February 12, 1961 - Venera 1 - USSR Venus Flyby - 643.5 kg
Now in a solar orbit.

1962 - Aerobee Rocket - USA
Observed the first x-ray star.

January 26, 1962 - Ranger 3 - USA Lunar Hard Lander - 327 kg
Lunar probe missed the moon and is now in a solar orbit.

April 23, 1962 - Ranger 4 - USA Lunar Hard Lander - 328 kg
First US lunar impact of the Moon.

August 27, 1962 - Mariner 2 - USA Venus Flyby - 201 kg
On December 14, 1962, Mariner 2 arrived at Venus at a distance of 34,800 kilometers and scanned its surface with infrared and microwave radiometers, capturing data that showed Venus's surface to be about 425蚓 (800蚌). Three weeks after the Venus flyby Mariner 2 went off the air on January 3, 1963. It is now in a solar orbit.

October 18, 1962 - Ranger 5 - USA Lunar Flyby - 340 kg
Ranger 5 was to be a lander but became a flyby because of a spacecraft failure. It is now in a solar orbit.

October 24, 1962 - Mars 1962A - USSR Mars Flyby
Spacecraft failed to leave Earth orbit after the final rocket stage exploded.

November 1, 1962 - Mars 1 - USSR Mars Flyby - 893 kg
Communications failed en route.

November 4, 1962 - Mars 1962B - USSR Mars Lander
Failed to leave Earth orbit.

April 2, 1963 - Luna 4 - USSR Lunar Probe - 1,422 kg
Lunar 4 was intended to be a lunar lander but missed the Moon. It is now in an Earth Moon orbit.

January 30, 1964 - Ranger 6 - USA Lunar Hard Lander - 361.8 kg
Cameras failed; lunar probe impacted the surface of the Moon.

April 2, 1964 - Zond 1 - USSR Venus Flyby - 890 kg
Communication lost en route; now in a solar orbit.

July 28, 1964 - Ranger 7 - USA Lunar Hard Lander - 362 kg
Arrived on July 31, 1964, sent pictures back at a close range, and impacted the Moon.

November 5, 1964 - Mariner 3 - USA Mars Flyby - 260 kg
Mars flyby attempt. Solar panels did not open, preventing flyby. Mariner 3 is now in a solar orbit.

November 28, 1964-December 20, 1967 - Mariner 4 - USA Mars Flyby - 260 kg
Mariner 4 arrived at Mars on July 14, 1965 and passed within 9,920 kilometers of the planet's surface. It returned 22 close-up photos showing a cratered surface. The thin atmosphere was confirmed to be composed of carbon dioxide in the range of 5-10 mbar. A small intrinsic magnetic field was detected. Mariner 4 is now in a solar orbit.

November 30, 1964 - Zond 2 - USSR Mars Flyby
Contact was lost en route.

February 17, 1965 - Ranger 8 - USA Lunar Hard Lander - 366 kg
Ranger 8 arrived at the moon on February 20, 1965. It sent back high-resolution pictures until it impacted in Mare Tranquillitatis.

March 21, 1965 - Ranger 9 - USA Lunar Hard Lander - 366 kg
Lunar probe sent pictures of its impact on the moon.

May 9, 1965 - Luna 5 - USSR Lunar Soft Lander - 1,474 kg
The lunar soft-lander failed and impacted the moon.

June 8, 1965 - Luna 6 - USSR Lunar Soft Lander - 1,440 kg
Missed the moon and is now in a solar orbit.

July 18, 1965 - Zond 3 - USSR Lunar Flyby - 959 kg
Returned pictures of the lunar far side. It is now in a solar orbit.

October 4, 1965 - Luna 7 - USSR Lunar Soft Lander - 1,504 kg
Luna 7 failed and impacted the moon.