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Explorer 1 was designed and built by California Institute of Technology 's JPL under the direction of Dr. William Hayward Pickering. It was the second satellite to carry a mission payload (Sputnik 2 was the first). The total mass of the satellite was 13.97 kg (30.8 lb), of which 8.3 kg (18 lb) were instrumentation.
Launched by US, The First Indonesian GEO Satellite for domestic Communication 1977 US: HEAO-1: Earth: Success: X-ray satellite US: Voyager 1 Voyager 2: Jupiter: Success: Sent back images of Jupiter and its system Soviet Union: Kosmos 954: Earth: Success: Reconnaissance satellites 1978 US: Pioneer Venus 1: Venus: Success: Orbiter US: Pioneer ...
Vanguard 1. Vanguard 1 (Harvard designation: 1958-Beta 2, [3] COSPAR ID: 1958-002B [1]) is an American satellite that was the fourth artificial Earth-orbiting satellite to be successfully launched, following Sputnik 1, Sputnik 2, and Explorer 1. It was launched 17 March 1958.
First communications satellite in geostationary orbit. First Olympic broadcast to international audiences. First tandem satellite broadcast (with Relay 1) August 19, 1964. United States. OSCAR-III. First amateur radio communications satellite (relay/transponder); first OSCAR powered by solar cells. March 9, 1965.
List of USA satellites. This is a list of satellites and spacecraft which have been given USA designations by the United States Air Force. These designations have been applied to most United States military satellites since 1984, and replaced the earlier OPS designation. As of June 2022, USA designations have been assigned to 331 space satellites.
Explorers Program. An Explorer mission observes Sagittarius A*, the Milky Way's central black hole, flaring. The Explorers program [1] is a NASA exploration program that provides flight opportunities for physics, geophysics, heliophysics, and astrophysics investigations from space. Launched in 1958, Explorer 1 was the first spacecraft of the ...
These images represent radar observations of Apophis on March 8, 9 and 10, 2021, as it made its last close approach before its 2029 Earth encounter.
5 March 1958. U.S. Army Ballistic Missile Agency. Failed to orbit. Vanguard 1. United States. 17 March 1958. U.S. Naval Research Laboratory. Oldest artificial satellite in orbit, along with its upper stage. Explorer 3.