PDA

View Full Version : Strange planet is blacker than coal



ktlight
13th August 2011, 06:09
FYI:

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 kilometers (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 vaporized 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.
"However, it's not completely pitch black. It's so hot that it emits a faint red glow, much like a burning ember or the coils on an electric stove."

More than 500 extrasolar planets have been identified since 1995.
TrES-2b, like our Moon, is believed to be locked by gravitational tide, presenting only one face to its star.

The study, published in the RAS journal Monthly Notices, used NASA's orbiting Kepler spacecraft to make the observations.

source
http://www.tehrantimes.com/index.php/science/1463-strange-planet-is-blacker-than-coal

KosmicKat
13th August 2011, 13:49
I have heard about planets like this elsewhere, that reflect almost no detectable light. We can only hope that before too long it will be possible to investigate more closely; I believe first-hand observation from orbit might answer some very important questions.

passiglight
13th August 2011, 14:41
oh yeah right,they can spot this from lightyears away but they cannot see whats in front of their pointy faces

cosmic

steveofengland
13th August 2011, 16:12
They probably know Something is close, but they won't tell us until we can see it ourselves. Thanks ktlight I heard something in msm yesterday.

Lord Sidious
13th August 2011, 16:18
I have heard about planets like this elsewhere, that reflect almost no detectable light. We can only hope that before too long it will be possible to investigate more closely; I believe first-hand observation from orbit might answer some very important questions.

It's ok, we are onto it now.
Just exploring an ice planet nearby, then we will have a look.


http://www.theforce.net/swtc/Pix/dvd/zs/tesb/exechoth4.jpg

<8>
13th August 2011, 16:25
I have to say this like John Lear use to say: The only "Gas Giant" in our universe are NASA.

Maby it was something else..:P