Scientists find Earth-like planet

[puzzle man]

was listening to the BBC this morning 97.7FM and thay were saying that Scientists have find an Earth-like planet.

thought it was interesting.

so i did some searching and....

video.....http://news.bbc.co.uk/1/hi/help/3681938.stm

Scientists find Earth-like planet

Scientists have discovered the most Earth-like planet ever seen close to the centre of the Milky Way.

The planet shows similarities to earth because it's cool and made of rock and ice but conditions there are thought to be too cold for life to survive.

It shares the same galaxy as Earth but is three times further away from its sun than the Earth is from our sun.

Experts say it shows planets like Earth are more common than we thought and we may not be alone in the universe.

The planet goes by the complicated name OGLE-2005-BLG-390Lb. Temperatures on the planet are thought to be around minus 220 degrees Celsius which means its surface could be a layer of frozen liquid. It has a rocky core and thin atmosphere like earth but a much bigger orbit.

From CNN..

European astronomers have found the most Earth-like planet outside our solar system, and here's what it might be like to live there:

The "sun" wouldn't burn brightly. It would hang close, large and red in the sky, glowing faintly like a charcoal ember. And it probably would never set if you lived on the sunny side of the planet.

You could have a birthday party every 13 days because that's how fast this new planet circles its sun-like star. But watch the cake -- you'd weigh a whole lot more than you do on Earth. (Learn more about exoplanets)

You might be able to keep your current wardrobe. The temperature in this alien setting will likely be a lot like Earth's -- not too hot, not too cold.

And that "just right" temperature is one key reason astronomers think this planet could conceivably house life outside our solar system. It's also as close to Earth-sized as telescopes have ever spotted. Both elements make it the first potentially habitable planet besides Earth or Mars.

Astronomers who announced the discovery of the new planet Tuesday say this puts them closer to answering the cosmic question: Are we alone?

"It's a significant step on the way to finding possible life in the universe," said University of Geneva astronomer Michel Mayor, one of 11 European scientists on the team that found the new body. "It's a nice discovery. We still have a lot of questions."

There's still a lot that is unknown about the new planet, which could be deemed inhospitable to life once more is learned about it. But as galaxies go, it's practically a neighbor. At only 120 trillion miles away, the red dwarf star that this planet circles is one of the 100 closest to Earth.

The results of the discovery have not been published but have been submitted to the journal Astronomy and Astrophysics.

Alan Boss, who works at the Carnegie Institution of Washington where a U.S. team of astronomers competed in the hunt for an Earth-like planet, called it "a major milestone in this business."

The planet was discovered by the European Southern Observatory's telescope in La Silla, Chile, which has a special instrument that splits light to find wobbles in different wavelengths. Those wobbles can reveal the existence of other worlds.

What they revealed is a planet circling the red dwarf star, Gliese 581. Red dwarfs are low-energy, tiny stars that give off dim red light and last longer than stars like our sun. Until a few years ago, astronomers didn't consider these stars as possible hosts of planets that might sustain life.

The discovery of the new planet, named 581 c, is sure to fuel studies of planets circling similar dim stars. About 80 percent of the stars near Earth are red dwarfs.

The new planet is about five times heavier than Earth, and gravity there would be 1.6 times as strong as Earth's. Its discoverers aren't certain if it is rocky like Earth or if its a frozen ice ball with liquid water on the surface. If it is rocky like Earth, which is what the prevailing theory proposes, it has a diameter about 11/2 times bigger than our planet. If it is an iceball, as Mayor suggests, it would be even bigger.

Based on theory, 581 c should have an atmosphere, but what's in that atmosphere is still a mystery and if it's too thick that could make the planet's surface temperature too hot, Mayor said.

However, the research team believes the average temperature to be somewhere between 32 and 104 degrees and that set off celebrations among astronomers.

Until now, all 220 planets astronomers have found outside our solar system have had the "Goldilocks problem." They've been too hot, too cold or just plain too big and gaseous, like uninhabitable Jupiter.

The new planet seems just right -- or at least that's what scientists think.

"This could be very important," said NASA astrobiology expert Chris McKay, who was not part of the discovery team. "It doesn't mean there is life, but it means it's an Earth-like planet in terms of potential habitability."

Eventually astronomers will rack up discoveries of dozens, maybe even hundreds of planets considered habitable, the astronomers said. But this one -- simply called "c" by its discoverers when they talk among themselves -- will go down in cosmic history as No. 1.

Besides having the right temperature, the new planet is probably full of liquid water, hypothesizes Stephane Udry, the discovery team's lead author and another Geneva astronomer. But that is based on theory about how planets form, not on any evidence, he said.

"Liquid water is critical to life as we know it," co-author Xavier Delfosse of Grenoble University in France, said in a statement. "Because of its temperature and relative proximity, this planet will most probably be a very important target of the future space missions dedicated to the search for extraterrestrial life. On the treasure map of the Universe, one would be tempted to mark this planet with an X."

Other astronomers cautioned it's too early to tell whether there is water.

"You need more work to say it's got water or it doesn't have water," said retired NASA astronomer Steve Maran, press officer for the American Astronomical Society. "You wouldn't send a crew there assuming that when you get there, they'll have enough water to get back."

The new planet's star system is a mere 20.5 light years away, making Gliese 581 one of the 100 closest stars to Earth. It's so dim, you can't see it without a telescope, but it's somewhere in the constellation Libra, which is low in the southeastern sky during the mid-evening in the Northern Hemisphere.

Even so, Maran noted, "We don't know how to get to those places in a human lifetime."

But, oh, the view, if you could. The planet is 14 times closer to the star it orbits. Udry figures the red dwarf star would hang in the sky at a size 20 times larger than our moon. And it's likely, but still not known, that the planet doesn't rotate, so one side would always be sunlit and the other dark.

Two teams of astronomers, one in Europe and one in the United States, have been racing to be the first to find a planet like 581 c outside the solar system.

The European team looked at 100 different stars using a tool called HARPS (High Accuracy Radial Velocity for Planetary Searcher) to find this one planet, said Xavier Bonfils of the Lisbon Observatory, one of the co-discoverers.

Much of the effort to find Earth-like planets has focused on stars like our sun with the challenge being to find a planet the right distance from the star it orbits. About 90 percent of the time, the European telescope focused its search more on sun-like stars, Udry said.

A few weeks before the European discovery earlier this month, a scientific paper in the journal Astrobiology theorized a few days that red dwarf stars were good candidates.

"Now we have the possibility to find many more," Bonfils said.

Now all someone has to do is make a spaceship that can go the speed of light so i can go

Edited April 26, 2007 by puzzle man

[saintly]

don't really understand how this planet is "earth-like" considering you'll be frozen when you step out

[puzzle man]

The new planet is 14 times closer to Gliese 581 than Earth is to the sun. But because Gliese 581 is so cool, the planet is not scorched by solar radiation. It zips around the star at express speed, making just 13 days to complete an orbit.

"We have estimated that the mean temperature of this super-Earth lies between 0 and 40 degrees Celsius, and water would thus be liquid,'' said lead researcher Stephane Udry of Switzerland's Geneva University.

[Dead]

ice and water must = a breathable atmosphere

or am I wrong?

Awesome find dude. I'm always into this sort of stuff. I think we're ignorant if we think we are the only sentient life in the universe lol.

Just thinking of the universe and it's uncalcuable boundry makes my head explode sometimes.

[CAP]

Reading it this morning I thought it was pretty funny that Scientists have been looking so far deep into outer space for such a planet and now find this one relatively close, just outside our solar system according to the articles.

[Dead]

Reading it this morning I thought it was pretty funny that Scientists have been looking so far deep into outer space for such a planet and now find this one relatively close, just outside our solar system according to the articles.

That is interesting dude. I guess they were under the assumption that the first place to look is the farthest away lol.

Man this is exciting for me. I'm such a nerd sometimes haha.

[saintly]

The planet goes by the complicated name OGLE-2005-BLG-390Lb. Temperatures on the planet are thought to be around minus 220 degrees Celsius which means its surface could be a layer of frozen liquid. It has a rocky core and thin atmosphere like earth but a much bigger orbit.

I was referring to the quote above when I made the "frozen" statement.

[Dead]

Oh well at least it's breathable.

Not like Uranus BAAHAHAHA.

Sorry...I'll go now :(