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- 1 How can an exoplanet be able to contain water
- 2 Life on Exoplanets
- 3 Alpha Centauri Bb
- 4 KOI-172.02 paragraph in the introduction
- 5 Number of Kepler candidates
- 6 Requested move
- 7 Word confusion
- 8 Distance
- 9 NASA Kepler telescope helps identify 750 new planets outside our solar system
- 10 Beta Pictoris
How can an exoplanet be able to contain water
For finding any theoretical explanation of mechanism which results production of water in planetary system see my works.
I give new approach for this case ,as you will see the chemical kinetic which produces generally water and ammonia and methane in outer part of solar system that contains three planets body together with some planet’s atmosphere and comets body are made now not remaining from first solar system nebula .--Akbarmohammadzade (talk) 06:50, 13 September 2013 (UTC) we were show that the solar CNO cycle produced particles with protons and electrons carried by solar wind are fouling on the outer part of system and make three famous molecules :methane and water and ammonia .--Akbarmohammadzade (talk) 06:50, 13 September 2013 (UTC)
Life on Exoplanets
In the paragraph dealing with life on exoplanets, someone educated in the field of biology and development of life on earth should say something about the fact that for earth, complex lifeforms emerged only after 4 billion years and chances are that conditions on any planet just take so much time too be just right for complex life to develop.
It certainly should be mentioned with this new hype regarding the new KOI superearth analog in the habitable zone. No life will be there, not even detectable oxygen in the atmosphere. That took primitive life on earth something like 2.000.000.000 years. — Preceding unsigned comment added by 18.104.22.168 (talk) 22:56, 19 February 2013 (UTC)
- Well, while that sounds sensible, it is pure speculation. So, unless an RS made those speculations, it definitely does not belong in the article. Geo Swan (talk) 22:53, 24 July 2013 (UTC)
- On the other hand, a point could be made (in the article here) of the amazing creation of Earth (and plant, animal, Earthlings) and the delicate nature of our existence, supported by the Creator. As everyone may know, National Geographic Channel this evening features the new Fox science series “Cosmos: A Spacetime Odyssey”. President Obama will deliver the introduction. "Be there, or be square!"  FYI, Charles Edwin Shipp (talk) 12:41, 9 March 2014 (UTC)
Alpha Centauri Bb
- I've rephrased things to emphasize that there is doubt about its existence. There is also now a new section on Candidate discoveries which links to the article List of unconfirmed extrasolar planets. Astredita (talk) 12:30, 29 September 2013 (UTC)
KOI-172.02 paragraph in the introduction
- Yes. The Kepler-62 planets are currently the best examples of almost earth-size planets in the habitable zone. Astredita (talk) 17:26, 9 October 2013 (UTC)
Number of Kepler candidates
According to NASA's , the number of Kepler candidates has increased to more than 3400 (if you discount the confirmed planets). In addition, exoplanet archive now lists a few detection methods which the planet discovery graphs have not taken account for. --Artman40 (talk) 22:00, 27 October 2013 (UTC)
OK I fixed the wrong problem before, but now I see the real problem. "It is expected that there are many billions of planets in the Milky Way (at least one planet, on average, orbiting around each star, resulting in 100–400 billion exoplanets)." OK I looked up that there are about 400 billion stars in the Milky Way. Base on the information in the (), if it's true that each star has about 1 orbiting planet then it would be true to have 100-400 billion exoplanets. It is totally contradicted by the precedent statement. I know planets in Milky Way and 100-400 billion exoplanets are referring to exoplanets. I don't know about you guys, but many billions are not the same as 100-400 billion. To me, many billions mean 2-99 billions. "Many billions" should be change into "hundreds billion."Pendragon5 (talk) 04:43, 17 December 2013 (UTC)
- It does not say "about 1 planet". It says "at least 1 planet". There could well be much more than 1 per star but we just don't know at this point in time. There could be 10 on average for all we know, and that seems quite likely to me. "Many" is an unspecific term and therefore suitable since we don't know exactly how many there are. "hundreds" is too specific because it suggests that the number is known to the accuracy that it is possible to say hundreds but it isn't known that accurately. There could very well be trillions of planets in the milky way. i.e. thousands of billions, not hundreds. But we don't know. Maybe there are less than a trillion. Maybe more. All we really know is that there are billions, lots of billions, many billions. Astredita (talk) 05:42, 17 December 2013 (UTC)
- FWIW, I personally don't find "many billions" to be limited to "2-99". Usually "many" is pretty open ended. Rwessel (talk) 05:48, 17 December 2013 (UTC)
- I've deleted the 100-400b bit because: "at least 1 planet on average per star with an estimated 100-400b stars" does NOT mean 100-400b planets. It means "at least 100-400b planets". However that isn't a useful sentence. Combining a lowest estimate for planets per star with a range of estimates for the number of stars does not produce a simple estimate of the total number of planets. Astredita (talk) 06:00, 17 December 2013 (UTC)
"In many cases the semi-major axis is approximately the same as the distance between the planet and the star."
"In many cases the semi-major axis is approximately the same as the distance between the planet and the center of the star and to its surface."
I found the second version difficult to read. I'm not sure it is necessary for this sentence to specify the point on the star that the distance is measured from because the sentence is talking about approximateness. On the other hand the section as a whole is distinguishing between different points so perhaps the sentence should be reworded. Astredita (talk) 13:13, 19 February 2014 (UTC)
- Maybe it should be reworded somehow. As you say, we're distinguishing between different points. Then we should try to be crystal clear to which point we're referring at any time. --JorisvS (talk) 13:41, 19 February 2014 (UTC)
New version: "If the sizes of the star and planet are relatively small compared to the size of the orbit and the orbit is nearly circular and the center of mass is not too far from the star's center, such as in the Earth-Sun system, then the distance from any point on the star to any point on the planet is approximately the same as the semi-major axis. However, when a star's radius expands when it turns into a red giant, then the distance between the planet and the star's surface can become close to zero, or even less than zero if the planet has been engulfed by the expanding red giant, whereas the center of mass from which the semi-major axis is measured will still be near the center of the red giant." Astredita (talk) 14:48, 19 February 2014 (UTC)
NASA Kepler telescope helps identify 750 new planets outside our solar system
Headline-1: Planet bonanza: NASA announces discovery of 715 new worlds
"NASA says its Kepler telescope has discovered a bonanza of 715 planets outside our solar system, pushing the number of planets discovered in the galaxy to about 1,700."
Headline-2: ‘We Almost Doubled Just Today the Number of Planets Known to Humanity’
" "Our galaxy is looking far more crowded and hospitable. NASA on Wednesday confirmed a bonanza of 715 newly discovered planets outside our solar system." "Scientists using the planet-hunting Kepler telescope pushed the number of planets discovered in the galaxy to about 1,700. Twenty years ago, astronomers had not found any planets circling stars other than the ones revolving around our sun."
Headline-3: NASA Scientists Discover 715 New Planets — Data From Kepler Space Telescope Suggests 4 Alien Worlds Have Potential for Life
I see a picture/photograph of Beta Pictoris at the top of the article here.
Headine-1: Did two planets around nearby star collide? Toxic gas holds hints.
QUOTE: “This artist's impression of the Beta Pictoris system shows carbon monoxide gas permeating the star's dusty debris disc. Astronomers say this gas could be the signs of a massive collision of two icy, Mars-sized planets or constant collisions among a population of comets. (F. Reddy / NASA's Goddard Space Flight Center)” [Fascinating Los Angeles Times article.] — Charles Edwin Shipp (talk) 16:12, 9 March 2014 (UTC)
- FWIW - *May* also be relevant as a way a planet can receive complex organic chemicals (starting materials for life - or even primitive life-forms themselves?) (per Panspermia, Abiogenesis and related) - ref details => < ref name="LAT_20140308">Khan, Amina (March 7, 2014). "Did two planets around nearby star collide? Toxic gas holds hints". LA Times. Retrieved March 9, 2014.</ref> AND < ref name="SCI-20140306">Dent, W.R.F.; Wyatt, M.C.;Roberge, A.; Augereau,J.-C.; Casassus, S.;Corder, S.; Greaves, J.S.; de Gregorio-Monsalvo, I; Hales, A.; Jackson, A.P.; Hughes, A. Meredith; Lagrange, A.-M; Matthews, B.; Wilner, D. (March 6, 2014). "Molecular Gas Clumps from the Destruction of Icy Bodies in the β Pictoris Debris Disk". Science (journal). doi:10.1126/science.1248726. Retrieved March 9, 2014.</ref> - in any case - Enjoy! :) Drbogdan (talk) 16:43, 9 March 2014 (UTC)