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Moons of Mars - Deimos
By the late 19th century we knew Jupiter, Saturn, Uranus and Neptune had moons. But it seemed that there were no Martian moons. Then in 1877 American astronomer Asaph Hall surprised the world with two Martian moons. Why did it take so long to find them? And why did Hall call them Fear and Terror?
Tarantula Nebula – Facts for Kids
Arachnophobes needn't worry about this tarantula. It's not a big spider, it's a big nebula that looks a bit like a spider in some photos. It's also so far away that its light takes 170,000 years to get here. Stars are born there, stars die there, and it's a spectacular object.
Spring Triangle – a Seasonal Asterism
There are 88 official constellations covering the sky with no gaps or overlaps. There are also lots of asterisms, recognizable patterns of stars that aren't constellations. They have no official standing, but they have the advantage over many constellations of resembling what they represent.
Ultra-cool Dwarf and the Seven Planets
When a planet was first discovered around an alien sun in 1995, it was big news. Now we know thousands of them, so it takes something special to get into the news. In February 2017 one team hit the jackpot: a star with seven Earth-sized planets, three of them in the habitable zone.
Google doodles are little drawings and animations that incorporate the Google name into a presentation of a person or event of note. Here are five doodles with an astronomy theme, including asteroids, a lunar eclipse and how the speed of light was calculated by observing Jupiter and Io.
European Astrofest 2017
It was the 25th Astrofest – and how things have changed since the first one! No one knew then if other stars had planets. Pluto was still a planet and its discoverer Clyde Tombaugh was still alive. The Rosetta mission was in the very early planning stages, and Cassini-Huygens hadn't been launched.
Space Missions - Quiz
Space missions have taken us to the Sun and the Moon, asteroids and comets, planets, dwarf planets and moons, and looked beyond the Solar System. There have been so many missions it's hard to keep them straight. Can you match these descriptions with the missions?
Valentine's Day is no assurance that love is in the air. Hearts and flowers aren't guaranteed to come your way. You may or may not get one of the billion valentine cards that are sent each year. But heart shapes are everywhere and anyone can admire them. Here is a cosmic selection for everyone.
Makemake - Facts for Kids
Mike Brown, Chad Trujillo and David Rabinowitz discovered an icy object out in the Kuiper Belt nearly five billion miles from the Sun. Three years later the International Astronomical Union (IAU) listed it as a dwarf planet, and named it Makemake.
Tarantula Nebula (30 Doradus)
The biggest, brightest nebula in our galactic neighborhood is not for arachnophobes. It's a cosmic spider hundreds of light years across known as the Tarantula Nebula. Although the nebula is 170,000 light years away it's so luminous that it can be seen with the unaided eye.
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