return orbit
31Constellation program — logo Constellation Program (abbreviated CxP) is a human spaceflight program within NASA, the space agency of the United States. The stated goals of the program were to gain significant experience in operating away from Earth s environment,… …
32Corona (satellite) — Discoverer redirects here. For the database software, see Oracle Discoverer. For the R.E.M. song, see Discoverer (song). KH 3 and KH3 redirect here. For the upcoming third game in the Kingdom Hearts series, see Kingdom Hearts (series). KH 4B… …
33List of Solar System probes — For a list of active probes only, see List of active Solar System probes. For a list of landers only, see Landings on other planets. This is a list of all space probes that have left Earth orbit (or were launched with that intention but failed),… …
34Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
35Apollo program — insignia Apollo 11 astronaut Buzz Aldrin walking o …
36space exploration — Investigation of the universe beyond Earth s atmosphere by means of manned and unmanned spacecraft. Study of the use of rockets for spaceflight began early in the 20th century. Germany s research on rocket propulsion in the 1930s led to… …
37Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
38Exploration of the Moon — Apollo 12 lunar module Intrepid prepares to descend towards the surface of the Moon. NASA photo. The physical exploration of the Moon began when Luna 2, a space probe launched by the Soviet Union, made an impact on the surface of the Moon on …
39Comet — This article is about the astronomical object. For other uses, see Comet (disambiguation). Comet Hale– …
40Halley's Comet — For the video game, see Halley s Comet (video game). 1P/Halley (Halley s Comet) Halley s Comet on March 8, 1986 Discovery …
