Here are entered works on the determination of light intensities of heavenly bodies, including stars. Works on the art of measuring the position, distance, motion, etc., of the stars are entered under Astrometry
Photomontage -- New Zealand. : Under the aegis : The virtues / by Megan Jenkinson ; with essays by Marina Warner ... [and others] ; edited by Peter Shand
A noninvasive method for assessing BODY COMPOSITION. It is based on the differential absorption of X-RAYS (or GAMMA RAYS) by different tissues such as bone, fat and other soft tissues. The source of (X-ray or gamma-ray) photon beam is generated either from radioisotopes such as GADOLINIUM 153, IODINE 125, or Americanium 241 which emit GAMMA RAYS in the appropriate range; or from an X-ray tube which produces X-RAYS in the desired range. It is primarily used for quantitating BONE MINERAL CONTENT, especially for the diagnosis of OSTEOPOROSIS, and also in measuring BONE MINERALIZATION
Here are entered works about very large lightweight reflective surfaces on spacecraft for propulsion by pressure of sunlight
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Photon -- Struktur -- Wechselwirkung -- Kongress -- Ascona <2001>. : Photon 2001 : International Conference on the Structure and Interactions of the Photon including the 14th International Workshop on Photon-Photon Collisions : Ascona, Switzerland, 2-7 September 2001 / editors, Maria-Novella Kienzle-Focacci, Maneesh Wadhwa