Quarks to Quasars

The Strangest Alien Planets

1. The Smallest

This artist’s concept of Kepler-10b shows the smallest known exoplanet, announced in January 2011. [Full Story]

2. The Biggest

The largest exoplanet ever discovered is also one of the strangest and theoretically should not even exist, scientists say. Dubbed TrES-4, the planet is about 1.7 times the size of Jupiter and belongs to a small subclass of so-called puffy planets that have extremely low densities. The planet is located about 1,400 light years away from Earth and zips around its parent star in only three and a half days. [Full Story]

3. Hottest World

A planet called WASP-12b is the hottest planet ever discovered (about 4,000 degrees Fahrenheit, or 2,200 degrees Celsius), and orbits its star closer than any other known world. It orbits its star one every Earth day at a distance of about 2 million miles (3.4 million km). WASP-12b is a gaseous planet, about 1.5 times the mass of Jupiter, and almost twice the size. It is 870 light-years from Earth. [Full Story]

4. Most Habitable

One of the several planets within the Gliese 581 star system, called Gliese 581 d, may be one of the most potentially habitable alien worlds known. It is about 8 times the mass of Earth, and located in an orbit just right for liquid water to exist on the surface. Water is a key ingredient for life as we know it. Gliese 581 is a red dwarf star 20.5 light-years from Earth [Full Story]

5. Darkest Alien Planet TrES-2b

The distant exoplanet TrES-2b, shown here in an artist’s conception, is darker than the blackest coal. This Jupiter-sized world reflects less than one percent of the light that falls on it, making it blacker than any planet or moon in our solar system. It is 750 light-years from Earth. [Full Story]

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Posted on Friday, 15 June
Tagged as: astronomy   planets   science   Alien   cosmos   art   space  
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