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An aurora, also called polar light, northern light or southern light, is a natural light display in the sky. They are usually seen in the high latitudes ( Arctic and Antarctic) regions. Auroras are produced when the Earth's magnetosphere is disturbed by the solar wind .
Below is a list of the largest stars, so far discovered, ordered by radius. The unit of measurement used is the radius of the Sun (695,700 km; 432,287.938 mi). Additional methods. A few stars are in the Zodiac, and the Moon sometimes passes in front of them. This allows calculating their size by their angular size and distance.
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- Founding and The Sputnik Crisis
- Space Flight Programs
- NASA's Future
- NASA Missions
- Use of The Metric System
- Related Pages
- Other Websites
NASA was preceded by the "National Advisory Committee for Aeronautics" (NACA). NACA was a US federal agency founded on March 3, 1915 to undertake, promote, and institutionalize aeronautical research. On October 1, 1958 the agency was dissolved, and its assets and personnel transferred to the newly created National Aeronautics and Space Administrati...
Project Mercury
Originally NASA was very small with only four laboratories and around eighty people working there. German engineers and scientists led by Wernher von Braun helped them build rockets. They had helped build the V-2 missile in Germany during World War II and the Redstone missile for the US Armyafterwards. Their Army missile laboratory was transferred to NASA. In 1960 they set up the Mercury project. The Mercury Project space missions were designed by NASA, mostly to test if humans could survive...
Project Gemini
After the success of Mercury, NASA realized it had to start planning for its missions to the Moon. The Gemini spacecraft was built for two men. It was still small and cramped similar to the Mercury capsule, but allowed for more freedom of movement. Project Gemini proved that two spacecraft could rendezvous (meet and dock) in space. Neil Armstrong, the first man on the Moon, was also on the first Gemini flight to dock with another spacecraft in outer space. The Gemini spacecraft did not dock w...
Apollo program
The Apollo program was started by President John F Kennedy in the 1960s. The program was made of 16 missions designed to send a man to the Moon and return him safely back to Earth. The first Apollo mission, Apollo 1, ended in disaster when a fire in the command module killed all the astronauts on board. The Apollo 8 and 10 missions went to the moon. They tested equipment and took photosbut did not land. The project's main success came in 1969 when Neil Armstrong and Buzz Aldrin landed on the...
The Artemis 2 mission, is scheduled to launch in 2025's third quarter. The spaceship is supposed to do a flybyof the Moon. The choice of astronauts (as of 2024's second quarter)
NASA has launched over 500 missions. Over 150 missions had humans on board. Such manned missions are the most expensive and make the most news but the majority of launches are for space exploration, science, and other purposes that do not need people. NASA spacecraft such as Cassini-Huygens and the Voyager program have visited every planet in the S...
Like other scientific organizations, NASA conducts most of its measurements in the international system (metric system). This is partially due to federal law requiring that most US government programs be done in the international system. In the 1980s, NASA transitioned to the metric system, but was still using US customary \ imperial units into the...
NASA Photos Archived 2010-11-12 at the Wayback MachineRigel is a hot supergiant star in the Milky Way galaxy. It is a blue-white supergiant. It is in the constellation Orion. Rigel is much larger than our Sun. It is 78 times the Sun 's radius, with a diameter of more than 100 million kilometers, but it's mass is 21 times more massive than our sun.
UY Scuti is a red supergiant (RSG) or red hypergiant star. It is a pulsating variable star in the constellation Scutum and one of the largest known stars in the Milky Way Galaxy. It is also one of the most luminous and well-known of its kind. [1] [2] The bright star in the centre of the picture is UY Scuti.
Wikipedia was started on January 9, 2001, by Jimmy Wales and Larry Sanger as part of an earlier online encyclopedia named Nupedia. On January 15, 2001, Wikipedia became a separate website of its own. It is a wiki that uses the software MediaWiki (like all other Wikimedia Foundation projects).
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