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  2. List of heaviest spacecraft - Wikipedia

    en.wikipedia.org/wiki/List_of_heaviest_spacecraft

    Deorbited 2001. 1986–2001. Space Shuttle Atlantis STS-117. 122,683 kg (270,470 lb) Heaviest flight of the Space Shuttle with S3/S4 truss. LEO. Retired. 1985–2011. Space Shuttle Columbia STS-93.

  3. Satellite - Wikipedia

    en.wikipedia.org/wiki/Satellite

    A satellite or artificial satellite[a] is an object, typically a spacecraft, placed into orbit around a celestial body. They have a variety of uses, including communication relay, weather forecasting, navigation (GPS), broadcasting, scientific research, and Earth observation. Additional military uses are reconnaissance, early warning, signals ...

  4. List of Earth observation satellites - Wikipedia

    en.wikipedia.org/wiki/List_of_Earth_observation...

    NASA, Roscosmos, JAXA, ESA, and CSA. 1998. The International Space Station (ISS) has long been used as a central satellite platform for other sensors, including Earth observation sensors. For example: LIS, SAGE III, TSIS-I, ECOSTRESS, GEDI, OCO-3, Diwata-1, and HICO. Jason-3.

  5. Timeline of artificial satellites and space probes - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_artificial...

    This timeline of artificial satellites and space probes includes uncrewed spacecraft including technology demonstrators, observatories, lunar probes, and interplanetary probes. First satellites from each country are included. Not included are most Earth science satellites, commercial satellites or crewed missions.

  6. Sputnik 1 - Wikipedia

    en.wikipedia.org/wiki/Sputnik_1

    Sputnik 1. Sputnik 1 (/ ˈspʌtnɪk, ˈspʊtnɪk /, 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 ...

  7. Satellite constellation - Wikipedia

    en.wikipedia.org/wiki/Satellite_constellation

    A bright artificial satellite flare is visible above the Very Large Telescope.Satellite constellations could have an impact on ground-based astronomy. [1]Satellites in medium Earth orbit (MEO) and low Earth orbit (LEO) are often deployed in satellite constellations, because the coverage area provided by a single satellite only covers a small area that moves as the satellite travels at the high ...

  8. List of USA satellites - Wikipedia

    en.wikipedia.org/wiki/List_of_USA_satellites

    List of USA satellites. This is a list of satellites and spacecraft which have been given USA designations by the United States Air Force. These designations have been applied to most United States military satellites since 1984, and replaced the earlier OPS designation. As of June 2022, USA designations have been assigned to 331 space satellites.

  9. List of space stations - Wikipedia

    en.wikipedia.org/wiki/List_of_space_stations

    It therefore is an artificial satellite featuring habitation facilities. The purpose of maintaining a space station varies depending on the program. Most often space stations have been research stations, but they have also served military or commercial uses, such as hosting space tourists.