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Exoplanet News Thread
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| Ostarisk | Date: Wednesday, 04.05.2016, 22:15 | Message # 226 |
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| Astronomers have recently taken the first picture of a protoplanetary disk:
http://www.space.com/30511-t....ge.html
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| HarbingerDawn | Date: Wednesday, 04.05.2016, 23:20 | Message # 227 |
 Cosmic Curator
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| Quote Ostarisk (  ) recently
Not very recent
All forum users, please read this!
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| Ostarisk | Date: Thursday, 05.05.2016, 10:06 | Message # 228 |
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| ughrh
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| midtskogen | Date: Thursday, 05.05.2016, 11:03 | Message # 229 |
 Star Engineer
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| They claim that the gaps in the disc have been swept clear by new planets, but is it more complex than it sounds? There are gaps in the rings of Saturn not because moons have swept them clear, but because resonances in the moons' orbits cause gravitational ripple effects (plus shepherd moons). So it seems tempting to think that there aren't necessarily planets in the gaps of the protoplanetary disc. The planets could be elsewhere, even outside the disc.
NIL DIFFICILE VOLENTI
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| Watsisname | Date: Friday, 06.05.2016, 01:09 | Message # 230 |
 Galaxy Architect
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| Yes, it is quite a bit more complex. Even the disk itself is sufficiently massive that its own self gravity and viscosity are important to forming gaps, also. There has been a lot of theoretical work in this area, particularly with simulations, so it's not totally mysterious, but definitely it is also not so straightforward as every gap = planet as the media reports sometimes describe.
https://arxiv.org/pdf/1601.00358.pdf
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| JackDole | Date: Friday, 06.05.2016, 10:46 | Message # 231 |
 Star Engineer
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| Maybe it's just the opposite!
Perhaps it are the areas with dense matter accumulation, where the planets will form sometime. 
Don't forget to look here.
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| Watsisname | Date: Friday, 06.05.2016, 12:30 | Message # 232 |
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Galaxy Architect
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| Maybe. It depends on the mechanism of the planet formation and the timeframe we observe it in. Initial phases of growth may be expected to coincide with locally higher densities. These can be brought forth from disk instabilities and shocks. However, once the gravitation of the growing planetessimal becomes significant, it will begin influencing the disk around it and produce gaps.
So, we may be seeing a disk which is only just beginning to form planets, or we may be seeing a disk which already contains planetary size bodies. I think most research is suggesting the latter (and personally I find the hydrodynamic sims pretty convincing), but there is not yet a complete, unique model. Plenty of open questions. 
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| steeljaw354 | Date: Tuesday, 10.05.2016, 19:46 | Message # 233 |
 World Builder
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| https://www.nasa.gov/press-r....covered
Newly validated planets
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| Ostarisk | Date: Wednesday, 18.05.2016, 02:39 | Message # 234 |
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| 55 cancri e is NOT a diamond planet, apparently.
https://www.theguardian.com/science....o-earth
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Edited by Ostarisk - Wednesday, 18.05.2016, 02:40 |
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| spacer | Date: Saturday, 23.07.2016, 04:00 | Message # 235 |
 Star Engineer
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Israel
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| https://exoplanets.nasa.gov/news....stem-is
star trek funs will love it!
i hope there is planets hiding there! also its triple solar system! and we just recently discovered a planet in such system!
"we began as wanderers, and we are wanderers still"
-carl sagan
-space engine photographer
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| spacer | Date: Wednesday, 24.08.2016, 17:29 | Message # 236 |
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Star Engineer
Group: Users
Israel
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| now its confirmed:
http://www.popularmechanics.com/space....oxima-b
"we began as wanderers, and we are wanderers still"
-carl sagan
-space engine photographer
Edited by spacer - Wednesday, 24.08.2016, 17:32 |
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| steeljaw354 | Date: Wednesday, 24.08.2016, 17:36 | Message # 237 |
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World Builder
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Pirate
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| We need to get it in space engine. Maybe a mod that has the planet with life?
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| simonecinque1992 | Date: Wednesday, 24.08.2016, 20:05 | Message # 238 |
 Pioneer
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Italy
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| spacer, Is that a REAL video? Plz tell me it is! (in the video seems that there are 2 other planets near the star)
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| spacer | Date: Wednesday, 24.08.2016, 20:25 | Message # 239 |
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Star Engineer
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Israel
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| simonecinque1992, its artist work. you couldnt know how it looks like exactly without been there 
maybe in the future with super telescopes we will be able to detect features on the planet to help us understand how it really looks like and made off
"we began as wanderers, and we are wanderers still"
-carl sagan
-space engine photographer
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| PlutonianEmpire | Date: Wednesday, 24.08.2016, 21:44 | Message # 240 |
 Pioneer
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United States
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| I looked at the table provided by the paper, and it said the Eccentricity for Proxima B was <0.35. Does that mean the eccentricity *is* 0.35 or anwhere between 0 and 0.35?
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