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Why the Sky Looks Blue
A sunny day with a beautiful blue sky may prompt a child to wonder why the sky is blue. It's a good question. After all, the Sun isn't blue, and even if the sky above us looks blue, the air around us doesn't. The answer has to do with sunlight, Earth's atmosphere, and our eyes.
Astronomy ABC - H for Herschel Space Observatory
The Herschel Space Observatory is the largest telescope ever sent into space. It's an infrared telescope named in honor of William Herschel who discovered infrared radiation, and his sister Caroline who worked with him. What's infrared? Who launched the telescope? What did we learn from it?
Enceladus 10 Amazing Facts
Saturn's moon Enceladus is a strange one. There are eruptions of cold volcanoes. This adds snow to a surface so bright it reflects 99% of the Sun's light, and supplies particles to maintain one of Saturn's rings. And does the moon harbor life in the salty ocean that lies under the ice?
Zodiac Constellations - Quiz
How well do you know the constellations of the zodiac? They are the oldest of the constellations. Here's a little quiz for you to test your knowledge. It's complete with answers and some additional facts about the zodiac constellations.
Astronauts in Memoriam
Traveling into space is an astronaut's dream. However it's a dangerous occupation, both in the realization and in the training. A number of astronauts, almost all American or Russian, have paid the ultimate price for their dreams. Where are their memorials?
Planets of the Solar System - Quiz
How well do you know the planets of the Solar System? Here's a beginner's quiz for you to test your knowledge. It's complete with answers and some more facts about the planets.
The women of Harvard Observatory worked hard for their meager wages. And the director wanted data processed, not theoretical work. Yet some of them made significant discoveries. One of the least known, but considered by some professional astronomers to be the most able, was Antonia Maury.
Coma Berenices Berenice's Hair
A dazzling queen of ancient Egypt was the inspiration for the constellation Coma Berenices. It's small and dim, but contains the Galactic North Pole and multitudes of galaxies.
Doodles for Women Astronomers
Since 2013 four outstanding women astronomers have been honored by a Google Doodle. None of the Doodles have had a worldwide reach, but there is a link to each delightful drawing and I've given some biographical details. Read on to meet this stellar quartet.
Transit of Mercury
No one alive had seen Venus transit when the 2004 one occurred. And if you missed that and the 2012 transit, there isn't another until 2117. However Mercury also transits the Sun and these transits happen more often. But what's a transit and what do we learn from it?
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