Talk:Gliese 667 C
|A news item involving Gliese 667 C was featured on Wikipedia's main page in the In the news section on 28 June 2013.|
|WikiProject Astronomy / Astronomical objects||(Rated Redirect-class)|
Gliese 667 Ch
142 G. Scorpii C, Gliese 667C, Gl 667 C, GJ 667 C, Gl667 C, GJ667 C, Gl 667C, GJ 667C, Gl667C, GJ667C, HD 156384 C, HD 156384C, HD156384 C, HD156384C, HIP 84709 C, HIP 84709C, HIP84709 C, HIP84709C, HR 6426 C, HR 6426C, HR6426 C, HR6426C, LHS 443, LHS-443, LHS443, should all redirect here -- 22.214.171.124 (talk) 23:04, 28 June 2013 (UTC)
Map is a bit inaccurate
The given coordinates don't quite match the centre of the red circle on the map drawn. The circle needs to be shifted up and to the right, more or less to two o'clock, about two diameters. Old_Wombat (talk) 10:10, 29 June 2013 (UTC)
- You're right. I've moved it, but it might need finer tweaking. -84user (talk) 02:13, 4 July 2013 (UTC)
6 or 5 planets
- Five. Planet Cg is likely but unconfirmed, leading some sources to say "six planets". It should be five, and ITN changed accordingly. Wer900 • talk 18:18, 29 June 2013 (UTC)
The repeated use of the word "solution" is jargon. There is no previous mention of what the "problem" is. — Preceding unsigned comment added by JamesD'Alexander (talk • contribs) 14:45, 30 June 2013 (UTC)
- A "solution" is a possible planetary configuration given specific radial velocity readings. Wer900 • talk 17:18, 30 June 2013 (UTC)
The most recent definitions of a habitable zone inner edge are found in articles " How close is Earth to a runaway greenhouse?"( Ramirez) for planets with Earth-like atmospheric compositions and pressure and " Towards the Minimum Inner Edge Distance of the Habitable Zone" (zsom et al.) with different atmospheric compositions and pressure. Should habitable zone inner edge be adjested to Gliese667C system in this article? --Artman40 (talk) 09:54, 1 July 2013 (UTC)
- I'm no expert - I just quoted (and in some cases nonetheless misunderstood) the recent source on the seven planet solution. I was thinking that pulling out my own habitable zone definitions and applying them would be impermissible original research, because (for example) I don't know how the greater proportion of IR light in a red dwarf interacts with the potential of high levels of CO2 to warm a planet. However, if you can find a source that applies these sources, or any other habitable zone definitions, old or new, to the system, please, by all means add it! Wnt (talk) 17:43, 1 July 2013 (UTC)
- Neither paper is yet submitted, so no. We'll have to use Kopparapu (which I assume the discoverers did). Wer900 • talk 19:02, 1 July 2013 (UTC)
Response to reader feedback
I attempted to respond to this reader feedback for this article as follows:
- A reader asked: "Just wondering what scientist are doing now since making these discoveries. What steps are they taking to find life on these planets? How far is this from Earth? Is this a possible refuge if there was an extinction level event?"
- I expanded the abbreviation ly to help clarify how far these Gliese 667 planets are from Earth, so the lede now contains "Located 6.8 parsecs (22 light-years) away from the Solar System ...". I am unsure whether we should explicitly state that "Earth" is in the Solar System; but some readers may not be aware of this. I have no idea about the other questions, which could be asked at Wikipedia:Reference_desk/Science.
- A reader commented: "A greater explanation of the charts."
- What you did seems largely okay. However, there aren't many steps being taken beyond computer modelling and orbital observation to determine planetary habitability; our equipment is not advanced enough at this point to reliably locate biosignatures or technosignatures. So seeing city lights on GJ 667 Cc will have to wait. Wer900 • talk 18:19, 7 July 2013 (UTC)
Reader feedback: Just wondering what scientis...
Just wondering what scientist are doing now since making these discoveries. What steps are they taking to find life on these planets? How far is this from Earth? Is this a possible refuge if there was an extinction level event?
- I'm not sure this is the correct place to discuss this issue, but:
- The James Webb Space Telescope should be able to make a spectroscopic analysis of the atmosphere of these planets, thus detecting any life-specific gazes if there are some ;
- As specified in the article, this star is about 22-light-years away ;
- 22-light-years away is out of reach for any space propulsion system currently known.
- In any case, those considerations are a bit off-topic in the article, which should focus on describing what Gliese 667 C is, without expanding on its very speculative importance for mankind. That would be a PoV, I think.
- --Grondilu (talk) 08:37, 9 July 2013 (UTC)
- This paper:  arrives at a similar conclusion based on orbital stability of the system. They can find up to 4 planets in the RV-data, but the system only remains stable with only the planets b and c. Sirius3100 (talk) 13:10, 21 November 2013 (UTC)