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Susan Kayser
Susan Kayser is an American astronomer. She was the first woman to receive a PhD in astrophysics from the California Institute of Technology, which attracted some media attention at the time. Her thesis research included the most thorough study of the irregular galaxy NGC 6822 until 2002. She spent her career with NASA working on the Helios (spacecraft), Helios and ISEE-3, International Cometary Explorer (later called the International Sun-Earth Explorer-3) spacecraft radio astronomy experiments and with the National Science Foundation working on the Gemini Observatory. References 20th-century American astronomers American women astronomers Radcliffe College alumni California Institute of Technology alumni Year of birth missing (living people) Living people {{US-astronomer-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astrophysics
Astrophysics is a science that employs the methods and principles of physics and chemistry in the study of astronomical objects and phenomena. As one of the founders of the discipline said, Astrophysics "seeks to ascertain the nature of the heavenly bodies, rather than their positions or motions in space–''what'' they are, rather than ''where'' they are." Among the subjects studied are the Sun, other stars, galaxies, extrasolar planets, the interstellar medium and the cosmic microwave background. Emissions from these objects are examined across all parts of the electromagnetic spectrum, and the properties examined include luminosity, density, temperature, and chemical composition. Because astrophysics is a very broad subject, ''astrophysicists'' apply concepts and methods from many disciplines of physics, including classical mechanics, electromagnetism, statistical mechanics, thermodynamics, quantum mechanics, relativity, nuclear and particle physics, and atomic and m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helios (spacecraft)
''Helios-A'' and ''Helios-B'' (after launch renamed ' and ') are a pair of probes that were launched into heliocentric orbit to study solar processes. As a joint venture between German Aerospace Center (DLR) and NASA, the probes were launched from Cape Canaveral Air Force Station, Florida, on December10, 1974, and January15, 1976, respectively. The Helios project set a maximum speed record for spacecraft of . ''Helios-B'' performed the closest flyby of the Sun of any spacecraft until that time. The probes are no longer functional, but as of 2022 remain in elliptical orbits around the Sun. Construction The Helios project was a joint venture of West Germany's space agency DLR (70 percent share) and NASA (30 percent share). As built by the main contractor, Messerschmitt-Bölkow-Blohm, they were the first space probes built outside the United States and the Soviet Union to leave Earth orbit. Structure The two ''Helios'' probes look similar. ''Helios-A'' has a mass of , an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California Institute Of Technology Alumni
California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the most populated subnational entity in North America and the 34th most populous in the world. The Greater Los Angeles area and the San Francisco Bay Area are the nation's second and fifth most populous urban regions respectively, with the former having more than 18.7million residents and the latter having over 9.6million. Sacramento is the state's capital, while Los Angeles is the most populous city in the state and the second most populous city in the country. San Francisco is the second most densely populated major city in the country. Los Angeles County is the country's most populous, while San Bernardino County is the largest county by area in the country. California borders Oregon to the north, Nevada and Arizona to the east, the Me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
