The term most commonly applies to a spacewalk made outside a craft orbiting Earth ( such as the International Space Station ), but also has applied to lunar surface exploration ( commonly known as moonwalks ) performed by six pairs of American astronauts in the Apollo program from 1969 to 1972.

The Russian plan called for a lone cosmonaut to land on the moon, return to lunar orbit, then make a spacewalk back from the landing craft to orbiting spacecraft after docking.

The main function of the EP-1 mission was to swap Soyuz craft with the orbiting crew, in so doing freeing a docking port for a forthcoming supply tanker.

Ronan the Accuser acts as warden from an orbiting space craft.

MOND can also be interpreted as a modification of inertia, perhaps due to an interaction with vacuum energy, and such a trajectory-dependent theory could account for the different accelerations apparently acting on the orbiting planets and the Pioneer craft on their escape trajectories.

Players can also acquire technologies by exchange or diplomatic threats, spying, hiring colonial leaders or ship commanders with knowledge of certain technologies, planetary conquest, capturing and dismantling enemy ships, random events, or by stumbling upon it in a derelict craft orbiting a newly discovered planet.

The distance of an orbiting craft or satellite to the Earth also affects its utility: the lower the craft, the better its observational capacity in monitoring events on the Earth's surface ; the further away the craft's orbit, the more easily a stable orbit is achieved.

The TKS module would remain in orbit until it docked automatically to Salyut 6 on June 19, as the first successful expansion of an orbiting craft, an accomplishment described as " an important step toward the later development of Mir and the International Space Station.

A star in a solar system is the source of light which creates the stellar day, the rotation period of orbiting planets regulates the seasons on a planet surface, this combination is monitored and recorded by a calendar.

With de Broglie's suggestion of the existence of electron matter waves in 1924, and for a short time before the full 1926 Schrödinger equation treatment of hydrogen like atom, a Bohr electron " wavelength " could be seen to be a function of its momentum, and thus a Bohr orbiting electron was seen to orbit in a circle at a multiple of its half-wavelength ( this historically incorrect Bohr model is still occasionally taught to students ).

Hipparcos also suggested that Arcturus is a binary star, with the companion about twenty times dimmer than the primary and orbiting close enough to be at the very limits of our current ability to make it out.

Following the discovery, starting in the 1990s, of other Kuiper belt objects, Pluto began to be seen not as a planet orbiting alone at 40 AU, but as the largest of a group of icy bodies in that region of space.

Shoemaker – Levy 9, at the time captured by and orbiting Jupiter, was located on the night of March 24, 1993, in a photograph taken with the Schmidt telescope at the Palomar Observatory in California.

Orbital studies of the new comet soon revealed that it was orbiting Jupiter rather than the Sun, unlike all other comets known at the time.

Planet-search programs have discovered planets orbiting a substantial fraction of the stars they have looked at.

The Sagittarius dwarf galaxy is orbiting our galaxy at almost a right angle to the disk.

More importantly, the discovery of celestial bodies orbiting something other than the Earth dealt a blow to the then-accepted Ptolemaic world system, which held that the Earth was at the center of the universe and all other celestial bodies revolved around it.

Most of this dust is orbiting the Sun in about the ecliptic plane, with a possible concentration of particles at the Earth – Sun Lagrangian point.

In August 2010, a European astronomical team working at the La Silla Observatory in Chile announced that they had confirmed the presence of at least five planets orbiting the star HD 10180 in Hydrus.

In 1954, JPL teamed up with Wernher von Braun ’ s rocketeers at the Army Ballistic Missile Agency ’ s Redstone Arsenal in Huntsville, Alabama, to propose orbiting a satellite during the International Geophysical Year.

* Silvereyes is, at the time of Ringworld, the furthest Human world from Earth ( 21. 3 light-years, 60 days at Quantum-I hyperdrive speeds ), orbiting Beta Hydri.

The five Lagrangian points ( marked in green ) at two objects orbiting each other ( here a yellow star and a blue planet ) in an anti-clockwise circle

This difference is caused by the fact that the Earth-Moon system is orbiting around the Sun at the same time the Moon is orbiting around the Earth.

In 1932, Estonian astronomer Ernst Öpik postulated that long-period comets originated in an orbiting cloud at the outermost edge of the Solar System.

An object following a parabolic orbit moves at the exact escape velocity of the object it is orbiting, while elliptical orbits are slower and hyperbolic orbits are faster.

It consists of two large spiral galaxies in the process of colliding with their nuclei orbiting at a distance of 1, 200 light-years, causing extensive star formation throughout both components.

Columbia was successfully launched on April 12, 1981, the 20th anniversary of the first human spaceflight ( Vostok 1 ), and returned on April 14, 1981, after orbiting the Earth 36 times, landing on the dry lakebed runway at Edwards Air Force Base in California.

He noted that a " celestial castle " at the top of such a spindle-shaped cable would have the " castle " orbiting Earth in a geostationary orbit ( i. e. the castle would remain over the same spot on Earth's surface ).

Recent measurements of its motion indicate that it is moving at per second in the direction of the Andromeda Galaxy, which has led astronomers to surmise that it may actually be orbiting the larger galaxy.

The bulk of the disk appears to be orbiting Tau Ceti at a distance of 35 –, well outside the orbit of the habitable zone.

Computer controlled motorized parabolic dish antenna for tracking Low Earth orbit | LEO weather satellites. Polar orbiting weather satellites circle the Earth at a typical altitude of 850 km ( 530 miles ) in a north to south ( or vice versa ) path, passing over the poles in their continuous flight.

The experiment planned to check, very precisely, tiny changes in the direction of spin of four gyroscopes contained in an Earth satellite orbiting at 650 km ( 400 mi ) altitude, crossing directly over the poles.

Its original goal was to visit Apollo landing sites ; later variants of the original design would explore near the Moon's poles, where orbiting satellites found indications that valuable ice deposits may lurk in permanently shadowed polar impact craters.

The main job of the lower class is heatsinking, where workers supervise the conversion of heat from the planet's core directly into electric power by sinking extremely long rods into the inner core of the planet ( the three other major sources of electric power were hydroelectric dams on the underground rivers, fusion energy, and solar energy from Trantor's sun, both from rooftop solar arrays and from solar energy satellites orbiting Trantor that beamed microwave energy to the surface ); ' heatsinkers ' were generally looked down upon by other Dahlites.

Tracing back the comet's orbital motion revealed that it had been orbiting Jupiter for some time.

During the 1950s and 1960s, Peter van de Kamp of Swarthmore College made another prominent series of detection claims, this time for planets orbiting Barnard's Star.

To support this, and other Apollo objectives, the Gemini program was spun off to develop the capability for astronauts to work outside a two-man Earth orbiting spacecraft.

His predictions included that man-made satellites had been orbiting the earth for 50 years.

In the classical view, the energy of an electron orbiting an atomic nucleus is larger for orbits further from the nucleus of an atom.

If the heavier body is much more massive than the smaller, as for a satellite or small moon orbiting a planet or for the Earth orbiting the Sun, it is accurate and convenient to describe the motion in a coordinate system that is centered on the heavier body, and we say that the lighter body is in orbit around the heavier.

There are also specific terms for orbits around particular bodies ; things orbiting the Sun have a perihelion and aphelion, things orbiting the Earth have a perigee and apogee, and things orbiting the Moon have a perilune and apolune ( or periselene and aposelene respectively ).

Orbital decay can occur due to tidal forces for objects below the synchronous orbit for the body they're orbiting.

This mechanism is extremely weak for most stellar objects, only becoming significant in cases where there is a combination of extreme mass and extreme acceleration, such as with black holes or neutron stars that are orbiting each other closely.

Often one is interested in the case where then N particles are all of the same type ( for example, the 18 electrons orbiting a neutral argon nucleus ).

Odo later worked for the Cardassians during the Occupation of Bajor aboard the orbiting Terok Nor ore-processing space station, and later for the Bajorans / Federation aboard Deep Space Nine ( the Federation name for Terok Nor ), in both cases as chief of security.

The Svalbard Undersea Cable System is a fibre optic lines from Svalbard to Harstad, needed for communicating with polar orbiting satellite through Svalbard Satellite Station and installations in Ny-Ålesund.

He described the use of orbiting spacecraft for detailed peaceful and military observation of the ground and described how the special conditions of space could be useful for scientific experiments.

In the classical view, the energy of an electron orbiting an atomic nucleus is larger for orbits further from the nucleus of an atom.

The experiment validated stabilization, tracking, and pointing concepts and proved that a laser could be relayed from the ground to a 60 cm mirror on an orbiting satellite and back to another ground station with a high degree of accuracy and for extended durations.