The Moon Guide
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U. S. N. O.
The phase of the Moon right now


spacer Exploring the Moon

The first robot explorers
Until the dawn of the Space Age, no one had seen the farside of the Moon – indeed, the averted hemisphere was popularly referred to as the “dark side”, even though it undergoes the same monthly cycle of day and night as the Earth-facing side. Most astronomers had expected it would be broadly similar to the near side, albeit more heavily cratered, but the reality turned out to be somewhat different.

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The far side of the Moon, from Luna 3
Luna 3, launched by the former Soviet Union, gave us our first views of this unseen hemisphere when it looped behind the Moon in October 1959. By chance, the release of Luna 3’s first images coincided with a live screening of The Sky at Night on BBC TV. Patrick Moore recalled the moment: “The photographs came through exactly one minute before  transmission was due to begin, which did not give me much time to think out a suitable commentary. Luckily the Mare Crisium was shown so clearly that I was able to recognise it at once, which enabled me to get my bearings.”

Although crude by today’s standards,  the pictures were good enough to demonstrate the almost total lack of dark lowland mare areas on the farside. The reason for this asymmetry between the two sides of the Moon is still not fully understood, but it seems that most of the dark lavas that flowed out to produce the maria formed under the Earth-facing half.

The United States, spurred by President John F. Kennedy’s challenge laid down in May 1961 to land a man on the Moon and return him to Earth by the end of the 1960s, was also attempting to send probes to the Moon to ascertain what awaited the lunarnauts. The first fully successful US lunar probes were  Ranger 7 in July 1964, followed by Ranger 8 and Ranger 9 in February and March 1965, which took a rapid series of close-up photographs as they plunged towards the Moon, being destroyed on impact. The Ranger photographs revealed that even what appeared from Earth to be the smoothest parts of the surface were actually peppered with tiny impact craters and boulders, potentially hazardous to a landing.
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Sequence from Ranger 7 as it plunged towards the Moon

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The first explorers

Landers and orbiters

Sample returns and lunar rovers

Map of lunar landings

Timeline 1

Apollo To The Moon!

Apollo's Chariots

Meeting The Challenge

Repeating The Feat

Driving on the Moon

Heading for the Hills

Apollo landing chronology

spacer Maintained by SPA Webmaster: Last modified 23 September 2008
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