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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.
Astronomy Fun on Bellaonline
Need a break from what you're doing? Want to test your astronomy vocabulary and knowledge? Find out about astronomy games, quizzes and jigsaws on BellaOnline.
Absolute Beginners - Observing the Moon
We take the Moon for granted, because it's so close to us and easy to see. But it's a beautiful and interesting object as it goes through its monthly changes. If you use a pair of binoculars, you can learn to recognize many of its main features. Some of them are visible without binoculars too.
Moon Facts for Kids
The Moon has no air, no sound, no weather and no liquid water. But you could see the Earth in the sky, shining more brightly than the Moon does from Earth. And since gravity is weaker, you could jump quite high and the footprint you left might last a million years.
Dark Matter - Poems of Space - book review
What do poets see when they look at the heavens? And astronomers? Are the experiences completely different or different sides of the same sense of wonder? This collection of poems, edited by a poet and an astrophysicist, is a treasure trove. There's something here for everyone.
Absolute Beginners - Seeing Mercury and Venus
We can see five planets with our unaided eyes. But people often ask how to find them and how to recognize them. Here is a beginner's guide for seeing Mercury and Venus.
Distances in Space
You wouldn't want to know the distance from Boston to San Francisco in inches. And for the same reason, miles aren't very useful in space. After all, it's 26 trillion miles to the next nearest star. So how do astronomers deal with these enormous distances?
Teaching Moon Phases and Eclipses
Why does the Moon seem to change shape? If eclipses happen when the Sun, Moon and Earth are all lined up, why don't they happen every month? If you're an educator, you may need to understand why and explain it to children. Here are some online resources to help you out.
One of the greatest astronomers of all time was a Danish nobleman with a metal nose, who was also a publisher, an alchemist and the Imperial Mathematician. His astronomical observations were the key to the modern view of the Solar System.
Boötes the Herdsman
This ancient constellation contains black holes as massive as a billion Suns, extrasolar planets and a meteor shower acquired from an extinct neighbor. Its brightest star, a red giant 25 times the diameter of the Sun, is a sign that spring is here.
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