universal time coordinates
41List of astronomy acronyms — This is a compilation of acronyms commonly used in astronomy. Most of the acronyms are drawn from professional astronomy and are used quite frequently in scientific publications. However, a few of these acronyms are frequently used by the general …
42Tokelau — For other uses, see Tokelau (disambiguation). Tokelau …
43Royal Observatory, Greenwich — The Royal Observatory, Greenwich (formerly the Royal Greenwich Observatory or RGO) was commissioned in 1675 by King Charles II, with the foundation stone being laid on 10 August. [ [http://www.thehistorychannel.co.uk/site/this day in history/this …
44Galilean transformation — The Galilean transformation is used to transform between the coordinates of two reference frames which differ only by constant relative motion within the constructs of Newtonian physics. This is the passive transformation point of view. The… …
45Starfish Prime — The debris fireball stretching along Earth s magnetic field [7] with air glow aurora as seen at 3 minutes from an RC 135 surveillance aircraft. Information …
46Tierra — «Planeta Tierra» redirige aquí. Para la serie documental, véase Planeta Tierra (documental). Para otros usos de este término, véase Tierra (desambiguación). Tierra …
47EgyptAir Flight 990 — SU GAP, the aircraft involved in the accident, at Düsseldorf in 1992. Occurrence summary Date …
48Atomic clock — Nuclear clock redirects here. For the clock as a measure for risk of catastrophic destruction, see Doomsday Clock. For a clock updated by radio signals (commonly but inaccurately called an atomic clock ), see Radio clock. For the album by Zion I …
49Hyperspace (science fiction) — Hyperspace is a fictional plot device sometimes used in science fiction. It is typically described as an alternate region of subspace co existing with our own universe which may be entered using an energy field or other device. Travel in… …
50Earth — This article is about the planet. For other uses, see Earth (disambiguation). Earth   …
