Topic
History of astronomy
2 questions tagged History of astronomy — spanning every one of the seven Ws.
when
When was the first solar system model with planets discovered to be a ringed giant?
Saturn’s rings were first clearly seen by Galileo in 1610, although he did not understand what they were.
SpaceHistory of astronomy
how
How did Neptune discoverers find the planet without seeing it first?
They predicted Neptune's position from irregularities in Uranus's orbit and then observed it near the predicted spot in 1846.
SpaceHistory of astronomy