system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: the Sun was proven to be a star in the 19th century. Giordano Bruno was killed because he asserted this in the 15th century. So how did Dante get away with it in his final verse of the Divine Comedy "Love that moves the Sun and the other stars" dated 1320?
gpt
Bruno was burned for a whole list of heresies.  The sun being a star (the problem was not calling it a star,  but saying it was an ordinary star in an infinite universe) was not the worst one.  He also denied the Trinity, transubstantiation, and the virginity of Mary.  Bruno was a preacher with a following,  and was considered dangerous. 

Dante was a poet,  so he could always hide behind the excuse that his ideas were part of a fiction.  It should also be noted that Bruno was active during the counter-reformation, the Church's response to Martin Luther,  when they became very strict about heresy and opposition.   Throughout the middle ages, the church was actually much more permissive of free thought than you might expect. 

But when it comes to the sun thing,  he wasn't saying the same thing as Bruno.  When he says "the other stars," he actually means the planets.  Before the telescope (Galileo) the planets looked just like stars, except that they move independently.  They believed that the sky consisted of nine rotating spheres, containing (in order of distance from the earth) the moon,  Mercury,  Venus,  the sun,  Mars,  Jupiter,  Saturn,  and the "fixed stars" (the other planets hadn't been discovered yet). The stars are "fixed" because they all move together--now we know it only looks that way cause they're so far away.  Galileo was the first one to observe that Venus went through phases like the moon,  therefore the planets were solid bodies reflecting the Sun's light,  not producing their own.  He also discovered that Jupiter had moons, and he noticed Saturn's rings,  though through his telescope it looked like it just had one fixed moon on either side.