Orbital mechanics

Orbital mechanics or astrodynamics is the application of ballistics and celestial mechanics to the practical problems concerning the motion of rockets and other spacecraft. The motion of these objects is usually calculated from Newton's laws of motion and Newton's law of universal gravitation. It is a core discipline within space mission design and control. Celestial mechanics treats more broadly the orbital dynamics of systems under the influence of gravity, including both spacecraft and natural astronomical bodies such as star systems, planets, moons, and comets. Orbital mechanics focuses on spacecraft trajectories, including orbital maneuvers, orbit plane changes, and interplanetary transfers, and is used by mission planners to predict the results of propulsive maneuvers. General relativity is a more exact theory than Newton's laws for calculating orbits, and is sometimes necessary for greater accuracy or in high-gravity situations (such as orbits close to the Sun).

Arctic Ocean

The Arctic Ocean (also known as the Northern Ocean), located in the Northern Hemisphere and mostly in the Arctic north polar region, is the smallest and shallowest of the world's five major oceanic divisions. The International Hydrographic Organization (IHO) recognizes it as an ocean, although some oceanographers call it the Arctic Mediterranean Sea or simply the Arctic Sea, classifying it a mediterranean sea or an estuary of the Atlantic Ocean. Alternatively, the Arctic Ocean can be seen as the northernmost part of the all-encompassing World Ocean.

Almost completely surrounded by Eurasia and North America, the Arctic Ocean is partly covered by sea ice throughout the year (and almost completely in winter). The Arctic Ocean's surface temperature and salinity vary seasonally as the ice cover melts and freezes; its salinity is the lowest on average of the five major oceans, due to low evaporation, heavy fresh water inflow from rivers and streams, and limited connection and outflow to surrounding oceanic waters with higher salinities. The summer shrinking of the ice has been quoted at 50%. The US National Snow and Ice Data Center (NSIDC) uses satellite data to provide a daily record of Arctic sea ice cover and the rate of melting compared to an average period and specific past years.

Comeback

Comeback, The Comeback or Come Back may refer to:

General

Film

Music

Albums

Songs

University of Colorado

Coordinates: 39°44′43″N 104°59′00″W / 39.745196°N 104.983340°W / 39.745196; -104.983340

The University of Colorado system is a system of public universities in Colorado consisting of four campuses: University of Colorado Boulder, University of Colorado Colorado Springs, University of Colorado Denver in downtown Denver and at the Anschutz Medical Campus in Aurora. It is governed by an elected, nine-member Board of Regents of the University of Colorado.

The University of Colorado advances the economy, health and culture of Colorado and beyond, educating more than 435,000 students who have become catalysts in business, arts, health and community growth. CU’s four campuses feature top-tier faculty and hands-on learning opportunities in an environment where students thrive. Students and faculty at CU's four campuses are involved with research and learning that advances communities in Colorado and around the globe.

The University of Colorado's official abbreviation is CU, not the more intuitive "UC". This is to avoid confusion with the University of California system (founded in 1868), which at the time of the creation of the CU system was already referred to as UC.

Baby Come Back

Baby Come Back may refer to:

See also