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Greenwich - Peter Harrison Planetarium
Christopher Wren designed the Greenwich Royal Observatory in 1675. Two centuries later the Prime Meridian of the world, 0 degrees of longitude, was established there. Besides its historical interest, it's a leader in bringing astronomy to the public, in part via the Peter Harrison Planetarium.

Are There Solar Eclipses on the Moon
Total solar eclipse: the Sun a black circle framed by an ethereal corona. Dark enough to see stars, and for birds to go to sleep – yet an eerie darkness unlike night. The Sun can also be eclipsed on other Solar System planets as long as they have moons. But what would we see from our own Moon?

Moons of Mars - Facts for Kids
Earth's moon is “the Moon” because it was the only one humans had ever seen until 1610. That's when Galileo discovered moons orbiting Jupiter. By 1876 astronomers had found moons around all of the outer planets. So why did it take until 1877 for someone to find the moons of our neighbor Mars?

Summer Triangle
The Summer Triangle is a stellar treat for northern mid-latitudes summer sky watchers. It graces the sky all night long in summer, and its three bright stars are visible even in urban areas. Under dark skies you can also see the Milky Way within the asterism.

Valentina Tereshkova - the First Spacewoman
Three days orbiting Earth strapped into a space capsule so primitive that no one could land in it. So how did the cosmonaut get home? That's part of the story of the first woman in space, on a solo flight twenty years before NASA sent Sally Ride into orbit on a Space Shuttle.

Lacerta - the Northern Stellar Lizard
Although the night sky has two lizards, the classical world wasn't enthralled by small reptiles. Both Lacerta and Chamaeleon constellations date from about the 17th century, which is considered modern. Lacerta is home to a fiery dwarf, a puffy planet and one of the most energetic known galaxies.

Beautiful Planet - film review
The Milky Way contains billions of stars and planets, but Earth is to us the most beautiful. The thin skin of our atmosphere protects us from many space hazards, but can't protect life on Earth from human-made hazards. Tony Meyers's new film A Beautiful Planet 3D says only we can do that.

Cecilia Payne-Gaposchkin
How does the composition of a star affect the temperature? In 1925 a young woman solved this puzzle in her doctoral thesis. Her analysis was a great breakthrough in astrophysics. Otto Struve described it as “the most brilliant Ph.D. thesis ever written in astronomy.”

Ptolemy and the Butterfly - M7 and M6
The objects in the Messier catalog that are the farthest south are two star clusters. M6 is also called the Butterfly Cluster and M7 is also known Ptolemy's Cluster. They're splendid objects seen in their glory in the southern skies, but if you live in the far north you can't see them at all.

Chamaeleon - the Southern Stellar Lizard
Chamaeleons lived in lands exotic to 16th-century Europeans. Yet although color-changing lizards are fascinating, Chamaeleon the constellation is a small, dim southern sky constellation with no associated mythology. Why does it even exist? Is there anything of interest there?

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