Talk:2079: Alpha Centauri

Explain xkcd: It's 'cause you're dumb.
Revision as of 19:43, 1 December 2018 by RIIW - Ponder it (talk | contribs) (Earth a special case?)
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Possible concept projects he's referencing:
https://en.wikipedia.org/wiki/2069_Alpha_Centauri_mission or https://en.wikipedia.org/wiki/Breakthrough_Starshot
172.68.65.150 18:18, 30 November 2018 (UTC)

Breakthrough Starshot sounds relevent enough to mention in the article. In 2016 an earth-like planet was discovered orbiting Proxima Centauri, which is the closest star in the universe to our sun. Other destinations are considered for the project, but the plan is to visit this planet. Expected velocity is 37,300 km/s. Estimated departure date is 2036, arriving by 2066. Significant funding exists. But some of the technologies do not quite yet. (for those who don't want to click the link) 162.158.187.25 21:06, 30 November 2018 (UTC)

Alpha century does have 3 stars: Alpha Centauri A (also named Rigil Kentaurus[15]), Alpha Centauri B (also named Toliman), and a small and faint red dwarf (Class M), Alpha Centauri C (also named Proxima Centauri[15]) https://en.wikipedia.org/wiki/Alpha_Centauri
172.68.65.150 18:18, 30 November 2018 (UTC)
I don't know what the (voices off) is complaining about. We only have one star! So Alpha Centauti is an upgrade ;-) RIIW - Ponder it (talk) 18:44, 30 November 2018 (UTC)

But if your going to upgrade, go all the way at least. (Definitely not an excuse I use to buy better PC hardware)Linker (talk) 18:49, 30 November 2018 (UTC)

Check out figure 1 on page 3 of this 2016 study: http://www.ice.csic.es/personal/iribas/Proxima_b/pdf/Proxima_habitability_II.pdf showing how likely the researchers believe there to be oceans on Proxima b. They expect us to be able to determine what's true directly in 10 years when construction of larger telescopes is completed. Most other sources I found in my brief search are very careful to say that we do not know at all whether or not there is water on this nearby exoplanet. 162.158.186.108

I (on the basis of no astrophysicists training, just being a Civil Engineer) can't help wondering that of the three planets in the Sun's Goldilocks zone* that only one has... 1. a strong enough magnetic field to prevent the solar wind stripping off a light atmosphere, that prevents the water boiling and being blown away. 2. an abnormally big moon**. 3. proven plate techtonics. 4. macro life.

And so that 2 is crucial to 1 and 3 and 3 is crucial to 4 (including 1 of course)

So why we expect liquid water everywhere is a mystery to me.

YMMV and I reserve the right to be (proved) wrong

  • apparently according to various things I have read over the decades
    • some believe Mars had a bigger moon (magnetic field and oceans) before it's orbit decayed and it collided.

RIIW - Ponder it (talk) 19:43, 1 December 2018 (UTC)