Giovanni Cassini was born in Perinaldo, in what is now Italy, on June 8, 1625. Early work on Jupiter and Mars’ rotational periods and the positions of Jupiter’s satellites led to an invitation to ...

Add Yahoo as a preferred source to see more of our stories on Google. On Dec. 31, 2004, NASA’s Cassini spacecraft flew by Iapetus, Saturn’s third largest moon. Iapetus was discovered by the Italian ...

Jupiter’s Great Red Spot was first discovered in 1665 by astronomer Giovanni Domenico Cassini, and both scientists and the public have been awe-stricken by its beauty and the processes that created it ...

The planet Jupiter is particularly known for its so-called Great Red Spot, a swirling vortex in the gas giant’s atmosphere that has been around since at least 1831. But how it formed and how old it is ...

Add Yahoo as a preferred source to see more of our stories on Google. On Dec. 23, 1672, Italian astronomer Giovanni Cassini discovered Rhea, Saturn’s second-largest moon. Rhea is made up of rock and ...