earth-centered orbit
71Satellite navigation — Geodesy Fundamentals Geodesy · …
72Equinox — 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… …
73Atmospheric reentry — refers to the movement of human made or natural objects as they enter the atmosphere of a planet from outer space, in the case of Earth from an altitude above the edge of space. This article primarily addresses the process of controlled reentry… …
74Geology of Mars — Mars   Mars as seen by the Hubble Space Telescope Designations …
75Impact event — Artist s impression of a major impact event. The collision between Earth and an asteroid a few kilometers in diameter may release as much energy as several million nuclear weapons detonating simultaneously. An impact event is the collision of a… …
76Transit of Phobos from Mars — [ right|240px|thumbnail|Phobos transits the Sun, as seen by Mars Rover Opportunity on March 10 2004] A transit of Phobos across the Sun as seen from Mars takes place when Phobos passes directly between the Sun and a point on the surface of Mars,… …
77Cosmic Background Explorer — (COBE) General information NSSDC ID 1989 089A Organization NASA …
78Laser Interferometer Space Antenna — For other uses of this acronym, see LISA (disambiguation). Laser Interferometer Space Antenna Artist s conception of LISA spacecraft Operator ESA, NASA Satellite of Sun The Laser Interfe …
79Mars 96 — Model of the Mars 96 Orbiter Operator Russian Space Forces Mis …
80Kolob — Detail of Joseph Smith Hypocephalus, which according to Joseph Smith, Jr. contains a representation of Kolob (reference numeral 1). According to Egyptologists, this depicts an Egyptian creation god. Kolob is a star or planet described in Mormon… …
