Comments on: More Evidence that Gliese 581 Has Planets in the Habitable Zone http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/ Space and astronomy news Sun, 22 Nov 2009 00:56:59 -0600 http://wordpress.org/?v=2.8.6 hourly 1 By: yourmomsnutz http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-2/#comment-64287 yourmomsnutz Tue, 21 Apr 2009 09:06:57 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-64287 more real than most think!!!!!! PLANET X THE REAL CAUSE OF GLOBAL WARMING.2009 http://www.mininova.org/tor/2503356 more real than most think!!!!!!

PLANET X THE REAL CAUSE OF GLOBAL WARMING.2009

http://www.mininova.org/tor/2503356

]]> By: Has the question of life beyond earth been answered finally by Gliese 581? | Smartlogix Technologies http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-2/#comment-59784 Has the question of life beyond earth been answered finally by Gliese 581? | Smartlogix Technologies Sun, 22 Mar 2009 19:25:43 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-59784 [...] Source Share and Enjoy: [...]

[...] Source Share and Enjoy: [...]

]]> By: jid http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-2/#comment-38412 jid Sun, 02 Nov 2008 05:51:12 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-38412 i dont know much about life but much like how we adapted to earth conditions and made our way of life couldnt life forms of any sort have the same inpact on any of the planets in the hz of gl 183? i dont know much about life but much like how we adapted to earth conditions and made our way of life couldnt life forms of any sort have the same inpact on any of the planets in the hz of gl 183?

]]> By: Matt http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-2/#comment-9430 Matt Sat, 26 Jan 2008 11:35:53 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-9430 I heard of a sun called M8. i think and it was going to be studied (i forget what space program) because it was said to almost be the same as earth and a proabilty that it has life. I heard of a sun called M8. i think and it was going to be studied (i forget what space program) because it was said to almost be the same as earth and a proabilty that it has life.

]]> By: Physical sciences news, 12/10/07-12/16/07 | Math Discussions http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-9008 Physical sciences news, 12/10/07-12/16/07 | Math Discussions Wed, 23 Jan 2008 02:25:12 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-9008 [...] • Gliese 581: one planet might indeed be habitable• Gliese 581d: A Habitable World After All?• Is Gliese 581 Habitable?• More Evidence that Gliese 581 Has Planets in the Habitable Zone [...]

[...] • Gliese 581: one planet might indeed be habitable• Gliese 581d: A Habitable World After All?• Is Gliese 581 Habitable?• More Evidence that Gliese 581 Has Planets in the Habitable Zone [...]

]]> By: Mark http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-5889 Mark Sat, 29 Dec 2007 19:35:26 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-5889 yoooooooooooooooooooooooooooo thanks for the infomation yoooooooooooooooooooooooooooo thanks for the infomation

]]> By: Timothy Eby http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-5112 Timothy Eby Sun, 23 Dec 2007 00:30:22 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-5112 Ray J. Matthews of UBC used the CSA space telescope MOST (Micorvariability and Oscillations of STars) to observe Gliese 581 for a period of six weeks following the April 2007 observation of Gliese 581c. He found that the star (M type) was remarkably stable over the time monitored and thus would provide a stable light/heat source for its planets, as might be expected from an old M type star. (see www.astro.ubc.ca/MOST). Also, remember that the surface gravity on a planet depends not only on its mass but also on the planets radius (GMm/r^2) so the mass of Gliese being 10 times that of earth must be divided by about 4 (the radius of Gliese 581c being about twice that of earth) yielding a value closer to 500 lbs rather than 2000 lbs. The distance to Gliese 581 is about 20.5 ly, relatively close, and within a distance that may make a probe to that system possible in the not too distant future. Tim Ray
J. Matthews of UBC used the CSA space telescope MOST (Micorvariability and Oscillations of STars) to observe Gliese 581 for a period of six weeks following the April 2007 observation of Gliese 581c. He found that the star (M type) was remarkably stable over the time monitored and thus would provide a stable light/heat source for its planets, as might be expected from an old M type star. (see http://www.astro.ubc.ca/MOST).

Also, remember that the surface gravity on a planet depends not only on its mass but also on the planets radius (GMm/r^2) so the mass of Gliese being 10 times that of earth must be divided by about 4 (the radius of Gliese 581c being about twice that of earth) yielding a value closer to 500 lbs rather than 2000 lbs.

The distance to Gliese 581 is about 20.5 ly, relatively close, and within a distance that may make a probe to that system possible in the not too distant future.

Tim

]]> By: Ray http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-4576 Ray Wed, 19 Dec 2007 08:03:30 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-4576 My apologies if I was unclear. I never said that a person would weigh 10 times as much on a planet 10 times the mass of Earth. I was thinking about reasons that we rule out life on large planets even if they were found in the HZ, for example, Gl 581b - if it were in the zone. Fraser seemed excited about this story and I am too. But, when I stopped to think about it, I realized that our search for life beyond planet Earth is probably best spent looking at stars more compatible with the Sun. We've searched the heavens for radio signals and found nothing that seems an indication of advanced life communicating. I'm convinced that it is out there, and probably in large numbers, but the next question is how can we travel fast enough to reach it in a reasonable time? My apologies if I was unclear. I never said that a person would weigh 10 times as much on a planet 10 times the mass of Earth. I was thinking about reasons that we rule out life on large planets even if they were found in the HZ, for example, Gl 581b – if it were in the zone.

Fraser seemed excited about this story and I am too. But, when I stopped to think about it, I realized that our search for life beyond planet Earth is probably best spent looking at stars more compatible with the Sun.

We've searched the heavens for radio signals and found nothing that seems an indication of advanced life communicating. I'm convinced that it is out there, and probably in large numbers, but the next question is how can we travel fast enough to reach it in a reasonable time?

]]> By: Allen J http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-4107 Allen J Mon, 17 Dec 2007 15:49:15 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-4107 A few questions come to mind. Has anyone pointed a radio dish at Gliese 581 to look for radio signals? How far away is it? Assuming that a civilization which has advanced to a similar level as ours could also detect planets in a habitability zone, would it be reasonable to believe they could detect our planet? Any idea how old Gliese 581 is and when the planets formed? A few questions come to mind. Has anyone pointed a radio dish at Gliese 581 to look for radio signals? How far away is it? Assuming that a civilization which has advanced to a similar level as ours could also detect planets in a habitability zone, would it be reasonable to believe they could detect our planet? Any idea how old Gliese 581 is and when the planets formed?

]]> By: John Mendenhall http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-4092 John Mendenhall Mon, 17 Dec 2007 15:12:39 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-4092 '"Tony Says: December 15th, 2007 at 9:49 am How much does an African elephant weigh? Weren't there dinosaurs that not only got to their feet but also managed to walk and run over the face of earth for millions of years that weighed considerably more than 2000 lbs?" The problem is not total weight, but weight per unit volume. It's the same volume of muscles, and two to three times as much weight. For light reading on problem (pun not intended), try Hal Clement's "Mission of Gravity". '"Tony Says:
December 15th, 2007 at 9:49 am
How much does an African elephant weigh? Weren't there dinosaurs that not only got to their feet but also managed to walk and run over the face of earth for millions of years that weighed considerably more than 2000 lbs?"

The problem is not total weight, but weight per unit volume. It's the same volume of muscles, and two to three times as much weight. For light reading on problem (pun not intended), try Hal Clement's "Mission of Gravity".

]]> By: Benjamin Horrendous http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3986 Benjamin Horrendous Sun, 16 Dec 2007 23:30:07 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3986 Just wondering.. to what extent would gravity have an effect on the size, shape and behaviour of possible life on another planet? On a planet with light gravity relative to ours, would plants and animals tend to be taller and more spindly? and on heavy grav planets would they be squat and stocky? We have a diversity of forms and behaviour here, but all have evolved under the influence of our planet's gravity . Would extreme light or heavy grav make life impossible? Ray, if you weighed 2000lbs would you even HAVE feet? Just wondering.. to what extent would gravity have an effect on the size, shape and behaviour of possible life on another planet?
On a planet with light gravity relative to ours, would plants and animals tend to be taller and more spindly? and on heavy grav planets would they be squat and stocky? We have a diversity of forms and behaviour here, but all have evolved under the influence of our planet's gravity . Would extreme light or heavy grav make life impossible?
Ray, if you weighed 2000lbs would you even HAVE feet?

]]> By: Ultra http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3939 Ultra Sun, 16 Dec 2007 16:03:34 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3939 Well, that is, unless you're an exceptionally heavy person, but I assume that we're speaking of average male adult weight. I think that this is something to be optimistic about, but it should be a very cautious optimism - just because the chemical makeup of the atmosphere, soil, etc. is suitable for life, I'm skeptical about whether or not a theoretically habitable planet would ever develop life, looking at it from a purely scientific standpoint. Though, I assume that a 'habitable' atmosphere would likely be one with the right makeup to assume that life had already existed there for some time? Regardless of life on any of these planets, though, even life that has taken unimaginable forms to fit such conditions, it would still be valuable just finding a planet that could have the barest chances of life on it. Well, that is, unless you're an exceptionally heavy person, but I assume that we're speaking of average male adult weight.

I think that this is something to be optimistic about, but it should be a very cautious optimism – just because the chemical makeup of the atmosphere, soil, etc. is suitable for life, I'm skeptical about whether or not a theoretically habitable planet would ever develop life, looking at it from a purely scientific standpoint. Though, I assume that a 'habitable' atmosphere would likely be one with the right makeup to assume that life had already existed there for some time?

Regardless of life on any of these planets, though, even life that has taken unimaginable forms to fit such conditions, it would still be valuable just finding a planet that could have the barest chances of life on it.

]]> By: IVI http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3765 IVI Sat, 15 Dec 2007 22:10:04 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3765 Ray, Surface gravity, on the planet ten times the mass of earth, is only 2.15 times stronger. So you would weigh only 430 lb. Ray,
Surface gravity, on the planet ten times the mass of earth, is only 2.15 times stronger.
So you would weigh only 430 lb.

]]> By: Ray Bingham http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3732 Ray Bingham Sat, 15 Dec 2007 18:54:12 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3732 The very ability to discover that another star has a planet is beyond my comprehension. It was only just a few years ago that we were discovering that Pluto had a satellite and we could not even image it. Only by seeing the light variations of Pluto could we know it was there. Now we can image it and even know that there are two others. What may develop in the area of visual research stagger the mind. In 10 op 20 years we may well be able to see this planet and its possible satellites. We need only be patient. But lets do a lot of speculating in the mean time. The very ability to discover that another star has a planet is beyond my comprehension. It was only just a few years ago that we were discovering that Pluto had a satellite and we could not even image it. Only by seeing the light variations of Pluto could we know it was there. Now we can image it and even know that there are two others. What may develop in the area of visual research stagger the mind. In 10 op 20 years we may well be able to see this planet and its possible satellites. We need only be patient. But lets do a lot of speculating in the mean time.

]]> By: Tony http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3713 Tony Sat, 15 Dec 2007 16:49:12 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3713 How much does an African elephant weigh? Weren't there dinosaurs that not only got to their feet but also managed to walk and run over the face of earth for millions of years that weighed considerably more than 2000 lbs? How much does an African elephant weigh? Weren't there dinosaurs that not only got to their feet but also managed to walk and run over the face of earth for millions of years that weighed considerably more than 2000 lbs?

]]> By: RUF http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3711 RUF Sat, 15 Dec 2007 16:39:35 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3711 Planets not in the HZ are worth exploring because the may have moons. Jupiter and Saturn are not in Sol's HZ, but both have moons worthy of exploring for life. Planets not in the HZ are worth exploring because the may have moons. Jupiter and Saturn are not in Sol's HZ, but both have moons worthy of exploring for life.

]]> By: Ray http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3708 Ray Sat, 15 Dec 2007 16:18:46 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3708 M type stars are not anything to get excited about. They are abundant and well worth study when it comes to discovering planets and understanding our universe, but the probability of life sustaining atmosphere is very low. Gl 581b and c are not in the habitable zone and wouldn't be good candidates for further research (although we always want to know about everything). The accuracy of measurements to determine if Gl 581d is within the habitable zone (HZ) are questionable and the probable elliptical orbit would likely take it out of the HZ at times. Radiation from m type stars is intense and would be expected to destroy any atmosphere on a planet in the HZ. Just as the same face of the moon faces the earth, the same face of Gl 581d probably faces its parent star constantly. The dark side probably couldn't sustain itself for the time that it's atmospheric currents take to pass back into warmth. In other words, the atmosphere would fall as ice on the dark side and life couldn't be sustained. Determining the actual size of this planet is very difficult to do with our current abilities, just figuring out that the planet exists is a miracle. This research wasn't about determining the parameters of the HZ or what conditions effect it, but that is a subject that greatly interests me personally thus I digress. The mass of a planetary body determines the parameters for liquid water and the availability of liquid water; I regard to be a key to any habitability. Temperature and pressure will determine the availability of liquid water. Mars didn't have the mass to sustain it even though the evidence is quite clear that it had liquid water at one time. The maximum size of a planet in terms of having a rocky surface is assumed to be about ten times the mass of earth. Although in realistic terms, we probably aren't interested in searching for life on any planet that is anywhere near that size. The size of a planet is very important to us because life as we understand it would have a hard time existing under conditions where our weight were significantly heavier. Can you imagine weighing 2000 pounds and trying to get on your feet? The work of Dr. Bloh and the Potsdam Institute is extraordinary, but I have no optimism of life in any form on Gl 581d (nor do I think that they do). M type stars are not anything to get excited about. They are abundant and well worth study when it comes to discovering planets and understanding our universe, but the probability of life sustaining atmosphere is very low. Gl 581b and c are not in the habitable zone and wouldn't be good candidates for further research (although we always want to know about everything). The accuracy of measurements to determine if Gl 581d is within the habitable zone (HZ) are questionable and the probable elliptical orbit would likely take it out of the HZ at times. Radiation from m type stars is intense and would be expected to destroy any atmosphere on a planet in the HZ. Just as the same face of the moon faces the earth, the same face of Gl 581d probably faces its parent star constantly. The dark side probably couldn't sustain itself for the time that it's atmospheric currents take to pass back into warmth. In other words, the atmosphere would fall as ice on the dark side and life couldn't be sustained. Determining the actual size of this planet is very difficult to do with our current abilities, just figuring out that the planet exists is a miracle. This research wasn't about determining the parameters of the HZ or what conditions effect it, but that is a subject that greatly interests me personally thus I digress. The mass of a planetary body determines the parameters for liquid water and the availability of liquid water; I regard to be a key to any habitability. Temperature and pressure will determine the availability of liquid water. Mars didn't have the mass to sustain it even though the evidence is quite clear that it had liquid water at one time. The maximum size of a planet in terms of having a rocky surface is assumed to be about ten times the mass of earth. Although in realistic terms, we probably aren't interested in searching for life on any planet that is anywhere near that size. The size of a planet is very important to us because life as we understand it would have a hard time existing under conditions where our weight were significantly heavier. Can you imagine weighing 2000 pounds and trying to get on your feet? The work of Dr. Bloh and the Potsdam Institute is extraordinary, but I have no optimism of life in any form on Gl 581d (nor do I think that they do).

]]> By: Frank http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3703 Frank Sat, 15 Dec 2007 15:41:37 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3703 With all the advances in astronomy, and I have read as much about all the new things we have learned in the past decades as I can absorb [but sadly I'm too dense to understand the serious amount of mathematics and physics required to truly appreciate all the beauty of it] I don't really read a lot about advances in space transportation that would allow us one day to seriously entertain the notion of trying to visit other stars. Really, is there any astronomer out there who would not sell his or her Ph.D. to hop onto a ship that was actually able to make the journey? Obviously I am aware of the big daddy of limitations with regards to space travel, but there is this deep nagging doubt in me that is convinced that we just don't understand enough physics yet to build us a system that will actually take us there [in a time frame that is reasonable within the limits of the human experience]. All this playing around with chemical propellants is heartwarmingly charming and it does work, but for the serious work of interstellar travel, we're really going to have to find something out of this world ;). Other than this juvenile dreaming it is my deep conviction that everybody on the planet should be offered a basic course in astronomy just so they could look past the horizon of their own personal limitations and understand how amazing the universe really is. With all the advances in astronomy, and I have read as much about all the new things we have learned in the past decades as I can absorb [but sadly I'm too dense to understand the serious amount of mathematics and physics required to truly appreciate all the beauty of it] I don't really read a lot about advances in space transportation that would allow us one day to seriously entertain the notion of trying to visit other stars.

Really, is there any astronomer out there who would not sell his or her Ph.D. to hop onto a ship that was actually able to make the journey?
Obviously I am aware of the big daddy of limitations with regards to space travel, but there is this deep nagging doubt in me that is convinced that we just don't understand enough physics yet to build us a system that will actually take us there [in a time frame that is reasonable within the limits of the human experience].

All this playing around with chemical propellants is heartwarmingly charming and it does work, but for the serious work of interstellar travel, we're really going to have to find something out of this world ;) .

Other than this juvenile dreaming it is my deep conviction that everybody on the planet should be offered a basic course in astronomy just so they could look past the horizon of their own personal limitations and understand how amazing the universe really is.

]]> By: Gliese 581 heeft meer planeten in bewoonbare zonebijAstroblogs http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3648 Gliese 581 heeft meer planeten in bewoonbare zonebijAstroblogs Sat, 15 Dec 2007 08:57:17 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3648 [...] De ster Gliese 581, die een half jaar terug wereldnieuws was door de ontdekking van een planeet die zich in de zogenaamde bewoonbare zone1 bevindt, blijkt mogelijk twee van dergelijke planeten te hebben. Een team sterrenkundigen onder leiding van Franck Selsis heeft berekend op welke afstand van de ster Gliese 581 die bewoonbare zone zich bevindt. Dat blijkt tussen 0,7 en 0,9 astronomische eenheden ((1 Astronomische Eenheid (A.E.) is de afstand tussen Zon en aarde, zo’n 149 miljoen km.)) als binnengrens en tussen 1,7 and 2,4 A.E. als buitengrens. In ieder geval één planeet die om Gliese 581 draait bleek daarbinnen te zitten, namelijk Gliese 581c. Vervolgens ging men ook kijken naar de productie van atmosferische kooldioxide door vulkaanuitbarstingen en daaruit volgde dat ook Gliese 581d bewoonbaar zou kunnen zijn. Het duo Gliese 581c en d zal de nodige aandacht krijgen van de komende generatie planeetzoekers ESA’s Darwin (lancering rond 2015) en NASA’s Terrestrial Planet Finder (geen idee wanneer die omhoog gaat). Een artikel van Selsis et al verschijnt binnenkort in het vakblad Astronomy & Astrophysics. Bron: Universe Today.    [...]

[...] De ster Gliese 581, die een half jaar terug wereldnieuws was door de ontdekking van een planeet die zich in de zogenaamde bewoonbare zone1 bevindt, blijkt mogelijk twee van dergelijke planeten te hebben. Een team sterrenkundigen onder leiding van Franck Selsis heeft berekend op welke afstand van de ster Gliese 581 die bewoonbare zone zich bevindt. Dat blijkt tussen 0,7 en 0,9 astronomische eenheden ((1 Astronomische Eenheid (A.E.) is de afstand tussen Zon en aarde, zo'n 149 miljoen km.)) als binnengrens en tussen 1,7 and 2,4 A.E. als buitengrens. In ieder geval één planeet die om Gliese 581 draait bleek daarbinnen te zitten, namelijk Gliese 581c. Vervolgens ging men ook kijken naar de productie van atmosferische kooldioxide door vulkaanuitbarstingen en daaruit volgde dat ook Gliese 581d bewoonbaar zou kunnen zijn. Het duo Gliese 581c en d zal de nodige aandacht krijgen van de komende generatie planeetzoekers ESA's Darwin (lancering rond 2015) en NASA's Terrestrial Planet Finder (geen idee wanneer die omhoog gaat). Een artikel van Selsis et al verschijnt binnenkort in het vakblad Astronomy & Astrophysics. Bron: Universe Today.    [...]

]]> By: Confirmada la Presencia de un Planeta Habitable en Gliese 581 | Caerolus http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3619 Confirmada la Presencia de un Planeta Habitable en Gliese 581 | Caerolus Sat, 15 Dec 2007 06:38:03 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3619 [...] (Vía Universe Today) [...]

[...] (Vía Universe Today) [...]

]]> By: Frimlin http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3540 Frimlin Sat, 15 Dec 2007 01:41:24 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3540 Harry's question is very pertinent. The only life sustaining planet we know of has a sizeable moon. I'm guessing if we can't yet take a decent look at a planet, we certainly won't be able to detect any moons any time soon. I remain very hopeful about Gliese 581 however... the latest news is fantastic. Harry's question is very pertinent. The only life sustaining planet we know of has a sizeable moon. I'm guessing if we can't yet take a decent look at a planet, we certainly won't be able to detect any moons any time soon. I remain very hopeful about Gliese 581 however… the latest news is fantastic.

]]> By: shepard http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3529 shepard Sat, 15 Dec 2007 01:14:23 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3529 SO does this mean that they can have life on the planets? SO does this mean that they can have life on the planets?

]]> By: Ilya http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3480 Ilya Fri, 14 Dec 2007 22:42:38 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3480 I don't think there is any way right now for us to know if planets in Gliese 581 have moons, and I doubt we will find that information until we have a telescope like the Terrestrial Planet Finder to see them. I don't think there is any way right now for us to know if planets in Gliese 581 have moons, and I doubt we will find that information until we have a telescope like the Terrestrial Planet Finder to see them.

]]> By: Harry Kossar http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/comment-page-1/#comment-3456 Harry Kossar Fri, 14 Dec 2007 21:35:38 +0000 http://www.universetoday.com/2007/12/14/more-evidence-that-gliese-581-has-planets-in-the-habitable-zone/#comment-3456 Do the possible habital planents have a moon or moons Thank you Harry Do the possible habital planents have a moon or moons Thank you Harry

]]>