The hottest-ever planet found by scientists so far is WASP 33 b orbiting a star some 380 light-years away in the constellation Andromeda.
The planet discovered in 2010 is a so-called hot Jupiter, a giant gas planet that has migrated very close to its star over time. Its temperature is estimated at a whopping 3,200 degrees Celsius. For comparison, the temperature of the hottest planet in the Solar System, Venus, is just 460 degrees Celsius.
WASP 33 b is described in a new paper submitted to Monthly Notices of the Royal Astronomical Society by astronomers from Keele University and the University of St Andrews in Scotland and also the Roque de los Muchachos Observatory in the Spanish Canary Islands.
|Mercury is closest to the sun, this is true. However, because of its proximity to the sun it lacks an atmosphere. Mercury’s gaseous molecules reached escape velocity long ago and the atmosphere was ‘burned off’ leaving a vacant wasteland of rock with a similar surface to the earth’s moon. There is nothing to hold in solar radiation, thus is flies out into space.
Venus is a different story. Its atmosphere is primarily composed of carbon dioxide – the primary green house gas -, which acts like a one-way door. The solar heat enters, but it cannot leave. Thus, an oven is created. This is why Venus has no water. Pictures suggest that Venus once had an aqueous environment, but because of climatic changes and intense heat…. it evaporated.
Also, because of an overactive core, Venus seems to recreate its continents every X years. So, we do not expect to find fossils or many bacteria.