Gliese 581g - Page 6 - Orbiter-Forum

RisingFury · 10-20-2010, 06:37 AM

Quote:

Ragbir Bhathal, a scientist at the University of Western Sydney, claimed to have detected a suspicious pulse of light nearly two years ago, that came from the same area of the galaxy as the location of Gliese 581g, according to the U.K.'s Daily Mail online.

Don't trust Daily Mail when it comes to science. They have a high track record of misunderstanding what papers mean, then inventing a sensationalist claim, then years later they turn around to fight the hype they started...

Unstung · 07-20-2012, 08:55 AM

Apparently the planet has been confirmed to likely exist according to Universe Today, but I can't find many other sources. They don't seem very trustworthy. I wonder if more sources will report on it in the coming days.

Universe Today: "Exoplanet Gliese 581g Makes the Top 5"

University of Puerto Rico at Arecibo: "Five Potential Habitable Exoplanets Now"

Quote:

Now the original discoverers of Gliese 581g, led by Steven S. Vogt of UC Santa Cruz, present a new analysis with an extended dataset from the HARPS instrument that shows more promising evidence for its existence. The new analysis strength their original assumption that all the planets around Gliese 581 are in circular and not elliptical orbits as currently believed. It is under this likely assumption that the Gliese 581g signal appears in the new data.

Another source - Herald Sun: "SUPER EARTH: Scientists discover life-supporting planet 'right at Earth's front door'"

RisingFury · 07-20-2012, 10:08 AM

Quote:

Originally Posted by tblaxland

Tidally locked could be a good thing:

http://www.space.com/scienceastronom...le-100929.html

EDIT: FWIW, from what I can find about the physical size, surface gravity would range from 1.5g to 2.8g

Any tidally locked system also tends to decrease the orbital eccentricity. Obviously that helps to stabilize the climate because you have no instances of increasing and decreasing solar flux and because you have no summer and winter cycles.

Keatah · 07-20-2012, 09:13 PM

It would be interesting to see what sort of evolution happens on a tidally locked planet..

You might get strong winds on the terminator. And dwellings for creatures might be aerodynamic. This is assuming the atmosphere rises on the hot side and condenses on the cold side.

This convection action might take all the water and deposit it as snow on the dark side. Could that cause an imbalance and cause some type of super-long-term precession as weighty snow deposits on one side? How would that effect tidal lock?

What kinds of politics and society would develop in a narrow habitable band?

Would the habitable band be variable based on the solar fluctuations? More variable than on earth? Might it move back and forth between hot side and cold side?

How would a culture develop religions? And what about space travel? Would they have a more difficult time than galileo or copernicus and kepler in figuring out how their solar system works?

07-20-2012, 08:55 AM	#77
Unstung Bill Nye's Space Club Member	Apparently the planet has been confirmed to likely exist according to Universe Today, but I can't find many other sources. They don't seem very trustworthy. I wonder if more sources will report on it in the coming days. Universe Today: "Exoplanet Gliese 581g Makes the Top 5" University of Puerto Rico at Arecibo: "Five Potential Habitable Exoplanets Now" Quote: Now the original discoverers of Gliese 581g, led by Steven S. Vogt of UC Santa Cruz, present a new analysis with an extended dataset from the HARPS instrument that shows more promising evidence for its existence. The new analysis strength their original assumption that all the planets around Gliese 581 are in circular and not elliptical orbits as currently believed. It is under this likely assumption that the Gliese 581g signal appears in the new data. Another source - Herald Sun: "SUPER EARTH: Scientists discover life-supporting planet 'right at Earth's front door'" Last edited by Unstung; 07-20-2012 at 08:59 AM.

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10-20-2010, 06:37 AM	#76
RisingFury OBSP developer	Quote: Ragbir Bhathal, a scientist at the University of Western Sydney, claimed to have detected a suspicious pulse of light nearly two years ago, that came from the same area of the galaxy as the location of Gliese 581g, according to the U.K.'s Daily Mail online. Don't trust Daily Mail when it comes to science. They have a high track record of misunderstanding what papers mean, then inventing a sensationalist claim, then years later they turn around to fight the hype they started...

07-20-2012, 10:08 AM	#78
RisingFury OBSP developer	Quote: Originally Posted by tblaxland Tidally locked could be a good thing: http://www.space.com/scienceastronom...le-100929.html EDIT: FWIW, from what I can find about the physical size, surface gravity would range from 1.5g to 2.8g Any tidally locked system also tends to decrease the orbital eccentricity. Obviously that helps to stabilize the climate because you have no instances of increasing and decreasing solar flux and because you have no summer and winter cycles.

07-20-2012, 09:13 PM	#79
Keatah Orbinaut	It would be interesting to see what sort of evolution happens on a tidally locked planet.. You might get strong winds on the terminator. And dwellings for creatures might be aerodynamic. This is assuming the atmosphere rises on the hot side and condenses on the cold side. This convection action might take all the water and deposit it as snow on the dark side. Could that cause an imbalance and cause some type of super-long-term precession as weighty snow deposits on one side? How would that effect tidal lock? What kinds of politics and society would develop in a narrow habitable band? Would the habitable band be variable based on the solar fluctuations? More variable than on earth? Might it move back and forth between hot side and cold side? How would a culture develop religions? And what about space travel? Would they have a more difficult time than galileo or copernicus and kepler in figuring out how their solar system works?