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Red Dwarfs - Ten Facts for Kids
If you go outside on a clear dark night, you might see a few thousand stars. But without a telescope, not a single one will be the most common type of star in the Universe. You won't see red dwarfs, the stars that will still be shining in the far distant future when all the others have died.
Rhea - Saturn's Moon Facts for Kids
Even being Saturn's second biggest moon doesn't make Rhea very big. You could fit three Rheas across the USA and still have room left over. It whizzes around Saturn in four and a half days, making for very short months. It's so cold there that ice is literally as hard as rock.
Rhea Moon of Saturn
Rhea was Saturn's wife in classical mythology. Rhea the moon zips around Saturn in four and a half days. Although it has an oxygen atmosphere, we won't be moving there anytime soon. Even in direct sunlight, it's -281 degrees Fahrenheit and the "atmosphere" is similar to a vacuum on Earth.
Rose Center and Hayden Planetarium
One of the world's leading planetariums, located in one of the world's premier museums in one of the world's great cities. It's the Hayden Planetarium in New York City. The old Hayden Planetarium was razed in 1997, to many people's sorrow. But the new one opened in 2000 and it is stunning.
Rosetta the Comet Chaser
Rosetta, the European Space Agency (ESA) spacecraft, traveled for ten years and billions of miles in order to rendezvous with a comet, accompany it as it moves into the inner Solar System, and deploy a lander.
Rosetta's Story – Facts for Kids
It's gone where no space mission has been before! Rosetta caught up with a comet in deep space and went into orbit around it. The lander Philae was the first ever to land on a comet. Read the story so far and watch out for new developments.
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.
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