cryogenic period
41Space Shuttle Discovery — Discovery OV 103 Space Shuttle Discovery launches from NASA Kennedy Space Center Launch Pad 39A on mission STS 124. OV designation OV 103 Country …
42CERN — For the company with the ticker symbol CERN, see Cerner. For the rocket nozzle, see SERN. Coordinates: 46°14′03″N 6°03′10″E / 46.23417°N 6.05278°E …
43Extended Duration Orbiter — The Extended Duration Orbiter program was a project by NASA to prepare for long term (months) microgravity research aboard Space Station Freedom, which later evolved into the International Space Station. Scientists and NASA needed practical… …
44List of unsolved problems in physics — This is a list of some of the major unsolved problems in physics. Some of these problems are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result. The others are… …
45Magnetic resonance imaging — MRI redirects here. For other meanings of MRI or Mri, see MRI (disambiguation). Magnetic resonance imaging Intervention Sagittal MR image of the knee ICD 10 PCS B?3?ZZZ …
46Astrophotography — An image of Orion s Belt composited from digitized black and white photographic plates recorded through red and blue astronomical filters, with a computer synthesized green channel. The plates were taken using the Samuel Oschin Telescope between… …
47Ethane — This article is about the chemical compound. For the emergency service protocol, see ETHANE. Ethane …
48RP-1 — (alternately, Rocket Propellant 1 or Refined Petroleum 1) is a highly refined form of kerosene outwardly similar to jet fuel, used as a rocket fuel. Although having a lower specific impulse than liquid hydrogen (LH2) and thus less thrust per unit …
49Operation Castle — Castle Romeo Information Country United States Test site Pacific Proving Grounds Period March May 1954 Number of tests …
50Diatomaceous earth — A sample of diatomaceous earth Diatomaceous earth (  / …
