home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!spool.mu.edu!hri.com!ukma!netnews.louisville.edu!ulkyvx.louisville.edu!jsmill01
- From: jsmill01@ulkyvx.louisville.edu
- Newsgroups: sci.astro
- Subject: Re: Future life on Mars?
- Message-ID: <1992Dec29.122310.1@ulkyvx.louisville.edu>
- Date: 29 Dec 92 16:23:10 GMT
- References: <1992Dec29.153041.14481@athena.mit.edu>
- Sender: news@netnews.louisville.edu (Netnews)
- Organization: University of Louisville
- Lines: 36
- Nntp-Posting-Host: ulkyvx02.louisville.edu
-
- In article <1992Dec29.153041.14481@athena.mit.edu>, acgoldis@athena.mit.edu (Andrew C Goldish) writes:
- > Since everyone has been discussing the end of life on Earth over the past
- > few days, I was wondering whether or not life will be able to arise on Mars,
- > at least for a short period of time, during the last one or two billion years
- > of the solar system.
-
- [etc.]
-
- > Can the increased heat
- > from the sun melt enough ice cap and permafrost water and kick enough CO2
- > into the atmosphere to make oceans and turn Mars into a habitable planet
- > (at least in the oceans)?
- > A. Goldish
- ============================================================================
- Unless there is life there now or was in the past, when it is possible
- that Mars may have had more liquid water on its surface, then it is
- possible that we will be the first life on Mars.
-
- As to life arising on Mars in the future as the Sun warms (I didn't
- follow that particular thread, and am leaning more to the increased
- luminosity of the Sun being due to its increased size as it becomes a
- red giant), first, one needs to have a thicker atmosphere. At
- approximatel 0.01 atm, water would evaporate almost as soon as it
- formed. Additional vulcanism on the part of Mars would be necessary,
- and I have not seen anything that would indicate that would happen if
- the Sun were more luminous. And, it is possible that as a red giant,
- the surface of the sun would be much closer to Mars, if Mars is not
- inside itself (have read many different possiblities here), which
- again might make for difficulties.
-
- So, what about the gas giants?
-
- Scott Miller, Program Coordinator
- Rauch Memorial Planetarium
- University of Louisville
- jsmill01@ulkyvx.louisville.edu
-