a body that large could not orbit a body so small.
Spaghettification is a term specifically used in astrophysics to describe death from falling into a black hole.