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2021 (MMXXI) was a common year starting on Friday of the Gregorian calendar, the 2021st year of the Common Era (CE) and Anno Domini (AD) designations, the 21st year of the 3rd millennium, the 21st year of the 21st century, and the 2nd year of the 2020s decade.
Like 2020, the year 2021 was also defined by the COVID-19 pandemic. Multiple variants emerged. The rollout of COVID-19 vaccines, which began in late 2020, continued in this year.







































































































{{cite news}}: CS1 maint: deprecated archival service (link)Half a year ago, a SpaceX rocket lifted off with the four astronauts — three from NASA, one from Japan's space agency — who were sitting inside one of the company's Crew Dragon capsules. On Sunday, the same capsule, named Resilience, safely returned to Earth, just before 3 a.m. Eastern time.
{{cite web}}: CS1 maint: deprecated archival service (link)SpaceX launched a high-altitude Starship prototype rocket and successfully landed it for the first time on Wednesday, overcoming a key challenge in Elon Musk's whirlwind quest to build a fully reusable Mars rocket.
SpaceX achieved the first successful touchdown of its prototype Starship rocket during the latest test flight of the next-generation launch vehicle in south Texas on Wednesday, after four previous landing attempts ended in explosions.
{{cite web}}: CS1 maint: deprecated archival service (link)China has successfully landed a spacecraft on Mars, state media announced early on Saturday. The six-wheeled Zhurong robot was targeting Utopia Planitia...
On Monday, June 7 [...] NASA's Juno spacecraft will come within 645 miles (1,038 kilometers) of the surface of Jupiter's largest moon, Ganymede. The flyby will be the closest a spacecraft has come to the solar system's largest natural satellite since NASA's Galileo spacecraft made its penultimate close approach back on May 20, 2000.
As part of a research plan submitted by Scott Bolton, Juno's principal investigator, the spacecraft will fly to within 1,000km of the surface of Ganymede...
{{cite web}}: CS1 maint: deprecated archival service (link){{cite web}}: |first= has generic name (help){{cite web}}: |first= has generic name (help){{cite web}}: |last= has generic name (help)This unusual spaceflight will be connected to the filming of the movie "Vyzov" ("The Challenge") [...] Pavel Vlasov, head of the Yuri Gagarin Cosmonaut Training Center, has previously stated that Soyuz MS-19 will launch on Sept. 20 [...] However, other sources still give a projected launch date of Oct. 5.
{{cite web}}: CS1 maint: deprecated archival service (link)Russia said its film crew will take up two of the three seats aboard the October 5th launch of Russia's Soyuz MS-19 spacecraft.
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...SpaceX Crew-3 mission to the International Space Station, which is targeted to launch as early as Oct. 23. [...] When Barron, Chari, Marshburn, and Maurer arrive at the orbiting laboratory, they will become expedition crew members for the duration of their six-month science mission.
NASA and SpaceX have announced that the pair's autumn mission to send four astronauts to the International Space Station will launch no earlier than Oct. 23. [...] In conjunction with the Oct. 23 launch window for Crew-3, Crew-2 will return to Earth no earlier than Oct. 31, giving the two cohorts about a week of overlap to transition the space station safely to its next residents.
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