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Lunar Orbiter 1 - Space Mission
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Lunar Orbiter 1

description Lunar Orbiter 1 Overview

The Lunar Orbiter 1 mission involved a NASA spacecraft launched in 1966. It achieved the distinction of being the first American vehicle to successfully enter lunar orbit. The orbiter conducted extensive photographic mapping of the Moon’s surface, specifically targeting areas considered for potential Apollo landing sites. This data proved invaluable for mission planning and site selection supporting the early stages of human exploration of the Moon.

Primarily used by NASA scientists and engineers involved in the Apollo program.

insights Why this score

Lunar Orbiter 1 ranks #64 of 212 in the Space Mission ranking, behind Herschel, ahead of Luna 17.

First U.S. lunar orbiter, Apollo site mapping, first Earth view from lunar distance, foundational but partly utilitarian.

help Lunar Orbiter 1 FAQ

What was the primary objective of Lunar Orbiter 1?

NASA launched Lunar Orbiter 1 in 1966 primarily to photograph and map potential smooth landing sites on the Moon for the upcoming Apollo missions. It was the first American spacecraft to successfully achieve a stable lunar orbit. The photographs it transmitted back to Earth were crucial for planning the 1969 Apollo 11 moon landing.

Did Lunar Orbiter 1 take the first picture of Earth from the Moon?

Yes, Lunar Orbiter 1 captured the very first photograph of the Earth taken from the vicinity of the Moon in August 1966. The image showed our planet rising over the stark lunar horizon. This was an unexpected but profoundly iconic secondary achievement of the mission.

What happened to the Lunar Orbiter 1 spacecraft after its mission?

After successfully completing its photographic mission, the spacecraft was intentionally commanded to crash into the Moon's surface. It was deliberately de-orbited near the equator to prevent it from becoming a collision hazard for future Apollo missions. This debris remains on the lunar surface today.

How did Lunar Orbiter 1 send its photos back to Earth in 1966?

The spacecraft developed its 70mm film onboard using a specialized bimat process, then scanned the developed film with a photomultiplier. The resulting analog video signals were transmitted to receiving stations on Earth. NASA scientists then reconstructed these signals into the historic photographs used for Apollo planning.

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