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Halloween falls midway between an equinox and a solstice. In the ancient Celtic world it was the new year's eve and start of winter - time to prepare for survival in the darkening days. But also a time when the boundary between our world and the otherworld weakened. Who knew what might cross it?
Halley's Comet for Kids
It visits every 75 years or so, appearing like a celestial ghost in our skies. In the past it has been a bad omen and scary object, but last time it came it was a big event around the world. What is it? Halley's Comet, the most famous comet of all.
NASA Helped Rescue Chilean Miners
In the Chilean winter of 2010 thirty-three miners were trapped half a mile below the surface. They were in a hostile environment, a confined space, reliant on supplies from outside - similar to the problems of a space mission. Find out how NASA's decades of experience helped the Chilean rescuers.
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.
Bang! - The Universe Verse - book review
What would it take to explain the Big Bang Theory? James Lu Dunbar's "Bang!" might do it - and amuse you and your children at the same time. It's a splendid little book which tells the story of the universe in verse and appealing graphics.
Absolute Beginners - Autumn Skies
As the long days of summer slip away and the skies darken earlier, the first stars of autumn appear. The centerpiece is the Great Square of Pegasus. It's the key to other autumn sights, including the most distant object you can see without a telescope - it's a billion billion miles away.
Every 75 years or so a very special member of the Solar System swoops close to the Sun, becoming visible in our skies like a cosmic ghost. Read about Halley’s Comet, the most famous comet of all.
Absolute Beginners - Seeing Mars and beyond
Three beautiful planets - Mars, Jupiter and Saturn - are all visible to the unaided eye. If you have binoculars or a telescope, you can also see some of the moons and other features. Here's a beginner's guide to the planets which lie beyond Earth.
Jupiter Facts for Kids
It's the king of the Roman gods and comet-killer, containing two and a half times the mass of all the other planets put together and with the shortest day of any planet in the Solar System. It's Jupiter! Find out more.
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.
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