July 4, 2011

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Let the Fireworks Fly

LPOD-Jul4-11.jpg
left image by Alexandros Diamantis, Greece, and right image by Howard Eskildsen, Florida

One of the most contentious issues in lunar science is the reality of the late heavy bombardment (LHB). This is a proposal that most of the Moon's impact basins and large craters formed in a frenzy of collisions about 3.9 billion years ago. Thus, morphologoically young basins like Orientale and Imbrium may be only tens of millions of years younger than degraded ones such as Serenitatis. The older interpretation is that there was a great decline in cratering rates from 4.4 b.y. to 3.9 b.y. ago so that there would be hundreds of millions of years age difference among basins. Two different types of evidence were presented at the Lunar & Planetary Science Conference in Houston this March to question the LHB. German scientists Chuck Wood

Technical Details
Nectaris Basin: 4/22/2007. Celestron 9.25XLT Carbon fiber-Sony DSC-H1.
 Sculptured Hills: 9/14/10; 00:00 UT. 6" f/8 refractor, Explore Scientific Lens, 2X Barlow, DMK 41AU02.AS.
Both of these images were found on the LPOD Photo Gallery. With only 55 more contributions, the Photo Gallery will reach 5000 images!

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