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What is the Kuiper Belt?

Dr. Mike Brown is a professor of planetary astronomy at Caltech. He's best known as the man who killed Pluto, thanks to his team's discovery of Eris and other Kuiper Belt Objects. We asked him to help us ...

dateJun 17, 2015 in Space Exploration
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Image: Messenger's iridescent Mercury

To the human eye, Mercury may resemble a dull, grey orb but this enhanced-colour image from NASA's Messenger probe, tells a completely different story. Swathes of iridescent blue, sandy-coloured plains and ...

dateJun 16, 2015 in Space Exploration
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What is Halley's Comet?

Halley's Comet, also known as 1P/Halley, is the most well known comet in the Solar System. As a periodic (or short-term comet) it has orbital period that is less than 200 years, and has therefore been observed ...

dateJun 15, 2015 in Space Exploration
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The moons of Jupiter

Jupiter was appropriately named by the Romans, who chose to name it after the king of the gods. In addition to being the largest planet in our Solar System – with two and a half times the mass of all the ...

dateJun 10, 2015 in Space Exploration
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Image: Tethys the target

Like most moons in the solar system, Saturn's moon Tethys is covered by impact craters. Some craters bear witness to incredibly violent events, such as the crater Odysseus (seen here at the right of the ...

dateJun 10, 2015 in Space Exploration
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Mercury sole survivor of close orbiting planets

The vast quantity of planets and planetary candidates identified by NASA's Kepler spacecraft has revealed an array of systems. Some have Jupiter-sized planets close to the Sun, while others show only a handful ...

dateJun 08, 2015 in Astronomy
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What was here before the solar system?

The solar system is old. Like, dial-up-fax-machine-old. 4.6 billion years to be specific. The solar system has nothing on the universe. It's been around for 13.8 billion years, give or take a few hundred ...

dateMay 29, 2015 in Astronomy
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How comets were assembled

Rosetta's target "Chury" and other comets observed by space missions show common evidence of layered structures and bi-lobed shapes. With 3D computer simulations Martin Jutzi of PlanetS at the University ...

dateMay 29, 2015 in Space Exploration
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