September 13, 2011
Hank Green on Space
The Hubble Ultra Deep Field: http://www.youtube.com/watch?v=dQ96unZHx-c
The Fermi Paradox: http://www.youtube.com/watch?v=wTVLsrDWxr0&feature=relmfu
These two videos are vlogbrothers videos that discuss the possibility of life in our galaxy. The first video talks about the Hubble Ultra Deep Field experiment, in which the Hubble telescope was pointed at a completely blank spot in space. A picture of that spot was taken and it revealed that there were over 3,000 galaxies in that little blank spot. And each galaxy contains billions of stars, many of them could possibly support life.
The second video discusses potential alien life more directly by discussing the Fermi Paradox. The Fermi Paradox states that there are around 400 billion stars in our galaxy, which means many of them have planets, so at least some of those planets should (and do) support life. Basing what we know off our own planet and civilization, it stands to reason that the life that the planets have supported would evolve much like our own and civilization would advance. This means that there are civilizations out there that are advanced enough to attempt space travel or at least contact with other planets. However, no evidence of life on other planets has been presented. So if it's so possible that life in space exists, where are they?
They're very interesting videos and Hank does a much better job of explaining than I do. If you've already seen them because you're a nerdfighter you get to see them again. If you don't know what I'm talking about, sorry, the vlogbrothers have a very committed following. DFTBA
Posted by jajud at September 13, 2011 09:34 PM
They're interesting videos. If there is intelligent life outside of humans (and I'm not 100% convinced there is), it's possible that they're just outside of the observable universe; they're attempts to reach us may just not have gotten here yet.
Posted by: mgilbs at September 14, 2011 01:35 AM
Good point. It questions the integrity of Drake's equation which estimates the number of civilizations in this galaxy alone that are capable of communicating with other civilizations. Drake plugged in the numbers and estimated that there were 10 civilizations in the galaxy including ours. If there are that many civilizations out there then why do they not want to talk to us? Could we be the socially awkward planet standing at the corner of the galaxy that no one wants to talk to?
Posted by: davidnug at September 15, 2011 10:07 PM
Very interesting. Well I think it's not only about highly civilized creature tends to self-destroy, but you should also think of how long it takes for primitive life to evolve before civilization - if it takes billions of years to evolve from bacteria to modern people with highly advanced technology, and 3000 years or so to enter nuclear winter and extinction, it is really not a paradox. There might be hundreds of civilizations in our galaxy, and it's only that they do not "happen" at the same time.
Posted by: wangrt at September 17, 2011 04:16 PM
Interesting. Well I think it's not only about highly civilized creature tends to self-destroy, but you should also think of how long it takes for primitive life to evolve before civilization - if it takes billions of years to evolve from bacteria to modern people with highly advanced technology, and 3000 years or so to enter nuclear winter and extinction, it is really not a paradox. There might be hundreds of civilizations in our galaxy, and it's only that they do not "happen" at the same time.
Posted by: wangrt at September 17, 2011 04:20 PM
After watching both of the videos I am pretty convinced that there are life forms out there in our universe that are more technologically advanced than us. But that makes me wonder would we rather have aliens come to Earth or Humans land on an alien planet?
Posted by: chazr at September 18, 2011 04:23 PM
These are exactly what I was going to post on here once I became an author. So glad to see that there are other nerdfighters at U of M! Fermi Paradox is not only a great song but it really makes the point that there is so much possibility for life out there, we can't be the only ones.
Posted by: serybs at September 19, 2011 12:58 PMLogin to leave a comment. Create a new account.