July 21, 2024 — Europa and Enceladus, icy moons of Jupiter and Saturn respectively, have evidence of oceans beneath their crusts. A NASA experiment suggests -- if these oceans support life ...
Jupiter and its four planet-size moons, called the Galilean satellites, were photographed by Voyager 1 and assembled into this collage. They are not to scale but are in their relative positions.
Using his celestial observations, including the discovery of Jupiter’s satellites, Galileo came up with a book titled Siderius Nuncius (The Starry Messenger) in March 1610. In this work ...
Four days later, he observed a fourth point of light near the planet with the same unusual behavior. By Jan. 15, Galileo correctly concluded that he had discovered four moons orbiting around Jupiter, ...
A massive volcano on Jupiter's moon, Io is more powerful than all of Earth's power stations combined - says American space agency, Nasa. The huge volcano was recently detected during flyby of the Juno ...
7, 1610 - 415 years ago from Tuesday - by discovering the existence of Jupiter's moons. His discovery advanced Nicolaus Copernicus' theory that cosmic objects did not revolve around the Earth.