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| A cover commemorating Luna 1, postmarked with a black and a red Moscow K-9 special hand cancel. |
Luna 1 was the Soviet Union’s first successful spacecraft to reach the vicinity of the Moon. Launched from Baikonur on January 2, 1959, it was originally intended to impact the lunar surface. A guidance error caused the upper stage to impart too much velocity, and the spacecraft missed the Moon by about 6,400 km.
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| Photo: An illustration depicting Luna 1’s orbit around the Sun. |
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| A cover commemorating Luna 1, postmarked with two black Moscow K-9 special hand cancel, signed by Alexei Leonov, the first cosmonaut to walk in space. |
Instead of crashing into the Moon, Luna 1 passed the lunar vicinity about 34 hours after launch and entered heliocentric orbit, becoming the first human-made object to orbit the Sun. It was initially referred to in Soviet announcements as the “Soviet Space Rocket” or Mechta ("Dream"); the name Luna 1 was assigned retroactively in 1963. The spacecraft carried several scientific instruments, including a magnetometer, radiation detectors, ion traps, and micrometeorite detectors. It made important measurements of the space environment between Earth and the Moon and provided evidence that the Moon did not possess a detectable global magnetic field.
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| A cover commemorating Luna 1, postmarked with two black Moscow special hand cancel. |
An interesting experiment took place on January 3, when the attached upper stage released about 1 kilogram of sodium at a distance of roughly 113,000 km from Earth. The resulting artificial comet-like cloud was photographed by astronomers on Earth, providing a visible marker for tracking the spacecraft.
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| A Luna 1 First Day Cover postmarked in Moscow with a hand cancel on April 13, 1959. |
Luna 1 marked a major milestone in early lunar and deep-space exploration. Although it missed its intended lunar impact, it became the first human-made object to reach the vicinity of the Moon and perform a lunar flyby on January 4, 1959. Its trajectory also carried it beyond Earth’s gravitational influence and into orbit around the Sun, making it the first human-made object to achieve a heliocentric orbit.
