Sputnik 1 (/ˈspʌtnɪk, ˈspʊtnɪk/, ‹See Tfd›Russian: Спутник-1, Satellite 1) was the first artificial Earth satellite. It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October 1957 as part of the Soviet space program. It sent a radio signal back to Earth for three weeks before its three silver-zinc batteries became depleted. Aerodynamic drag caused it to fall back into the atmosphere on 4 January 1958. The world's first observation was made at the school observatory in Rodewisch (Saxony).

It was a polished metal sphere 58 cm (23 in) in diameter with four external radio antennas to broadcast radio pulses. Its radio signal was easily detectable by amateur radio operators, and the 65° orbital inclination made its flight path cover virtually the entire inhabited Earth.

The satellite's success was unanticipated by the United States. This precipitated the American Sputnik crisis and triggered the Space Race, part of the Cold War. The launch was the beginning of a new era of political, military, technological, and scientific developments. The word sputnik is Russian for satellite when interpreted in an astronomical context; its other meanings are spouse or traveling companion.

Tracking and studying Sputnik 1 from Earth provided scientists with valuable information. The density of the upper atmosphere could be deduced from its drag on the orbit, and the propagation of its radio signals gave data about the ionosphere.

Sputnik 1 was launched during the International Geophysical Year from Site No.1/5, at the 5th Tyuratam range, in Kazakh SSR (now known as the Baikonur Cosmodrome). The satellite traveled at a peak speed of about 8 km/s (18,000 mph), taking 96.20 minutes to complete each orbit. It transmitted on 20.005 and 40.002 MHz, which were monitored by radio operators throughout the world. The signals continued for 22 days until the transmitter batteries depleted on 26 October 1957. On 4 January 1958, after three months in orbit, Sputnik 1 burned up while reentering Earth's atmosphere, having completed 1,440 orbits of the Earth, and travelling a distance of approximately 70,000,000 km (43,000,000 mi).

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  • Wendy_Pleakley [he/him, they/them]
    ·
    4 hours ago

    Being back in school is mindbending.

    Nobody is close to my age. I have mutual people with my classmates, but they're all 5-10 years younger than me. They all have history with each other, and my only real connection is through people who they see as "the old guys", so like, I'm the "old guy" to the "old guys".

    Everyone reads music off tablets. In 2019 we made fun of the people who were reading off tablets..? Now I'm out of touch because I don't have an iPad.

    I feel a massive cultural barrier. I feel like Captain America being thawed out of the iceberg. Time forgot me. Everyone was happy to call me dead. Put me back in the fucking ice.

    • StalinStan [none/use name]
      ·
      3 hours ago

      The weird part in my situation is that I am kinda in the same place as the young people I am now associating with. Like, I still have some Nintendo games that are older than the people I am playing the switch with at lunch