ORBit

1483   Orbital calculations suggest that on this day Pluto moved inside Neptune's orbit until July 23, 1503.

1964   The Soviet Union launches the Voskhod 1 into Earth orbit as the first spacecraft with a multi-person crew and the first flight without space suits.

1968   Apollo program: NASA launches ''Apollo 7'', the first manned Apollo mission (Wally Schirra, Donn Eisele, Walter Cunningham). Goals for the mission include the first live television broadcast from orbit and testing the lunar module docking maneuver.

1975   Apollo-Soyuz Test Project: An American Apollo and a Soviet Soyuz spacecraft dock with each other in orbit, marking the first such link-up between spacecraft from the two nations.

1988   In the Soviet Union, the uncrewed Shuttle ''Buran'' is launched by an Energia rocket on her maiden orbital spaceflight (the first and last space flight for the shuttle).

1990   The Space Shuttle ''Discovery'' places the Hubble Space Telescope into orbit.