Venus Orbiting Imaging Radar (VOIR; also called Venus Orbital Imaging Radar) was a planned 1983 U.S. spacecraft mission to Venus that was primarily intended...

Space-based radar or spaceborne radar is a radar operating in outer space; orbiting radar is a radar in orbit and Earth orbiting radar is a radar in geocentric...

scientists advocated for a radar mapping mission to Venus. They first sought to construct a spacecraft named the Venus Orbiting Imaging Radar (VOIR), but it became...

into an elliptical orbit around Venus on December 4, 1978. It returned data from Venus until October 1992. The spacecraft conducted radar altimetry observations...

80,000 volcanoes on Venus detected through radar mapping. For many years scientists debated on whether Venus was currently active or if the volcanic structures...

Shepard. Geophisics Research 97, 13.303. (1992) The Magellan Imaging Radar Mission to Venus, by W. T. K. Johnson. Proc. IEEE 79, 777. (1991) Planetary Landscapes...

from now, where it will become a Venus trojan orbiting at Venus' L5 point. During this time, its distance to Venus has been and will remain larger than...

of Venus refers to the process and results of human description of the geological features of the planet Venus. It involves surface radar images of Venus...

geological characteristics of Venus was stimulated by the refinement of imaging techniques between 1970 and 1985. Early radar observations suggested merely...

spacecraft. Radar provides the ability to study the shape, size and spin state of asteroids and comets from the ground. Radar imaging has produced images with...

Slade, Martin A.; Butler, Bryan J.; Muhleman, Duane O. (1992). "Mercury radar imaging – Evidence for polar ice". Science. 258 (5082): 635–640. Bibcode:1992Sci...

Venus snow is a brightening of the radar reflection from the surface of Venus at high elevations. The "snow" appears to be a mineral condensate of lead(II)...

Venus has an orbit with a semi-major axis of 0.723 au (108,200,000 km; 67,200,000 mi), and an eccentricity of 0.007. The low eccentricity and comparatively...

with the Pioneer Venus project, consisting of two separate missions: the Pioneer Venus Multiprobe and Pioneer Venus Orbiter, orbiting Venus between 1978 and...

elliptic orbit on 7 December 2015 by firing its attitude control thrusters for 20 minutes and made it the first Japanese satellite orbiting Venus. By using...

meaning Venus 15) was a spacecraft sent to Venus by the Soviet Union. This uncrewed orbiter was to map the surface of Venus using high resolution imaging systems...

Synthetic-aperture radar (SAR) is a form of radar that is used to create two-dimensional images or three-dimensional reconstructions of objects, such as...

Venus Volcano Imaging and Climate Explorer (VOICE) was a proposed orbiter mission to Venus by China National Space Administration. According to the proposal...

are based on imaging, radar, and altimetry data collected from several exploratory space probes, particularly Magellan, since 1961 (see Venus Exploration)...

probes were replaced with surface imaging radar equipment. Radar imaging was necessary to penetrate the dense cloud of Venus and both missions included identical...

(0.87 miles) in diameter and was the first asteroid to be modeled by radar imaging. It was discovered on 9 August 1989, by American astronomer Eleanor...

EnVision is an orbital mission to Venus being developed by the European Space Agency (ESA) that is planned to perform high-resolution radar mapping and atmospheric...

Atmosphere Venus Investigation of Noble gases, Chemistry, and Imaging) is a planned mission for an orbiter and atmospheric probe to the planet Venus. Together...

Venus that is almost spherical will need an outside push to maintain a Sun-synchronous orbit. The angular precession per orbit for an Earth orbiting satellite...

planet Venus in high resolution. The combination of topography, near-infrared spectroscopy, and radar image data will provide knowledge of Venus's tectonic...

most expensive Earth-imaging satellite. The NASA-ISRO Synthetic Aperture Radar, or NISAR satellite, will use advanced radar imaging to map the elevation...

years orbiting Saturn and studying the planet and its system after entering orbit on July 1, 2004. The voyage to Saturn included flybys of Venus (April...

studies of Venus's surface are necessary to fully understand this complex terrain. Pioneer Venus Orbiter detected regions of anomalous radar properties...

meaning Venus 16) was a spacecraft sent to Venus by the Soviet Union. This uncrewed orbiter was to map the surface of Venus using high resolution imaging systems...

A transit of Venus takes place when Venus passes directly between the Sun and the Earth (or any other superior planet), becoming visible against (and hence...