Mars lakes and Marsquakes, Mars, map, lake, quakes, sand, USGS. |
Mars lakes and Marsquakes, Mars, map, lake, quakes, sand, USGS. |
Dec 14 2014, 02:34 PM
Post
#1
|
|
Member Group: Members Posts: 495 Joined: 12-February 12 Member No.: 6336 |
|
|
|
Feb 10 2017, 03:05 AM
Post
#2
|
|
Senior Member Group: Members Posts: 1043 Joined: 17-February 09 Member No.: 4605 |
It seems that analysis of ancient rocks on both Earth and Mars has provided no evidence of greenhouse gasses as an explanation for warm wet environments under a faint young sun. When empirical evidence clashes with modelling it is prudent to re-evaluate the assumptions underpinning the model. One hypothesis that I find of interest is the possible effects of the solar system passing through interstellar dust clouds. There would be minimal attenuation of solar flux but the capture of molecular hydrogen would result in a significant increase in the sun's luminosity. McCrea, W.H. (1975). Ice Ages and the Galaxy, Nature 255, 607–609 suggests that an encounter with interstellar cloud densities of 10^5 to 10^7 H2/cm3 would increase the Sun’s luminosity by up to 100 percent during the course of an encounter.
|
|
|
Lo-Fi Version | Time is now: 19th April 2024 - 02:51 AM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |