NASA spots 54 potentially life-friendly planets


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Message 1084152 - Posted: 5 Mar 2011, 18:59:44 UTC - in response to Message 1084096.

no Keppler is reading the dimming of a star as a planet passes in front of it. This could take years of study since earth like planets in a similar star system will take around a year each time it passes in from of its home star. this make Keppler a long term project
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Message 1084853 - Posted: 8 Mar 2011, 3:25:35 UTC - in response to Message 1084152.

Essentially any interesting rocky planets that Kepler detects, those then become targets for telescopes capable of capturing biomarks in their atmospheres, i would assume.

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Message 1086464 - Posted: 12 Mar 2011, 17:13:38 UTC - in response to Message 1082619.

Any ETs out there if they have their radio telescopes pointed toward Earth, (Orion ), i would think that all the space junk that orbit Earth would give off stronger radio signal, artificial signals, any thoughts on that.

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Message 1086474 - Posted: 12 Mar 2011, 17:32:44 UTC - in response to Message 1084096.
Last modified: 12 Mar 2011, 17:36:14 UTC

I think you are a bit off on the amount of time that an extra-solar planet around a G0 type star in the 'goldie locks' orbit would take. While our planet takes a year to orbit our sun, someone looking at our system from say 30 light years out, would see the earth transit the sun in a matter of a day or so since it would be looking at an area of oclusion of a degree or less.

The problem would be that our earth would only be in a position of detection for that short period .. which makes finding planets close in to a star and it's inherent fast transit time, and short orbital times easier to detect.
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Message 1086750 - Posted: 13 Mar 2011, 15:44:38 UTC - in response to Message 1086474.

The detection of Earth by any listening ETs should be easier if their telescopes are able to block out sun's glare thus perhaps giving off any biomarks on earth's atmosphere. That begs the question, when telescopes here on Earth are able to block off a star's glare, the detection of Earth size planets should be easier.

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Message 1086753 - Posted: 13 Mar 2011, 16:03:30 UTC
Last modified: 13 Mar 2011, 16:08:17 UTC

I have just now hit 1,000,000 in credits and have now shut down my six processors after several years of computing for BOINC/SETI. My computers are in my office which is a small (8 x 10) sunroom.

All winter I have kept this room around 70 degrees fahrenheit while I set my thermostat on 59 degrees in the part of the house that includes this heating zone. Two computers with six cores and three printers provide significant heat in this space. I will calculate how much electricity this has used and dollars expended on same later on.

Over the years I have lost faith in this effort ever being successful as I feel that there won't be many habitable planets in the entire galaxy that would support intelligent life's evolution. I am unsure that these work units will ever be revisited and promising ones aggregated and re-explored. Perhaps in the entire universe there might be a significant number of such planets; but the numbers are probably too few and the space too vast for us to ever know, in my opinion.

So for now I will remain an agnostic as far as intelligent, detectable alien life is concerned.

I will stay tuned in to what's happening here and redirect the money spent on processing work units to help me stave off bankruptcy.

Regards to all

Daddio

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Message 1086758 - Posted: 13 Mar 2011, 16:13:09 UTC - in response to Message 1086753.

This is not exactly the thread to say goodbye in.
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Message 1088613 - Posted: 19 Mar 2011, 23:23:05 UTC - in response to Message 1086753.

Life is outthere in the Milky Way

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Message 1089887 - Posted: 24 Mar 2011, 5:44:32 UTC - in response to Message 1088613.

Our galaxy might be a bit more crowded than we've ever thought.

A new study by the scientists at NASA's Jet Propulsion Laboratory in Pasadena, CA suggests that one out of every 37 to one out of every 70 sun-like stars may have an Earth-like planet in it's orbit, according to Space.com. These planets are at such a position that liquid water could exist on the planet's surface, according to the researchers.

~more~

2 Billion Alien Earths Could Exist In Our Galaxy
http://www.huffingtonpost.com/2011/03/23/2-billion-alien-earths_n_839653.html

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Message 1090009 - Posted: 24 Mar 2011, 16:18:48 UTC
Last modified: 24 Mar 2011, 16:31:07 UTC

Just to put this in perspective, there are 37 star systems within ~15 light years of Earth. There are 70 star systems within ~19 light years. The nearest planet, potentially inhabitable by life as we know it is probably only 15 to 19 light years distant. Quite close in the galactic scheme of things. Our galaxy is ~ 100,000 light years in diameter. You can use the cube of the distance to expand on this. If there is one habitable planet within 19 light years, there should be 8 such planets within~ 38 light years, and 64 habitable planets within ~76 light years. Michael

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Message 1090044 - Posted: 24 Mar 2011, 18:13:59 UTC - in response to Message 1090009.
Last modified: 24 Mar 2011, 18:17:23 UTC

In spite of other estimates based on a sphere . The Milky Way is a very flat disk. There are a reported 500 main sequence stars within 100 light years. So within 1000 light years there might be 50 000 such stars or perhaps a few thousand 'Habitable" ones. I have seen other estimates that are in the millions??

We have to be very careful what "habitable" means in each of these reports. "Habitable" to produce life such as ours may require more than a dozen parameters to exist and to fall within certain ranges. (Magnetic field, stable circular orbit, water etc).

Next we need to calculate how far out we could hear aliens with our current antennas and likely emissions both spurious and intended.

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Message 1090184 - Posted: 25 Mar 2011, 3:09:03 UTC - in response to Message 1090044.

the next step would be to have optical telescopes really powerful capable of imaging a planet 1000 light years way, and with ability to identify biomarks in a planet's atmosphere.

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Message 1091446 - Posted: 29 Mar 2011, 12:48:00 UTC - in response to Message 1090184.
Last modified: 29 Mar 2011, 12:49:26 UTC

Our sun is the separate one just below the first row of stars. Supposedly thats jupiter and earth transiting the sun.

kepplers suns and planets
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Message boards : SETI@home Science : NASA spots 54 potentially life-friendly planets

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