This is a partial list of artificial materials left on the Moon, many during the missions of the Apollo program.The table below does not include lesser Apollo mission artificial objects, such as a hammer and other tools, retroreflectors, Apollo Lunar Surface Experiments Packages, or the commemorative, artistic, and personal objects left by the twelve Apollo astronauts, such as the …

Classifications. The following is a list of types of orbits: . Centric classifications. Galactocentric orbit: An orbit about the center of a galaxy.The Sun follows this type of orbit about the Galactic Center of the Milky Way.; Heliocentric orbit: An orbit around the Sun.In the Solar System, all planets, comets, and asteroids are in such orbits, as are many artificial satellites and pieces of ...

First spacecraft in heliocentric orbit. USSR 4 January 1959 Moon: Luna 2: First impact. USSR 14 September 1959 Moon: Luna 3: First image of lunar far-side. USSR 7 October 1959 Earth: Discoverer 13: First satellite recovered from orbit. USA 11 August 1960 Earth: Korabl-Sputnik 2: First living beings recovered from orbit. USSR 19 August 1960 Earth

This is a list of astronomical observatories ordered by name, along with initial dates of operation (where an accurate date is available) and location. The list also includes a final year of operation for many observatories that are no longer in operation. While other sciences, such as volcanology and meteorology, also use facilities called observatories for research and …

Sun–Earth Lagrange points Sun–Earth L 1. L 1 is the Lagrange point located approximately 1.5 million kilometers from Earth towards the Sun. . Past probes. International Cometary Explorer, formerly the International Sun–Earth Explorer 3 (ISEE-3), diverted out of L 1 in 1983 for a comet rendezvous mission. Currently in heliocentric orbit.The Sun–Earth L 1 is also the point to …

Noted objects. One particularly distant body is 90377 Sedna, which was discovered in November 2003.It has an extremely eccentric orbit that takes it to an aphelion of 937 AU. Although it takes over 10,000 years to orbit, during the next 50 years it will slowly move closer to the Sun as it comes to perihelion at a distance of 76 AU from the Sun. Sedna is the largest known sednoid, …

A near-Earth object (NEO) is any small Solar System body whose orbit brings it into proximity with Earth.By convention, a Solar System body is a NEO if its closest approach to the Sun is less than 1.3 astronomical units (AU).If a NEO's orbit crosses the Earth's orbit, and the object is larger than 140 meters (460 ft) across, it is considered a potentially hazardous object (PHO).

Heliocentric orbit S-IVB-505N Apollo 10: May 18, 1969 Heliocentric orbit S-IVB-506 Apollo 11: July 16, 1969 Heliocentric orbit S-IVB-507 Apollo 12: November 14, 1969 Heliocentric orbit; believed to have been discovered as an asteroid in 2002 and given the designation J002E3: ... (* See List of artificial objects on the Moon for location.)

The Pioneer program was a series of NASA uncrewed space missions designed for planetary exploration. There were a number of missions in the program, most notably Pioneer 10 and Pioneer 11, which explored the outer planets and left the Solar System.Both carry a golden plaque, depicting a man and a woman and information about the origin and the creators of the …

Entered orbit on 20 October 1975; lander landed at 05:13 UTC on 22 October. First orbiter of Venus and first images from the surface of another planet. Proton-K/D: Venera 10 (4V-1 No.661) 14 June 1975: Lavochkin Soviet Union: Orbiter/Lander Successful Entered orbit on 23 October 1975; lander landed at 05:17 UTC on 25 October Proton-K/D: Venera ...