[meteorite-list] Lunar Lava Tubes Could Protect Astronauts

Lunar Shelter: Moon Caves Could Protect Astronauts By Nola Taylor Redd, Space.com http://www.space.com/32795-moon-lava-tubes-protect-astronauts.html Scientists May Have Spotted Buried Lava Tubes on the Moon by Nadia Drake , No Place Like Home (Blog)

[meteorite-list] NASA Scientists Discover Unexpected Mineral on Mars (Tridymite)

http://www.jpl.nasa.gov/news/news.php?feature=6540 NASA Scientists Discover Unexpected Mineral on Mars (Tridymite) Jet Propulsion Laboratory Jun 22, 2016 Scientists have discovered an unexpected mineral in a rock sample at Gale Crater on Mars, a finding that may alter our understanding of how

[meteorite-list] Tridymite Discovered On Mars

NASA scientists discover unexpected mineral on Mars NASA/Jet Propulsion Laboratory, June 22, 2016 https://www.sciencedaily.com/releases/2016/06/160622170422.htm http://phys.org/news/2016-06-curiosity-rover-evidence-ancient-explosive.html Richard V. Morris, David T. Vaniman, David F. Blake,

Re: [meteorite-list] What killed off megafauna?

I gave the Earth a 200 km high atmosphere, so the protective factor is less than half the increase over an atmosphere-less Earth. When factoring the atmosphere/gravity with a 100 km atmosphere the bottom line is: Solid Earth fails to block 99.9931% of Lunar impactors (1/14,500 blocked). Earth

Re: [meteorite-list] What killed off megafauna?

The following scenario estimates error in protection referencing Earth's atmosphere rather than gravity alone. It assumes Earth's atmosphere extends 100 km into space and treats everything as spherical or spherical shells. If all impactors crossing through the atmosphere are assumed sucked

[meteorite-list] Meteorite Picture of the Day

Today's Meteorite Picture of the Day: Apollo 16 Contributed by: John Divelbiss http://www.tucsonmeteorites.com/mpodmain.asp?DD=06/24/2016 __ Visit our Facebook page https://www.facebook.com/meteoritecentral and the Archives at