galactic coordinate
61Retrograde motion — This article is about retrograde motions of celestial bodies relative to a gravitationally central object. For the apparent motion as seen from a particular vantage point, see Apparent retrograde motion. Retrograde orbit: the satellite (red)… …
62ΔT — This article is about the time difference. For the temperature difference, see psychrometrics. ΔT vs. time from 1657 to 1984[1] ΔT, Delta T, delta T, deltaT, or DT is the time difference obtained by subtracting Universal Time (UT) from… …
63Lunar calendar — A lunar calendar is a calendar that is based on cycles of the lunar phase. A common purely lunar calendar is the Islamic calendar or Hijri calendar. A feature of the Islamic calendar is that a year is always 12 months, so the months are not… …
64Orders of magnitude (time) — Contents 1 Seconds 2 See also 3 Years 4 See also 5 Footnotes …
65Cosmological decade — A cosmological decade ( CÐ ) is a division of the lifetime of the cosmos. The divisions are logarithmic in size, on base 10. Each successive cosmological decade represents a ten fold increase in the total age of the universe.[1] As expressed in… …
66Metric expansion of space — Physical cosmology Universe · Big Bang …
67List of ships in Battlestar Galactica (2004) — There have been many appearances of various spacecraft in the re imagined Battlestar Galactica science fiction television series, with the primary means of travel being FTL. Contents 1 Ships 1.1 Adriatic …
68Equinox — This article is about the astronomical event when the sun is at zenith over the Equator. For other uses, see Equinox (disambiguation). For the same event happening on other planets and setting up a celestial coordinate system, see Equinox… …
69Longitude — For Dava Sobel s book about John Harrison, see Longitude (book). For the adaptation of Sobel s book, see Longitude (TV series). Map of Earth Longitude (λ) Lines of longitude appear vertical with varying curvature in this projection, but are… …
70List of minor Star Wars Rebel characters — This is a list of minor characters in the fictional Star Wars universe who are part of the Rebel Alliance.Antilles, RaymusSW Character name=Raymus Antilles caption= color=Rebels source= position=Captain of the Tantive IV, prince of Alderaan… …
