Strange planet is blacker than coal

AFP ^ | August 11, 2011

[NYer]

A planet orbiting a distant star is darker than coal, reflecting less than one percent of the sunlight falling on it, according to a paper published on Thursday.

The strange world, TrES-2b, is a gas giant the size of Jupiter, rather than a solid, rocky body like Earth or Mars, astronomers said.

It closely orbits the star GSC 03549-02811, located about 750 light years away in the direction of the constellation of Draco the Dragon.

"TrES-2b is considerably less reflective than black acrylic paint, so it's truly an alien world," David Kipping of the Harvard-Smithsonian Center for Astrophysics said in a press release issued by Britain's Royal Astronomical Society (RAS).

First spotted five years ago, TrES-2b races around its star at a distance of just five million kilometres (three million miles).

This is scorchingly close when compared to Earth's 150-million-km (93-million-mile) distance from the Sun and Jupiter's 778 million kms (483 million miles).

So fierce is the heat that the exoplanet's atmosphere is cooked to more than 1,000 degrees Celsius (1,800 degrees Fahrenheit).

Signatures from its atmosphere point to the presence of light-absorbing chemicals like vaporised sodium and potassium or titanium oxide.

But none of these substances can explain the planet's darkness, which is more extreme than any planet or moon in our own Solar System.

"It's not clear what is responsible for making this planet so extraordinarily dark," said David Spiegel of Princeton University.

[TXnMA]

Next discovery: a high-energy laser or microwave beam from this planet to one parked in a far-out, frigid orbit.

Then we'll know we are looking at the ultimate solar energy absorber/converter. (...and realize that our technology is hopelessly outclassed...) ;-)

[blam]

WAD (We Are Doomed)