background brightness
101Cephalopod — Cephalopods Temporal range: Devonian – Recent[1] (Stem groups from Cambrian)[2] …
102X-ray astronomy — X rays start at 0.008 nm and extend across the electromagnetic spectrum to 8 nm, over which the Earth s atmosphere is opaque. X ray astronomy is an observational branch of astronomy which deals with the study of X ray observation and detection… …
103Tired light — is a class of hypothetical redshift mechanisms that were proposed as an alternative explanation for the redshift distance relationship as alternatives to the Big Bang and the Steady State cosmologies, both of which proposed that Hubble s law was… …
104Bicycle lighting — has two purposes: seeing and being seen. There are many types of bicycle lights available, each with its own advantages and disadvantages. There is no one best solution for any rider, and many riders mix and match different technologies to… …
105Impulsive highlighting — is a term for clicking repeatedly on text on a computer while reading it and consequently highlighting it.Fact|date=March 2008The word highlighting is synonymous with selecting in modern day computer terminology.Practical usesRevealing… …
106Lasers and aviation safety — Under certain conditions, laser light or other bright lights (spotlights, searchlights) directed at aircraft can be a hazard. The most likely scenario is when a bright visible laser light causes distraction or temporary flash blindness to a pilot …
107Planetary nebula luminosity function — (PNLF) is a secondary distance indicator used in astronomy. It makes use of the [O III| [O III] λ5007 forbidden line found in all planetary nebula which are members of the old stellar populations (Population… …
108Exoplanetology — is the Art and Science of Exoplanets and the search for Life on other Worlds. It is formally defined as the study of the characteristics, formation and fate of planets outside our solar system. The discovery of extrasolar planets or exoplanets in …
109Maemo — Screenshot of Maemo 5 Company / developer open s …
110Comparison of iOS e-book reader software — Contents 1 Navigation features 2 Display features 3 Edit/tool features 4 Book source management features …
