Footage of the Apollo 11 landing on the moon

An evening pause: Since it is the anniversary of the Apollo 11 landing, let’s watch it as it happened on July 20, 1969. This footage, in a single continuous shot, shows the view out of the lunar module window, beginning when the spacecraft was approximately 40,000 feet above the lunar surface. The key quote as they drop to less than 100 feet off the surface is a voice that first says “60 seconds,” than later “30 seconds.” This is astronaut Charlie Duke, the capsule communicator (capcom) in mission control, telling Neil Armstrong exactly how much time he has left before running out of fuel. Despite these warnings, Armstrong took a careful, almost deliberate look at the surface, realized they were heading for a crater and decided he needed to reposition the landing site. As a result he used almost all the fuel in his tanks, which had people in mission control going nuts as they watched.

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More cave images from the Moon

James Fincannon of NASA has forwarded me two additional pictures of the same cave on the Moon, taken recently at different times by the camera on Lunar Reconnaissance Orbiter and made available by the Goddard Space Flight Center and Arizona State University.

two images of the same pit

These images clearly show that the skylight looks down into a much larger space, with the underground room belling out from the skylight in all directions. This can be seen by how the angle of sunlight hitting the floor of the cave changes over time. Below is a very crude cartoon I have drawn to illustrate what I think we are seeing in the image on the left. The dashed lines indicate unseen walls whose precise location is not yet determined.

cartoon

James also forwarded me this link, showing even more images of additional lava tube skylights on the Moon.

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Lunar conference at Ames

The third annual Lunar Science Forum is being held July 20-22 at the Ames Research Center in California. The list of papers, some of which are quite intriguing, can be found here. Fun quote from one abstract: “Purity levels of the ice suggest a degree of comingling of ice and regolith grains within the permanently shadowed crater.”

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