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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?
Summer Solstice to Lammas Quiz
Try your hand at this quiz about the summer sky, space exploration, anniversaries and astronomical events. What are some of the highlights of the time between the June solstice and the harvest festival of Lammas on August 1st?
Greenwich - Peter Harrison Planetarium
Christopher Wren designed the Greenwich Royal Observatory in 1675. Two centuries later the Prime Meridian of the world, 0° of longitude, was established there. Besides its historical interest, the site is a leader in bringing astronomy to the public, in part through the Peter Harrison Planetarium.
Are There Solar Eclipses on the Moon
Total solar eclipse: the Sun a black circle framed by an ethereal corona. Dark enough to see stars, and for birds to go to sleep yet an eerie darkness unlike night. The Sun can also be eclipsed on other Solar System planets as long as they have moons. But what would we see from our own Moon?
Moons of Mars Facts for Kids
Earth's moon is the Moon because it was the only one humans had ever seen until 1610. That's when Galileo discovered moons orbiting Jupiter. By 1876 astronomers had found moons around all of the outer planets. So why did it take until 1877 for someone to find the moons of our neighbor Mars?
The Summer Triangle is a stellar treat for northern mid-latitudes summer sky watchers. It graces the sky all night long in summer, and its three bright stars are visible even in urban areas. Under dark skies you can also see the Milky Way within the asterism.
Valentina Tereshkova - the First Spacewoman
Three days orbiting Earth strapped into a space capsule so primitive that no one could land in it. So how did the cosmonaut get home? That's part of the story of the first woman in space, on a solo flight twenty years before NASA sent Sally Ride into orbit on a Space Shuttle.
Lacerta the Northern Stellar Lizard
Although the night sky has two lizards, the classical world wasn't enthralled by small reptiles. Both Lacerta and Chamaeleon constellations date from about the 17th century, which is considered modern. Lacerta is home to a fiery dwarf, a puffy planet and one of the most energetic known galaxies.
Beautiful Planet film review
The Milky Way contains billions of stars and planets, but Earth is to us the most beautiful. The thin skin of our atmosphere protects us from many space hazards, but can't protect life on Earth from human-made hazards. Tony Meyers's new film A Beautiful Planet 3D says only we can do that.
How does the composition of a star affect the temperature? In 1925 a young woman solved this puzzle in her doctoral thesis. Her analysis was a great breakthroughs in astrophysics. Otto Struve described it as the most brilliant Ph.D. thesis ever written in astronomy.
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