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The Cassini Mission to Saturn is one of NASA's best known undertakings. For nearly thirteen years it's sent images and data back from the ringed planet and its moons. But who was the Cassini who gave his name to the spacecraft?
Which 17th century brewer created ten new constellations? Johannes Hevelius, astronomer, civic leader, instrument-maker, writer, engraver and publisher. He died before finishing his great star atlas, so his wife Elisabetha - also an astronomer - finished the editing and oversaw its publication.
Johannes Kepler - His Life
Johannes Kepler gave the first accurate description of the Solar System. As he did his work, he struggled with poverty, insecurity and bereavement in troubled times. Religion and warfare were tearing Europe apart, but Kepler never gave up his quest to understand the cosmos.
John Herschel was the son of William Herschel, discoverer of the planet Uranus. But he earned his own reputation as an astronomer, mathematician, chemist, translator, artist, writer, and pioneer of photography. When he died he was laid to rest in Westminster Abbey near Sir Isaac Newton.
John Herschel – Facts for Kids
It can be hard to be the son of a famous man. Although his father was the first person in history to discover a planet, John Herschel had his own illustrious career. He was not only an astronomer, but also a brilliant mathematician, a talented artist, musician and poet, and a loving family man.
Jumbos of the Solar System
Our Solar System is full of wondrous things. Did you know that the mass of Jupiter is two and a half times greater than all the other planets put together? And which is the biggest moon, tallest mountain and biggest ocean? The answers may surprise you.
One planet in the Solar System dominates the others, so it's fitting that it's named for Jupiter, the king of the Roman gods. Jupiter has moons galore and monster storms, and it spins so fast that its day is only ten hours long.
Jupiter Facts for Kids
It's the king of the Roman gods and comet-killer, containing two and a half times the mass of all the other planets put together and with the shortest day of any planet in the Solar System. It's Jupiter! Find out more.
Jupiter's Galilean Moons
Four moons circling Jupiter. It was a sensation when Galileo discovered them in the early 17th century – and they're still sensational! One is bigger than a planet. Another seethes with volcanic activity and has mountains taller than Everest. And which one has an ocean that could harbor life?
Jupiter's Moons – Facts for Kids
Jupiter has at least 67 moons. Some of them are only half a mile long, but one is bigger than the planet Mercury. Which moon has hundreds of volcanoes, and which one has a deep ocean under an icy surface? Find out here.
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