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Royal Greenwich Observatory Photography 2010
An ancient tree is young compared to the center of the Galaxy. The Sun shines through dark clouds as a perfect ring in an annular eclipse. These are two of the dazzling images in the Astronomy Photographer of the Year competition 2010.
Royal Observatory Cape of Good Hope
Why did the British government in 1820 want to build an astronomical observatory eight thousand miles from home? Which astronomers are buried on the premises and which one went home after a year in the "dismal swamp"? Here are some of the stories of the Royal Observatory at the Cape of Good Hope.
Royal Observatory Greenwich
It's the place where time begins: The Royal Observatory, Greenwich, England. Here you can stand on the Prime Meridian of the world with one foot in the western hemisphere and the other in the eastern hemisphere. It represents over three hundred years of astronomical and maritime history.
Sagittarius the Archer
In northern hemisphere summer, the ancient zodiac constellation Sagittarius stands low on the southern horizon. It's a special constellation, for when you see Sagittarius, you're looking into the heart of the Milky Way.
Saint Patrick's Day – Wearing the Cosmic Green
Saint Patrick's Day is associated with the shamrock and the color green. Although there don't seem to be any cosmic shamrocks, there are many green phenomena in the skies. Discover a beautiful green nebula, what excites electrons and why con men sold “comet pills”.
Saturn Facts for Kids
Saturn is golden in the sky, and a telescope shows a ring system to take your breath away. If you could find enough water Saturn would float, and its moons are amazing. But if you don't like freezing weather, 1000-mph winds and lightning storms the size of continental USA, don't plan any visits.
Saturn's Moons – Facts for Kids
Everybody recognizes Saturn's rings, but that isn't all that orbits the planet. There are shepherd moons, a moon with cold volcanoes erupting, a planet-sized moon, and more. It took nearly two hundred years for the first seven known moons to get names.
Scale of the Universe 2 - website
How big is the Universe? And how small? This website takes you from yoctometers - unbelievably small - to yottameters – just as unbelievably big. Navigate up or down from the human scale, with drawings and diagrams that make sense of the numbers. A great tour for everyone.
Science Fair Astronomy Projects
Attention, educators and students! Need help with astronomy ideas for a science fair? Wonder about how to do a project or investigation? Here are some useful sites with suggestions for astronomy-themed projects, as well as plenty of how-to on researching and presenting work.
Scorpius the Scorpion
Anyone wary of spiders may want to avoid the spider's cousin Scorpius. Most constellations don't look like their namesakes. But Scorpius is easily imagined as a giant scorpion with a blood red heart gleaming in the southern sky. It's been an astronomical scorpion for over 3000 years.
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