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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  • Goblinmancer [any]
    ·
    10 days ago

    Dnd fantasy: level 20 wizards are gods!!!!!

    Dnd reality:

    You cast finger of death on John Souls the level 20 fighter

    Failed save

    John souls attacked you 4 times.

    Wizard dead.

    • ComradeMonotreme [she/her, he/him]
      ·
      10 days ago

      The problem is level 20 fighters are also gods. They're slashing 4 times in a moment, faster than you can follow like an anime character.

      • Frank [he/him, he/him]
        ·
        10 days ago

        If rounds are still six seconds that is actually possible. A really good swordsperson can move with terrifying speed. Really skilled archers who train for speed shooting and put out an arrow a second with the right combination of gear and technique.

        And it's cool cause it's not just speed, there's this elegance thing where really, really good fighters don't waste any movements. Like the power from one swing is already putting the blade in position for the next swing. When the enemy attacks the skilled fighter parries in away that also allows them to attack with the same movement.

        I'm not especially skilled but years of fussing around got me to the point where i can mostly understand how and why longswords are used they way they are. It really is scientific, all about the intersection of planes and rays, the angles of a potential attack, it's all very precise and mathematical.

          • Frank [he/him, he/him]
            ·
            10 days ago

            Did you ever read this old essay on the Alexandrian? It's about how D&D 3.0 handles, idk, "realism", and goes in to just when your characters went off the rails and started being super heroes. It uses Lord of the Rings as an example. It's a pretty neat time capsule.

            https://thealexandrian.net/wordpress/587/roleplaying-games/dd-calibrating-your-expectations-2