California Rocket Society tested first hybrid rocket design in United States, using oxygen and carbon.

Bell flight 12. Nosewheel damaged. First powered flight of XS-1 # 1 aircraft. At Muroc Dry Lake, California.

Launched 15:05 local time. Reached 87.4 km. Carried Temp, composition, solar radiation (Naval Research Lab); biological experiments for Signal Corps Engineering Lab, University of Michigan.

AF flight 7. Date estimated.

U.S.-IGY scientific satellite equipment, including a radio transmitter and instruments for measuring temperature, pressure, cosmic rays, and meteoric dust encounters, was tested above earth for the first time, as a rocket containing this equipment was fired by the Navy to a 126-mile altitude.

Vanguard test. Rocket performance, satellite instrumentation test. Launched at 0931 local time. Reached 204 km.

State Committee for Defence Technology (GKOT) Decree 'On creation of Branch No. 1 of OKB-456' was issued.

President John F, Kennedy designated the Apollo program including essential spacecraft, launch vehicles, and facilities as being in the highest national priority category (DX) for research and development and for achieving operational capability.

Christopher C. Kraft, Jr., John D. Hodge, and William L. Davidson of MSC's light Operations Division met at Langley with a large contingent of that Center's research staff to discuss LaRC's proposed Manned Orbital Research Laboratory (MORL). Langley spokesmen briefed their Houston visitors on the philosophy and proposed program phases leading to an operational MORL. Kraft and his colleagues then emphasized the need for careful study of operational problems involved with the MORL, as well as those associated with the smaller crew ferry and logistics supply vehicles. Specifically, they cited crew selection and training requirements, the need for a continuous recovery capability, communications requirements, and handling procedures for scientific data.

Maximum Speed - 4608 kph. Maximum Altitude - 22680 m. First flight in scientific and advanced research series - carried aerial mapping camera.

Operation of a system of long range telephone-telegraph radiocommunication, and transmission of USSR Central Television programmes to the stations of the Orbita network.

Military navigation satellite.

Apollo 13 (AS-508) was launched from Pad A, Launch Complex 39, KSC, at 2:13 p.m. EST April 11, with astronauts James A. Lovell, Jr., John L. Swigert, Jr., and Fred W. Haise, Jr., aboard. The spacecraft and S-IVB stage entered a parking orbit with a 185.5-kilometer apogee and a 181.5-kilometer perigee. At 3:48 p.m., onboard TV was begun for five and one-half minutes. At 4:54 p.m., an S-IVB burn placed the spacecraft on a translunar trajectory, after which the CSM separated from the S-IVB and LM Aquarius. (The crew had named lunar module 7 Aquarius and CSM 109 Odyssey.) The CSM then hard-docked with the LM. The S-IVB auxiliary propulsion system made an evasive maneuver after CSM/LM ejection from the S-IVB at 6:14 p.m. The docking and ejection maneuvers were televised during a 72-minute period in which interior and exterior views of the spacecraft were also shown.

At 8:13 p.m. EST a 217-second S-IVB auxiliary propulsion system burn aimed the S-IVB for a lunar target point so accurately that another burn was not required. The S-IVB/IU impacted the lunar surface at 8:10 p.m. EST on April 14 at a speed of 259 meters per second. Impact was 137.1 kilometers from the Apollo 12 seismometer. The seismic signal generated by the impact lasted 3 hours 20 minutes and was so strong that a ground command was necessary to reduce seismometer gain and keep the recording on the scale. The suprathermal ion detector experiment, also deployed by the Apollo 12 crew, recorded a jump in the number of ions from zero at the time of impact up to 2,500 shortly thereafter and then back to a zero count. Scientists theorized that ionization had been produced by 6,300 K to 10,300 K (6,000 degrees C to 10,000 degrees C) temperature generated by the impact or that particles had reached an altitude of 60 kilometers from the lunar surface and had been ionized by sunlight.

Meanwhile back in the CSM/LM, the crew had been performing the routine housekeeping duties associated with the period of the translunar coast. At 30:40 ground elapsed time a midcourse correction maneuver took the spacecraft off a free-return trajectory in order to control the arrival time at the moon. Ensuring proper lighting conditions at the landing site. The maneuver placed the spacecraft on the desired trajectory, on which the closest approach to the moon would be 114.9 kilometers.

At 10:08 p.m. EST April 13, the crew reported an undervoltage alarm on the CSM main bus B, rapid loss of pressure in SM oxygen tank No. 2, and dropping current in fuel cells 1 and 3 to a zero reading. The loss of oxygen and primary power in the service module required an immediate abort of the mission. The astronauts powered up the LM, powered down the CSM, and used the LM systems for power and life support. The first maneuver following the abort decision was made with the descent propulsion system to place the spacecraft back in a free-return trajectory around the moon. After the spacecraft swung around the moon, another maneuver reduced the coast time back to earth and moved the landing point from the Indian Ocean to the South Pacific.

Weather continues cold and windy, but clear, at the cosmodrome. Leonov wants to take the DOS crews fishing on the Syr Darya River, but he is vetoed by the doctors. They were afraid they might catch cold.

Development of systems for air defence and the control of outer space.

Area survey photo reconnaissance satellite; returned film capsule; separated capsule (?).

Military navigation satellite.

Covered Oko constellation plane 7 - 163 degree longitude of ascending node.

Civilian naval navigation satellite.

Positioned in geosynchronous orbit at 139 deg W in 1983-1991; 131 deg W in 1991-1992 As of 5 September 2001 located at 148.59 deg W drifting at 1.499 deg W per day. As of 2007 Mar 10 located at 90.26E drifting at 1.535W degrees per day.

Successfully captured and repaired Solar Max satellite.

Soyuz T-10 landed at 10:50 GMT, 160 km E Dzehezkazgan, with the crew of Malyshev, Sharma and Strekalov aboard.

Removed bag from docking unit that interfered with Kvant docking.

Military cartographic satellite; returned film capsule.

Polar Orbiting Geomagnetic Survey satellite designed to measure the Earth's magnetic field vector as a function of position. Data from the experiment was used to improve Earth navigation systems, and was stored in an experimental solid state recorder. Six low cost ground stations were designed, built and located around the world to operate the spacecraft flown on this mission.

TEX (Transceiver EXperiment) carried a variable power transmitter used to study ionospheric effects on RF transmissions. Data from the experiment was used to determine minimum spacecraft transmitter power levels for transmission to ground receivers.

SCE (Selective Communications Experiment) carried a variable frequency transmitter to study ionospheric effects at various RF frequencies, and was also designed to demonstrate message store and forward techniques.

250 orbits. In addition to Russian materials science experiments, Foton 6 carried out the French Gezon experiment using the Russian Zona-4M electric furnace (Foton spacecraft have also flown the Zona 1, Zona 4, Splav 2, and Konstanta 2 electric furnaces as well as the Kashtan electrophoresis unit). Foton 6, which also carried the European Biopan life sciences experiments, was successfully recovered on the 15th day.

Subsequent attempts to release it failed, reducing data return rate by an order of magnitude.

STS-37 landed at 13:56 GMT.

Glonass navigational satellite.

Glonass navigational satellite.

Glonass navigational satellite.

The cosmonauts began a series of three EVA's to install the new VDU station orientation engine (delivered by Progress M-38) into the Sofora boom. On this first spacewalk they disconnected the old engine (in use for six years) and pushed it into space.

At 1030 UTC the S0 truss was unberthed from Atlantis, and berthed to the Destiny module's Lab Cradle Assembly at 1346 UTC. At 1433 the Quest airlock was depressurized and the astronauts emerged to bolt in place the two forward MTS struts and deploy a trailing umbilical for the mobile transporter. The airlock was repressurized at 2224 UTC.

Delayed from November 9, 2004; January 19, March 18, 2005. Military Autonomous Rendezvous Technology. It tested navigation technologies for rendezvous that directly measured relative position to the target satellite. It was have to rendezvoused with several defunct American satellites. However it was only known to have conducted operations with its own Minotaur upper stage

The 53-minute orbit insertion burn begain at 07:10 GMT and left VEx the spacecraft in a highly elliptical polar orbit around Venus with an apoapsis of 350,000 km. A series of further engine burns would place the satellite in a 257 x 70,463 km orbit by 23 April..

Oceanographic satellite equipped with a 10-band ocean color scanner, a 4-band CCD imager with 250-meter resolution, and an infrared water profile radiometer.