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USA (NASA) OAO-2: 21 December 1968: First human excursion beyond low Earth orbit. First in-person observations of Earth from a distance. First Trans-Earth injection. USA (NASA) Apollo 8 [23] 24 December 1968 First human flight to another celestial body (the Moon) and to enter its gravitational influence. USA (NASA) Apollo 8 [23] January 1969
This is a timeline of Solar System exploration ordering events in the exploration of the Solar System by date of spacecraft launch. It includes: It includes: All spacecraft that have left Earth orbit for the purposes of Solar System exploration (or were launched with that intention but failed), including lunar probes .
The first major Arabic work of astronomy is the Zij al-Sindh by Muhammad ibn Musa al-Khwarizmi. The work contains tables for the movements of the Sun, the Moon, and the five planets known at the time. The work is significant as it introduced Ptolemaic concepts into Islamic sciences. This work also marks the turning point in Arabic astronomy.
This is a timeline of known spaceflights, both crewed and uncrewed, sorted chronologically by launch date. Due to its large size, the timeline has been split into smaller articles, one for each year since 1951. There is a separate list for all flights that occurred before 1951.
NASA's first attempt to land a spacecraft on the Moon. A series of malfunctions caused spacecraft to hurtle past the Moon. [6] April 23 US: Ranger 4: Atlas-Agena: Moon Partial failure: Was the first U.S. spacecraft to reach another celestial body. Failure in the onboard computer prevented it from carrying out its scientific objectives.
c. 1030 – In his major astronomical work, the Mas'ud Canon, Al-Biruni observed that, contrary to Ptolemy, the Sun's apogee (highest point in the heavens) was mobile, not fixed. [46] 1031 – Chinese astronomer and scientist Shen Kuo calculates the distance between the Earth and the Sun in his mathematical treatises. [47] [failed verification]
Eight years later, the ownership of the channel was privatized and its name was changed to The Learning Channel. It showcased documentaries on a variety of topics, like "Paleoworld" and "Amazing ...
NASA's goal with this new space capsule is to carry humans to Mars. The Orion spacecraft is due to be completed in the early 2020s. NASA is hoping that this mission will "usher in a new era of space exploration." [32] Another major factor affecting the current Space Age is the privatization of space flight. [34]