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Forum » SpaceEngine » Science and Astronomy Discussions » Exoplanet News Thread (Post here any discoveries related to extrasolar planets)
Exoplanet News Thread
steeljaw354Date: Monday, 02.05.2016, 22:37 | Message # 226
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http://www.nasa.gov/feature....rf-star

2 Earth sized worlds in the habitable zone of this star
 
HarbingerDawnDate: Monday, 02.05.2016, 23:05 | Message # 227
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Quote steeljaw354 ()
2 Earth sized worlds in the habitable zone of this star

Congrats on being the third person to post about that in three hours.





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OstariskDate: Wednesday, 04.05.2016, 22:15 | Message # 228
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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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HarbingerDawnDate: Wednesday, 04.05.2016, 23:20 | Message # 229
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Quote Ostarisk ()
recently

Not very recent





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OstariskDate: Thursday, 05.05.2016, 10:06 | Message # 230
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ughrh





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midtskogenDate: Thursday, 05.05.2016, 11:03 | Message # 231
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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.




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WatsisnameDate: Friday, 06.05.2016, 01:09 | Message # 232
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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





 
JackDoleDate: Friday, 06.05.2016, 10:46 | Message # 233
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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. dry





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WatsisnameDate: Friday, 06.05.2016, 12:30 | Message # 234
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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. smile





 
steeljaw354Date: Tuesday, 10.05.2016, 19:46 | Message # 235
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https://www.nasa.gov/press-r....covered

Newly validated planets
 
OstariskDate: Wednesday, 18.05.2016, 02:39 | Message # 236
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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
 
spacerDate: Saturday, 23.07.2016, 04:00 | Message # 237
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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!





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spacerDate: Wednesday, 24.08.2016, 17:29 | Message # 238
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now its confirmed:
http://www.popularmechanics.com/space....oxima-b






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Edited by spacer - Wednesday, 24.08.2016, 17:32
 
steeljaw354Date: Wednesday, 24.08.2016, 17:36 | Message # 239
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We need to get it in space engine. Maybe a mod that has the planet with life?
 
simonecinque1992Date: Wednesday, 24.08.2016, 20:05 | Message # 240
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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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