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Air Force Two is the air traffic control designated call sign held by any United States Air Force aircraft carrying the vice president of the United States, but not the president. [ 1 ] [ 2 ] The term is often associated with the Boeing C-32 , a modified 757 which is most commonly used as the vice president's transport.
A C-32A dwarfed by a VC-25A at Paris-Orly Airport, 2009. The C-32A is the military designation for the Boeing 757-2G4, a variant of the Boeing 757-200, a mid-size, narrow-body twin-engine jet airliner—that has been modified for government VIP transport use, including a change to a 45-passenger interior and military avionics. [1]
Hubble's law can be easily depicted in a "Hubble diagram" in which the velocity (assumed approximately proportional to the redshift) of an object is plotted with respect to its distance from the observer. [30] A straight line of positive slope on this diagram is the visual depiction of Hubble's law.
Two years later, Hubble showed that the relation between the distances and velocities was a positive correlation and had a slope of about 500 km/s/Mpc. [10] This correlation would come to be known as Hubble's law and would serve as the observational foundation for the expanding universe theories on which cosmology is
Presidents Eisenhower, Kennedy, Johnson, and Nixon used an Air Force One plane known as SAM 970. The first jet-powered presidential aircraft featured an office and a safe for the nuclear codes.
4 total force as of September 2023 (USAF Almanac). [1] T-51 Cessna: United States basic trainer: T-51A: 3 3 total force as of September 2023 (USAF Almanac). [1] T-53A Kadet II: United States basic trainer: T-53A: 24 24 T-53A total force as of September 2023 (USAF Almanac). [1] 25 T-53A operational (WAF 2025). [2] TC-135 Stratolifter: United ...
As is so often the case, an already big number kept getting bigger and by 2019, Air Force Magazine was reporting that the new planes were expected to cost $5.2 billion. Their 100,000-plus page ...
The images were discovered in a review of Hubble observation archival data from 2010, according to astronomer Wenlei Chen, a University of Minnesota postdoctoral researcher and lead author of the ...