C-SPAN's Lectures and History podcast is taking a break this week, and in its place,

we're sharing an episode of our AH-TV coverage of the space race.

In 1957, the steady beeping of Sputnik 1, a small Soviet satellite signaled a dramatic new phase of the Cold War,

launching a space race

between the Soviet Union and the United States. Teaselmere Harmony, curator at the National

Air and Space Museum, traces how the United States responded, from Alan Shepard's pioneering

flight in 1961 to Neil Armstrong, taking his historic first steps on the lunar surface in

1969. More after this.

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Today, a new moon is in the sky,

a 23-inch metal sphere placed in orbit by a Russian rocket.

Here an artist's conception of how the feat was accomplished.

A three-stage rocket, number one, the booster in the class of an intercontinental missile.

Its weight estimated at 50 tons.

The smaller second stage took over at 5,000 miles an hour and carried on to the highest

point reached.

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