Wow Signal Planetary Origin


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C Olival
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Message 1082835 - Posted: 2 Mar 2011, 3:27:51 UTC - in response to Message 1082718.

Exoplanets classafied as super earths, were they possibly gaseous planets that migrated toward their star, thus having their atmospheres stripped by the gravity of the star. Their migration could have been caused by a passing object such as brown dwarf or by a passing main sequence star.Life on a superhearth might be difficult because of the slow rotation of the planet, thus making seasons very long,bringing to mind a venusian scnario in terms of seasons; plant cyle might not take hold on such a planet.

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Message 1083078 - Posted: 2 Mar 2011, 22:59:31 UTC - in response to Message 1082835.

unlikely, A gas giant/star twin would have to be fairly close to have the atmosphere stripped by the star. If it were stripped you'd see some remnant of a halo around the star and planet.
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Message 1083746 - Posted: 5 Mar 2011, 3:55:20 UTC - in response to Message 1083078.

Any rocky planet on the abitable zone would need water so life as we know it could synthasize; comets would have to be the carriers of that water, any rocky planets in a solar system without commets as water carries, dificult for life to start.

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Message 1084102 - Posted: 5 Mar 2011, 15:52:31 UTC

First, it seems unlikely that a solar system would not have comets. Second, The water on Earth dies not appear to have the same isotopic ratio as that on comets. Earth's water seems to have either been a primordial constituent of this planet, or to have been carried here by asteroids impacts, or a combination of the two. Michael

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Message 1084132 - Posted: 5 Mar 2011, 18:12:19 UTC - in response to Message 1084102.

Another constituent for life on a planet is for that planet to have some kind of a moon, so things like ocean tides are able to exist, seasons, etc. Moon's earth has influence on ocean tides, and on agricultoral crops.

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Message 1084151 - Posted: 5 Mar 2011, 18:57:41 UTC - in response to Message 1084132.

the earth has seasons because of the angle it faces the sun with. The moon however does provide us with tides twice a day. the sun to a lesser affect
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Message 1084490 - Posted: 6 Mar 2011, 23:18:24 UTC - in response to Message 1084151.

Would there be life on earth if there were no tides, life begun in the ocean here on earth, so this makes it more plausible that a mooon(s) might be an essential ingredient for life on a planet, giving weather stability to the planet. Would there be life on earth without the Moon, moons act as a shield agains being hit by an esteroids, comets.

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Message 1084616 - Posted: 7 Mar 2011, 13:42:44 UTC - in response to Message 1084490.

yes there would. Tides are nice for turtles and several species of fish that lay eggs at annual high tides. for most sea creatures it doesnt really matter
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Message 1084636 - Posted: 7 Mar 2011, 14:30:39 UTC

The Sun's gravity causes tides, too. About 1/3 as large as those caused by the Moon. The Moon is probably more useful in maintaining a steady axial orientation of the Earth, than as a shield from asteroids, comets,etc. Mars has no large moons, and its axis wobbles considerably over very long periods of time. This causes climatic variations that might be somewhat disruptive to any life that might be there. Planets with relatively large moons may not be especially rare. Simulations have shown that they should probably develop in roughly 1 in 200 cases. Planets closer to a cooler star than ours would be in the habitable zone, and experience greater solar-caused tides than we do. Such an arrangement would probably also damp out wobbles in the planet's axis. Michael

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Message 1084851 - Posted: 8 Mar 2011, 3:21:52 UTC - in response to Message 1084636.

As the moon gets further and further way from Earth, climatic dramatic affects might occur to our planet.

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Message 1084901 - Posted: 8 Mar 2011, 5:14:50 UTC - in response to Message 1084490.

The Moon is no more a shield to the Earth than a knight’s shield would be if it were circling him at a distance of some sixty metres. In other words the probability is tiny that an ‘inbound’ impactor would have a close encounter with the Moon on the way.
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Message 1085093 - Posted: 8 Mar 2011, 17:09:30 UTC

Is life more prone to take foot on stars on the outskirst of the Milkyway, or closer to the galatic bulge; where there is a much higer abundance of stars.

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Message 1085098 - Posted: 8 Mar 2011, 17:17:57 UTC

The teory of terraforming, could be applicable to Mars, that planet has great quantities of frozen ice under the suface, and punping vast quantities of nitrogen and oxygen onto its atmosphere, might turn the red planet onto a blue planet; or maybe not, migth sound too radical.

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Message 1085308 - Posted: 9 Mar 2011, 14:43:31 UTC - in response to Message 1085093.

The current thinking seems to be that high levels of radiation near the center of the galaxy, which would be harmful to life, probably cancel out the advantage of more stars, thus more planets there. There are fewer stars than average at the fringes of the galaxy, and so, fewer opportunities for life. We end up with a broad ring, neither too near or too far from the galactic center, where moderate radiation levels and moderate numbers of stars and planets make the most favorable conditions for life, so far as we know. It has been called the Galactic Habitable Zone. Michael

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Message 1085351 - Posted: 9 Mar 2011, 17:04:21 UTC - in response to Message 1085098.

Where do the materials and energy required come from and how much of each are required ??

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Message 1085356 - Posted: 9 Mar 2011, 17:25:19 UTC - in response to Message 1085308.

So radiation levels plays a big part when it comes to the development of life

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Message 1085667 - Posted: 10 Mar 2011, 13:51:44 UTC - in response to Message 1085356.

yes it does. Higher life forms are much more fragile in the presence of high levels of radiation. this includes cockroaches! bacteria on the other hand and especially spore forming bacteria are fairly resistant to radiation.
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Message 1085757 - Posted: 10 Mar 2011, 17:34:22 UTC - in response to Message 1085667.

I agree.

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Message 1086454 - Posted: 12 Mar 2011, 16:54:38 UTC - in response to Message 1085351.

That is a good question, possibly from commets, somehow perhaps melting the polar caps of Mars, the temperature migh rise, trapping heat in the atmosphere, making the astmosphere more dense, releasing all the carbon dioxide onto the atmosphere, creating a venusian type atmosphere, minus the sulfuric acid. To date, are any space telescopes able to listen for radio signals? Might be easier for space based readio telescope to capture ET radio signals, bypassing the interference of Earth's atmosphere.

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Message 1086462 - Posted: 12 Mar 2011, 17:11:17 UTC - in response to Message 1086454.

my understanding is that radio telemetry doesn't have the same draw backs as optical telescopes. So having a space based radio dish is probably not necessary. Besides how would they get the 50 Gb hard drives back to Berkeley
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