initial orbit
91Space habitat — A pair of O Neill cylinders …
92Orbital spaceflight — Discovery rockets to orbital velocity, seen here just after booster separation An orbital spaceflight (or orbital flight) is a spaceflight in which a spacecraft is placed on a trajectory where it could remain in space for at least one orbit. To… …
93calendar — 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 …
94Project Mercury — Duration 1959 1963 Goal Place Americans into orbit for as long as one day Achievements First manned flight: May 5, 1961 First orbital flight …
95Signals intelligence operational platforms by nation — This article is a subset article under the main article Signals intelligence, which addresses the unifying conceptual and technical factors and common technologies in this intelligence discipline. This article deals with current signals… …
96Mars Express — CG image of Mars Express Operator ESA Mission type Orbiter + Lander Satellite of …
97Trajectory — is the path a moving object follows through space. The object might be a projectile or a satellite, for example. It thus includes the meaning of orbit the path of a planet, an asteroid or a comet as it travels around a central mass. A trajectory… …
98climate change — Introduction periodic modification of Earth s climate brought about as a result of changes in the atmosphere as well as interactions between the atmosphere and various other geologic, chemical, biological, and geographic factors within the Earth …
99physical science, principles of — Introduction the procedures and concepts employed by those who study the inorganic world. physical science, like all the natural sciences, is concerned with describing and relating to one another those experiences of the surrounding… …
100Sputnik 1 — Infobox Spacecraft Name = Sputnik 1 Спутник 1 Organization = Council of Ministers of the USSR Major Contractors = OKB 1, Soviet Ministry of Radiotechnical Industry Mission Type = Atmospheric studies Satellite Of = Earth Launch = October 4, 1957,… …
