Facts about Sputnik 1

1. 08

   Sputnik 1 transmitted its iconic beeping signal at frequencies that radio operators worldwide could detect with amateur equipment, enabling global tracking and verification of the satellite's existence.

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2. 07

   During its 21-day operational period, Sputnik 1 circled Earth approximately every 96 minutes, completing roughly 1,440 orbits before atmospheric reentry in January 1958.

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3. 06

   Sergei Korolev, the Soviet chief designer, kept his identity secret from the West during Sputnik 1's development, with Western intelligence agencies unable to identify him until after the satellite's successful launch.

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4. 05

   The Soviet Academy of Sciences deliberately kept Sputnik 1's design simple and spherical to ensure its survival through the intense heat of atmospheric reentry, prioritizing scientific credibility over complex instrumentation.

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5. 04

   Weighing approximately 83.6 kilograms, Sputnik 1 was remarkably light for a satellite, allowing the Soviet R-7 rocket to achieve orbital velocity and spark the Space Race.

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6. 03

   Four external radio antennas protruding from Sputnik 1 were each 2.4 meters long and transmitted the famous beeping signal at 20.005 and 40.002 megahertz frequencies.

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7. 02

   Sputnik 1's orbital decay caused it to burn up in Earth's atmosphere on January 4, 1958, after completing 1,440 orbits around the planet in nearly three months.

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8. 01

   On October 4, 1957, the Soviet Union launched Sputnik 1, a 58-centimeter sphere transmitting radio signals for 21 days before its batteries depleted.

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