red shift of spectral lines
41Gravitational redshift — In physics, light or other forms of electromagnetic radiation of a certain wavelength originating from a source placed in a region of stronger gravitational field (and which could be said to have climbed uphill out of a gravity well) will be… …
42Balmer series — The Balmer series or Balmer lines in atomic physics, is the designation of one of a set of six different named series describing the spectral line emissions of the hydrogen atom.The Balmer series is calculated using the Balmer formula, an… …
43Beta Pictoris — Starbox begin name=Beta PictorisStarbox image caption=Map of the Pictor constellation showing the position of Beta Pictoris.Starbox observe epoch=J2000 ra=05h 47m 17.1scite web|url=http://simbad.u strasbg.fr/simbad/sim id?protocol=html… …
44NTSC — This article is about the television system. For the Indonesian government agency, see National Transportation Safety Committee. Television encoding systems by nation; countries using the NTSC system are shown in green. NTSC, named for the… …
45Schmidt , Maarten — (1929–) Dutch–American astronomer Born in Groningen in the Netherlands, Schmidt graduated from the university there in 1949 and obtained his PhD in 1956 from Leiden University. After working at the Leiden Observatory from 1953 to 1959, he moved… …
46Sirius — B redirects here. For other uses of Sirius, see Sirius (disambiguation). For other uses of Sirius B, see Sirius B (disambiguation). Sirius A / B …
47Cygnus X-1 — For other uses, see Cygnus X 1 (disambiguation). HDE 226868 HDE 226868 (not shown) is located next to the star η (lower center) in this map of constellation Cygnus …
48Alpha Andromedae — α Andromedae Observation data …
49Color photography — Color film redirects here. For the motion picture equivalent, see Color motion picture film. A circa 1850 Hillotype photograph of a colored engraving. Long believed to be a complete fraud, recent testing found that Levi Hill s process did… …
50Spectroscopy — Analysis of white light by dispersing it with a prism is example of spectroscopy. Spectroscopy ( …
