Planet UCF 1.01, is an “exoplanet” orbiting a red dwarf star called GJ 436, about two-thirds the size of Earth and only 33 light years distant. It appears as if it is covered in molten lava.
“Cosmically speaking, that’s right around the corner,” said discoverer Kevin Stevenson, though that works out to 194 trillion miles.
Exoplanets circle stars beyond our Sun, but only a handful smaller than Earth have been discovered, according to NASA. UCF 1.01 is about 5,200 miles in diameter, slightly bigger than Mars, smaller than Venus.
It’s so close to its star – GJ 436 is about half the size of our Sun – that it revolves about it when every 1.4 days (about 33 1/2 hours.) It’s so hot – at least 1,000 degrees Fahrenheit – that it has no atmosphere and may have a molten surface.
The news is expected to generate international buzz among astronomers and physicists, both simply because of the way Stevenson and his colleagues discovered it, and since of exactly where they had been seeking when they did, said Michael Werner, project scientist at NASA’s Jet Propulsion Laboratory in California.
He and other scientists at UCF’s Planetary Sciences Group were utilizing the NASA Spitzer Space Telescope, an infrared space telescope launched into orbit about the sun from Cape Canaveral in August 2003. That telescope was designed and is employed mostly to study planets and other space objects that already have been discovered, or to look into deep, deep space.
UCF 1.01 is the first planet actually discovered by Spitzer.
Sources and more information:
• Spitzer Finds Possible Exoplanet Smaller Than Earth
Astronomers using NASA’s Spitzer Space Telescope have detected what they believe is an alien world just two-thirds the size of Earth – one of the smallest on record. The exoplanet candidate, known as UCF-1.01, orbits a star called GJ 436, which is located a mere 33 light-years away. UCF-1.01 might be the nearest world to our solar system that is…
• Exoplanet smaller than Earth, only 33 light-years away
Most worlds orbiting distant suns are larger than Earth. It makes sense we’d see the biggest ones first. But today (July 18, 2012), astronomers using NASA’s Spitzer Space Telescope and at the University of Central Florida announced the possible detection of an exoplanet only two-thirds the size of Earth, orbiting the red-dwarf star GJ 436, just…
• Possible Alien Planet Smaller Than Earth May Be Lava World
• Spitzer Discovers Exoplanet Smaller than Earth