** Orbital node, the points where an orbit crosses a plane of reference

** In astronomy ( orbital mechanics ), Ω refers to the longitude of the ascending node of an orbit

** In astronomy ( orbital mechanics ), as designation of the argument of periapsis of an orbit

** John Glenn, the first American to orbit the earth, resigns from the space program.

** Space: 1999 ( 1975 – 1977 ): A huge explosion sends the Moon hurtling out of Earth's orbit on September 13 ( a Friday in the series, but not in reality ).

** Space Age – Sputnik program: The Soviet Union launches Sputnik 1, the first artificial satellite to orbit the earth.

** A Soviet satellite containing live animals and plants is launched into orbit.

** The Soviet Union launches Luna 10, which later becomes the first space probe to enter orbit around the Moon.

** Lunar Orbiter 1, the first U. S. spacecraft to orbit the moon, is launched.

** STS 40: Space Shuttle Columbia carries the Spacelab into orbit.

** NASA's Explorer 1, the first American satellite and Explorer program spacecraft, reenters Earth's atmosphere after 12 years in orbit.

** The United Kingdom becomes the 6th nation to launch a satellite into orbit, the Prospero X-3, using a Black Arrow carrier rocket.

** Gemini 6 and Gemini 7 perform the first controlled rendezvous in Earth orbit.

** The Soviet manned space mission Soyuz 18a ends in failure during its ascent into orbit when a critical malfunction occurs in the second and third stages of the booster rocket during staging, resulting with the cosmonauts and their Soyuz spacecraft having to be ripped free from the vehicle.

** Pluto moves inside Neptune's orbit for the first time since either was known to science.

** The first of 24 Global Positioning System satellites is placed into orbit.

** The Envisat environmental satellite successfully reaches an orbit 800 km above the Earth using an Ariane 5 on its 11th launch, carrying the heaviest payload to date at 8, 500 kg.

** A higher Earth orbit ; these have included:

** Payload to Lunar orbit 47, 000 kg

** Payload to geostationary transfer orbit 3, 810 kg ( 8, 390 lb )

** Sputnik 1, the first man-made satellite to be launched into orbit

** Eclipsing binaries, double stars where, as seen from Earth's vantage point the stars occasionally eclipse one another as they orbit.

** Launched January 4, 1963 ( failed to escape orbit and decayed back into the atmosphere after just one day )

** Launched March 12, 1965 ( failed to escape orbit and decayed back into the atmosphere after five days )

** Minimum level required for POWER4 hardware and the last release that worked on the Micro Channel architecture

** last version was 1. 3, 1992.

** last version was 2. 2. 1.

** The latest possible date for Easter Sunday, last in 1943.

** Tacitus on Claudius ' last years, book 12

** Commodore 128 ( or C128, CBM 128, or C = 128 ), a home / personal computer introduced in January 1985, the last 8-bit machine commercially released by Commodore Business Machines

** First name, last name

** First name, last name

** First name, last name

** Aðfangadagskvöld, the day when the 13th and the last Yule Lad arrives to towns.

** Emilio Aguinaldo, the last President of the Supreme Government Council 23 March 1897-16 December 1897 and chairman of the Revolutionary Government from 23 June to 1 November 1897, was dictator from 12 June 1898-23 January.

** Nazarov was Dictator of the Don Republic ( which before, since its founding on 2 December 1917 at Novocherkassk, had been governed by a Triumvirate including the last pre-Soviet Ataman, Aleksei Maksimovich Kaledin ) from 11 February 1918 till 25 February 1918 when Bolshevik troops ended their existence

** At the last letter of a word, the vowel point reflects the inflection case or conjugation mood.

** Empire Earth: the last mission of the German campaign is to carry out Operation Sea Lion

** Part of the mission patch for STS-135, as it was the last mission of the Space Shuttle program.

** Parity flag in computing, indicates if the number of set bits is odd or even in the binary representation of the result of the last operation

Poor reception of the album both by the public and reviewers led the band to take out a page-sized ad in the local music press declaring " Why Don't You All Get Fu ** ed " ( title of one of their songs ) and they played their last performance on 8 June in Kalgoorlie.

** a third test prepared by each examining board based on the programmes of all the subjects of the last year of study

** Ukrainian journalist Georgiy Gongadze is last seen alive ; this day is taken as the commemoration date of his death.

** Elvis Presley holds his last concert at Market Square Arena in Indianapolis.

** The last natural smallpox case is discovered in Merca district, Somalia.

** The last two executions in The Netherlands take place.

** Western Australia becomes the last Australian state to abolish capital punishment.

** Shlomyah ben Pinhas, Samaritan High Priest ; last of the Phineas bloodline

** British battleship HMS Britannia is sunk by German submarine U-50 off Trafalgar with the loss of around fifty lives, the last major naval engagement of WWI.