Hottest known planet is discovered
To put things into perspective, 2040°C is hotter than the surface of some stars and hot enough to melt lead into a liquid and then boil it into a gas. Although the extremely close 2.9 day orbit is a major factor in the planet's temperature, for it to be as hot as it appears, it would have to absorb nearly all of the light that falls onto it - meaning the planet would appear blacker than charcoal.
The red tinge we see in the above image is due to the planet being so hot that it begins to glow slightly (like stars and hot metals), emitting huge amounts of infrared light in the process.
Another claim to fame for HD149026 is that it appears to be one of the densest gas-giant planets in existence, with an average of 5.5 metric tonnes of material per cubic metre. This is similar to the density of our own Earth and over 4 times that of the planet Jupiter. Astronomers were able to calculate the density of this distant planet (just 279 light-years away) because it transits in front of its parent star and allows us to measure its radius and mass, and hence to calculate its density.