Scientists Discover Alien "Super-Earth" Planet

A potentially habitable alien planet — one that scientists say is the
best candidate yet to harbor water, and possibly even life, on its
surface — has been found around a nearby star.

The planet is located in the habitable zone of its host star, which is a
narrow circumstellar region where temperatures are neither too hot nor
too cold for liquid water to exist on the planet's surface.

"It's the Holy Grail of exoplanet research to find a planet around a
star orbiting at the right distance so it's not too close where it would
lose all its water and boil away, and not too far where it would all
freeze," Steven Vogt, an astronomer at the University of California,
Santa Cruz, told SPACE.com. "It's right smack in the habitable zone —
there's no question or discussion about it. It's not on the edge, it's
right in there."

Vogt is one of the authors of the new study, which was led by Guillem
Anglada-Escudé and Paul Butler of the Carnegie Institution for Science, a
private, nonprofit research organization based in Washington, D.C.

"This planet is the new best candidate to support liquid water and,
perhaps, life as we know it," Anglada-Escudé said in a statement.


The researchers estimate that the planet, called GJ 667Cc, is at least
4.5 times as massive as Earth, which makes it a so-called super-Earth.
It takes roughly 28 days to make one orbital lap around its parent star,
which is located a mere 22 light-years away from Earth, in the
constellation Scorpius (the Scorpion).

"This is basically our next-door neighbor," Vogt said. "It's very
nearby. There are only about 100 stars closer to us than this one."

Interestingly enough, the host star, GJ 667C, is a member of a
triple-star system. GJ 667C is an M-class dwarf star that is about a
third of the mass of the sun, and while it is faint, it can be seen by
ground-based telescopes, Vogt said. [Gallery: The Strangest Alien
Planets]

"The planet is around one star in a triple-star system," Vogt explained.
"The other stars are pretty far away, but they would look pretty nice
in the sky."

The discovery of a planet around GJ 667C came as a surprise to the
astronomers, because the entire star system has a different chemical
makeup than our sun. The system has much lower abundances of heavy
elements (elements heavier than hydrogen and helium), such as iron,
carbon and silicon.

"It's pretty deficient in metals," Vogt said. "These are the materials
out of which planets form — the grains of stuff that coalesce to
eventually make up planets — so we shouldn't have really expected this
star to be a likely case for harboring planets."

The fortuitous discovery could mean that potentially habitable alien
worlds could exist in a greater variety of environments than was
previously thought possible, the researchers said.

"Statistics tell us we shouldn't have found something this quickly this
soon unless there's a lot of them out there," Vogt said. "This tells us
there must be an awful lot of these planets out there. It was almost too
easy to find, and it happened too quickly."

The detailed findings of the study will be published in the Astrophysical Journal Letters.


Another super-Earth that orbits much closer to GJ 667C was previously
detected in 2010, but the finding was never published, Vogt added. This
planet, called GJ 667Cb, takes 7.2 days to circle the star but its
location makes it far too hot to sustain liquid water on its surface.

"It's basically glowing cinders, or a well-lit charcoal," Vogt said. "We
know about a lot of these, but they're thousands of degrees and not
places where you could live."

But, the newly detected GJ 667Cc planet is a much more intriguing candidate, he said.

"When a planet gets bigger than about 10 times the size of the Earth,
there's a runaway process that happens, where it begins to eat up all
the gas and ice in the disk that it's forming out of and swells quickly
into something like Uranus, Jupiter or Saturn," Vogt explained. "When
you have a surface and the right temperature, if there's water around,
there's a good chance that it could be in liquid form. This planet is
right in that sweet spot in the habitable zone, so we've got the right
temperature and the right mass range."

Preliminary observations also suggest that more planets could exist in
this system, including a gas giant planet and another super-Earth that
takes about 75 days to circle the star. More research will be needed to
confirm these planetary candidates, as well as to glean additional
details about the potentially habitable super-Earth, the scientists
said.



To make their discovery, the researchers used public data from the
European Southern Observatory combined with observations from the W.M.
Keck Observatory in Hawaii and the new Carnegie Planet Finder
Spectrograph at the Magellan II Telescope in Chile.

Follow-up analyses were also made using a planet-hunting technique that
measures the small dips, or wobbles, in a star's motion caused by the
gravitational tug of a planet.

"With the advent of a new generation of instruments, researchers will be
able to survey many M dwarf stars for similar planets and eventually
look for spectroscopic signatures of life in one of these worlds,"
Anglada-Escudé said in a statement. Anglada-Escudé was with the Carnegie
Institution for Science when he conducted the research, but has since
moved on to the University of Gottingen in Germany.

With the GJ 667C system being relatively nearby, it also opens exciting
possibilities for probing potentially habitable alien worlds in the
future, Vogt said, which can't easily be done with the planets that are
being found by NASA's prolific Kepler spacecraft.

"The planets coming out of Kepler are typically thousands of light-years
away and we could never send a space probe out there," Vogt said.
"We've been explicitly focusing on very nearby stars, because with
today's technology, we could send a robotic probe out there, and within a
few hundred years, it could be sending back picture postcards."

Source

Trippy, but skepticism takes over everything in my mind -__-

i hope the Aliens look the aliens in the Aliens movie.

STRANGEgenius wrote:i hope the Aliens look the aliens in the Aliens movie.

we would be f***ed!

i'd get them to be my pet.

they are sexy.

What if there are already humans there and they built their own system like us..

King wrote:What if there are already humans there and they built their own system like us..

I would move into that world hoping that its ay better than this one

hopefully i find Strangeland ;)

Another one?