planet(ary) system

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• Rossby number — The Rossby number, named for Carl Gustav Arvid Rossby, is a dimensionless number used in describing fluid flow. The Rossby number is the ratio of centrifugal to Coriolis accelerations.cite book |title=Coastal, Estuarial, and Harbour Engineers… …   Wikipedia

• Celestial mechanics — is the branch of astrophysics that deals with the motions of celestial objects. The field applies principles of physics, historically classical mechanics, to astronomical objects such as stars and planets to produce ephemeris data. Orbital… …   Wikipedia

• Retrograde and direct motion — Direct motion is the motion of a planetary body in a direction similar to that of other bodies within its system, and is sometimes called prograde motion. Retrograde motion is motion in the opposite direction. In the case of celestial bodies,… …   Wikipedia

• George Biddell Airy — Infobox Scientist box width = 300px name = Sir George Biddell Airy, FRS image width = 240px birth date = birth date|1801|07|27 birth place = Alnwick, Northumberland, England death date = death date and age|1892|01|02|1801|07|27 death place =… …   Wikipedia

• 16 Cygni Bb — Planetbox begin name=16 Cygni BbPlanetbox star star=16 Cygni B constell=Cygnus RA=RA|19|41|51.9720 DEC=DEC|+50|31|03.083 dist ly=70.5 dist pc=21.6 class=G2.5VbPlanetbox orbit semimajor=1.681 ± 0.097 eccentricity=0.681 ± 0.017 period=798.5 ± 1.0… …   Wikipedia

• HD 217107 b — Planetbox begin name = HD 217107 bPlanetbox star star = HD 217107 constell = Pisces ra = RA|22|58|15.54 dec = DEC|−2|23|43.39 dist ly = 64.3 ± 1 dist pc = 19.7 ± 0.3 class = G8IVPlanetbox orbit separation = position angle = semimajor = 0.074 ±… …   Wikipedia

• HD 217107 — Starbox begin name = HD 217107 Starbox observe epoch = J2000.0 constell = Pisces ra = RA|22|58|15.54 dec = DEC|−2|23|43.39 appmag v =+6.17 Starbox character class = G8IV b v = 0.744 u b = 0.42 variable = none Starbox astrometry radial v = −14.0… …   Wikipedia

• Stratospheric Observatory for Infrared Astronomy — Infobox Observatory name = SOFIA caption = The 747SP, which now serves as NASA s SOFIA, on a test flight in 1997. Still mostly in United Airlines livery, a black square was painted on the aft fuselage to indicate the area that would house the… …   Wikipedia

• Space suit — A space suit is a complex system of garments, equipment and environmental systems designed to keep a person alive and comfortable in the harsh environment of outer space. This applies to extra vehicular activity (EVA) outside spacecraft orbiting… …   Wikipedia

• Phobos program — Infobox Spacecraft Name = Phobos 2 Caption = Illustration of the Phobos spacecraft Organization = IKI Major Contractors = Mission Type = Orbiter Satellite Of = Mars Orbital Insertion Date = January 29, 1989 Launch = July 12, 1988 Launch Vehicle …   Wikipedia

• Regional Planetary Image Facility — The NASA Regional Planetary Image Facility (RPIF) is part of an international system of planetary image libraries that was established in 1977. These facilities maintain photographic and digital data, as well as mission documentation and… …   Wikipedia