true orbit
81Madonna Ciccone — Madonna (2008) Madonna 2006 …
82Madonna Louise Veronica Ciccone — Madonna (2008) Madonna 2006 …
83Madonna Louise Veronica Ciccone Ritchie — Madonna (2008) Madonna 2006 …
84Orbital period — For the music album, see Orbital Period (album). The orbital period is the time taken for a given object to make one complete orbit about another object. When mentioned without further qualification in astronomy this refers to the sidereal period …
85Heliocentrism — Heliocentric redirects here. For the albums, see Heliocentric (Paul Weller album) and Heliocentric (The Ocean Collective album). Heliocentric Universe …
86Astronomy on Mars — Mosaic of two different Mars Global Surveyor Mars Orbiter Camera (MOC) exposures of Earth, the Moon, and Jupiter from 2003 …
87Models of scientific inquiry — In the philosophy of science, models of scientific inquiry have two functions: first, to provide a descriptive account of how scientific inquiry is carried out in practice, and second, to provide an explanatory account of why scientific inquiry… …
88Ray of Light — Ray of Light …
89Laika — This article is about the Russian dog. For other meanings, see Laika (disambiguation). Laika Лайка In 1957, Laika became the first animal launched into orbit, paving the way for human spaceflight. This photograph shows her in a flight harness.… …
90calendar — calendrical /keuh len dri keuhl/, calendric, calendarial /kal euhn dair ee euhl/, calendarian, calendaric, adj. /kal euhn deuhr/, n. 1. a table or register with the days of each month and week in a year: He marked the date on his calendar. 2. any …
