Previous missions to Jupiter have included only brief flybys of its moons because to slow down and go into orbit
using conventional trajectories takes "a colossal amount of fuel," Marsden says.
Interorbital has designed a space capsule called Neptune that will blast off from a platform in the ocean and then soar into orbit
It succeeded only too well, and a stunned United States replied with a stunt of its own, firing Explorer-1 into orbit
and beginning the space race in earnest.
It launched Sputnik, the first artificial satellite, into orbit
around the Earth.
In the absence of the chemical, natural and artificial recycling processes used on Earth, objects senc t into orbit
The Sun pulls the craft into orbit
, and this orbit carries it on its journey--just as the Earth orbits the Sun.
An electric field will accelerate the ions to high velocity as they shoot out of the rear of the craft, enabling the craft to slip into orbit
about Mercury rather than spiral into the sun.
The use of small and intermediate-sized satellites could reduce costs, get instruments into orbit
earlier and allow greater resiliency in case problems arise, says panel chairman Edward Frieman, director of the Scripps Institution of Oceanography in La Jolla, Calif.
An unexpected event occurred when Magellan jettisoned the solid-propellant rocket motor that had put it into orbit
. Spear says the jolt apparently caused one set of gyros in Magellan's positioning system to switch off and another set to take over.
Hiten's primary objective is simply to try out the technique ISAS has chosen to put satellites into lunar orbit: having one spacecraft come close enough to the moon for the lunar gravity to capture a second craft into orbit
. Project scientist Kuninori Uesugi says ISAS hopes Hiten will complete eight visits near the moon during the mission's planned one-year lifetime.
But when post-Challenger flight delays left NASA short of available shuttle space, project scientists redesigned the satellite so that it could ride a Delta 2 rocket into orbit
. Rather than travel into "deep space," this X-ray observatory will orbit Earth while scanning emissions from our galaxy and beyond.
The satellite carried four incandescent bulbs into orbit
, and these are essential to the imaging system.
But although the satellite went into orbit
in 1980, the continuous stream of data from some of its instruments goes back only to the repair mission (SN: 4/14/84, p.228), leaving seven years remaining.
Solar Max went into orbit
in 1980, and although it did detect one of the Air Force craft's six comets, it failed until recently to find any sun-grazers of its own.
The telescope is just now nearing completion, and before the Challenger explosion sent NASA's plans into disarray, it was scheduled to go into orbit
later this year.