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Edwin Hubble discovered that the universe was constantly expanding. His theory helped form a new line of research for astronomers in the future.
https://www.thefamouspeople.com/profiles/edwin-powell-hubble-527.php
http://huntingtonblogs.org/2012/11/hubble-and-copernicus/ -
Pluto was discovered by Clyde Tombaugh.
https://www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/what-is-pluto-k4.html -
Karl Jansky discovered radio waves coming from the stars. The United States broadcast this static noise in celebration.
http://amazingspace.org/resources/explorations/groundup/lesson/scopes/reber/index.php
https://www.nrao.edu/whatisra/hist_jansky.shtml -
Grote Reber built the first radio telescope. It was used to detect radio waves throughout the galaxy.
https://www.nrao.edu/whatisra/hist_reber.shtml -
Grote Reber used his radio telescope to make a complete map of the Milky Way's radio waves. This opened up a new field of radio astronomy.
http://amazingspace.org/resources/explorations/groundup/lesson/scopes/reber/index.php -
The first artificial satellite was launched into orbit around Earth by the Soviet Union. The satellite was called Sputnik 1 and was the beginning of the space age. https://www.nasa.gov/multimedia/imagegallery/image_feature_924.html
https://nssdc.gsfc.nasa.gov/nmc/masterCatalog.do?sc=1957-001B -
Yuri Gagarin becomes the first human in space.
https://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=1961-012A -
Apollo 11 puts the first man on the moon.
https://www.nasa.gov/mission_pages/apollo/apollo11.html -
The Soviet Union sent the first successful lunar rover to the moon.
https://moon.nasa.gov/resources/37/lunokhod-1/ -
Hubble was launched into orbit from the Space Shuttle Discovery. This was the worlds first space based telescope.
https://www.nasa.gov/mission_pages/hubble/story/index.html -
The Mars Pathfinder lands on the surface of Mars. This is the first robotic rover to visit the planet.
https://mars.nasa.gov/programmissions/missions/past/pathfinder/ -
The first part of the ISS was launched from a proton rocket. The module is named Zarya.
https://www.iss-casis.org/about/iss-timeline/ -
The dwarf planet Eris was discovered by a group of astronomers at the Palomar Observatory.
https://solarsystem.nasa.gov/planets/dwarf-planets/eris/in-depth/
https://solarsystem.nasa.gov/planets/dwarf-planets/eris/in-depth/ -
A new kind of radio telescope is built in the Netherlands. LOFAR uses Omni-directional antenna rather than a dish antenna like Reber's original radio telescope. This design maps frequencies at a greater resolution and is less expensive.
http://www.lofar.org/about-lofar/about-lofar -
NASA launches the Parker Solar Probe. This is the first mission to enter the Sun's atmosphere.
https://www.nasa.gov/press-release/nasa-ula-launch-parker-solar-probe-on-historic-journey-to-touch-sun
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