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An image of Earth taken by the Lunar Orbiter from its orbit around the moon, August 23, 1966; Photo credit: NASA

Apollo 11: Day 3

Image taken on the third day of Apollo 11’s flight. Earth seen from 162,400 nautical miles away; Africa, with the Sahara Desert, is quite clear. Image credit: LPI

Aldrin: “Houston, Apollo 11. We’ve got the continent of Africa right facing toward us right now, and of course, everything’s getting smaller and smaller as time goes on. The Mediterranean is completely clear. The Sun looks like it’s about to set around Madagascar. The equatorial belt of Africa stands out quite clearly. We’re seeing a dark green or a muddy colored green, compared to the sandier colors of the southern tip of Africa and, of course, the Sahara northern coast of Africa. There’s a rather remarkable cloud that appears in the vicinity of the border between Afghanistan and Pakistan. It’s just about to go into the sunset now. It is casting quite a large shadow. It’s isolated. There don’t seem to be any other clouds. The band of clouds near the tropical convergent clouds down around the equator clearly separate the clockwise and the counter-clockwise cloud formations. Over.”

This was the final day of preparations for the lunar landing scheduled for the following day. The spacecraft approached the moon, and went behind it, putting Apollo 11 in a blackout with Earth. The crew used that time to prepare for their first lunar orbit insertion maneuver: To position themselves to orbit the moon.

Apollo 11: Day 2

Earth as seen from 113,500 miles away, on Day 2 of Apollo 11’s journey. North is up, with Greenland visible, South America can also bee seen. Image credit: LPI

Collins: “Rog. I’ve got the world in my window for a change and looking at it through the monocular, it’s really something. I wish I could describe it properly, but the weather is very good. South America is coming around into view. I can see on the – what appears to me to be upper horizon, a point that must be just about Seattle, Washington, and then from there I can see all the way down to the southern tip – Tierra del Fuego and the southern tip of the continent.”

Armstrong and Aldrin, while on live TV, put on their spacesuits and went down the docking tunnel from Columbia to the Lunar Module (LM). They gave viewers on Earth a short tour of the vehicle that would take them to the lunar surface.

To break away from the Earth’s gravitational field, Apollo 11 needed a speed of 7 miles per second. By the close of the second day, Apollo 11 would leave the Earth’s gravitational field, and enter the moon’s. The Columbia and Eagle would then slow to 2400 mph at this time.

Happy Earth Day

Photo credit:NASA