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The condition to form a planetary system in a binary is that the stars are not too close and that one of the stars is massive enough to keep the planets in elliptical orbits that are not too elongated. If the components of the binary are too close and have similar masses, whatever planets are formed in the primordial nebula will wander around the stars in chaotic orbits or will have very elongated orbits and could even be expelled from the binary. If one of the stars is far enough or have much less mass than the other, planets will form around the more massive star, called the primary star, and will have nearly circular orbits. This is important to prevent the planet from becoming too hot or too cold at different times of the year.
Computer simulations by Quintana, Adamas, Lissauer and Chambers (The Astrophysical Journal, Vol. 660, p. 807, 2007) show that planets can form within 2 AU from the primary when the minimum separation of two stars is 10 AU. That's not enough to form a Jupiter that will herd water-carrying bodies to the inner planets, but at least most planets in this case will have nearly circular orbits. Planets farther out will have too eccentric orbits or their orbits will be perturbed by the other star and will probably be expelled. Out of 200 extrasolar planets or so discovered so far 33 are known to orbit components of binaries or triple stars, but the separations of the stars are larger than 100 AU. At those distances, a solar type star will have no influence on the temperature of a planet closer to the primary. Three planets have been discovered in binaries with separations less than 20 AU. This does not mean that closer binaries have no planets, but discovering them with available techniques is difficult. By the way, a recent investigation by Eggenberger, Udry, Mazeh, Segal and Mayor (Astronomy and Astrophyics, Vol. 466, p. 1179, 2007) failed to confirm the existence of a Jupiter-like planet around HD 188753 A.
Originally posted by mclinking
reply to post by Xcalibur254
Absolute rubbish!!
Leonid = meteor shower
Ele = Extinction Level Event
nin = people (Japanese)
There is no such person as Leonid Elenin, a fictitious character invented by NASA.
mclinking
Originally posted by NyxOne
Originally posted by Mercurio
E.L.E.N.I.N. = Extinction Level Event Nibiru Is Near
ELENIN: Every Little Elephant Needs Improved Nurturing.
I can do it too.
Originally posted by balon0
Originally posted by NyxOne
Originally posted by Mercurio
E.L.E.N.I.N. = Extinction Level Event Nibiru Is Near
ELENIN: Every Little Elephant Needs Improved Nurturing.
I can do it too.
ELENIN: Everyone lets eat NyxOne in Nevada.
Me too!
Ele = Extinction Level Event
nin = people
Originally posted by mclinking
reply to post by Redevilfan09
Discovered in Dec 2010?
Well, you can see where this just discovered object was in Sep 2010! Or, if you like, go further back - try it on JLS data base. Why's that? Because NASA spotted it in 1983 and have been watching it ever since. Very soon, it shall enter the Mercury orbit. Why doesn't some bright spark get its coordinates and scan an image from Google or whatever and put it on this site for all of us to see, this 'comet'.
I'm waiting.
Thank you.
mclinking
Discovered in Dec 2010?
Comet Elenin (C/2010 X1) made its debut on December 10th when Leonid Elenin, an observer in Lyubertsy, Russia, remotely acquired four 4-minute-long images using an 18-inch (45-cm) telescope at the ISON-NM observatory near Mayhill, New Mexico. Follow-up images by Aleksei Sergeyev and Artyom Novichonok at Maidanak Observatory in Uzbekistan revealed more about the new find: it had a teardrop-shaped, very diffuse coma just 6 arcseconds across and a tiny tail.
Well, you can see where this just discovered object was in Sep 2010! Or, if you like, go further back - try it on JLS data base. Why's that? Because NASA spotted it in 1983 and have been watching it ever since.
Very soon, it shall enter the Mercury orbit. Why doesn't some bright spark get its coordinates and scan an image from Google or whatever and put it on this site for all of us to see, this 'comet'.
I'm waiting.
Thank you.
I believed NASA when it said in mid 80's they'd discovered planet X. When NASA suddenly and quickly afterwards said they'd made a mistake, did I accept that? No I damn well didn't. To me, the issue still remains and 25 years later is still being debunked.
As regards the only picture I've seen about this comet, this comes from a French observatory. Well, now its a bit dated. Can we have another one? After all, its moved on a bit, would like to see what it looks like now its nearer.
Whoever showed that image, can they post an update please? And what about all the other major observatories - are they all silent on this object?
I believed NASA when it said in mid 80's they'd discovered planet X. When NASA suddenly and quickly afterwards said they'd made a mistake, did I accept that? No I damn well didn't. To me, the issue still remains and 25 years later is still being debunked.
As regards the only picture I've seen about this comet, this comes from a French observatory. Well, now its a bit dated. Can we have another one? After all, its moved on a bit, would like to see what it looks like now its nearer. Whoever showed that image, can they post an update please? And what about all the other major observatories - are they all silent on this object?