Soviet space dogs
Soviet space dogs were at the center of a proof-of-concept. The question was whether a living body could survive rocket flight and return from orbit before a human was risked. The program ran from 1951 to 1966. Dozens of animals took part in suborbital and orbital flights across those two decades. Laika, launched on the 3rd of November 1957, became the program's most recognized name. She was not the first dog the program sent to space, nor the last. Which animals were chosen, and why? What happened on the missions that failed? The full record includes improvised substitutions and fatalities kept secret for decades. Two dogs would later survive a night inside a crashed capsule buried in a Siberian snowfield.
Scientists chose stray dogs from Moscow's streets rather than household pets. They reasoned that animals hardened by outdoor life would better endure the extremes of spaceflight. Female dogs were preferred for two reasons. Their temperament was judged calmer, and the waste-collection suit worn inside the capsule was designed to function only with female anatomy.
Dogs in training endured up to twenty consecutive days sealed inside small boxes, adjusting their bodies to the module's confined interior. They rode centrifuges that simulated the forces of liftoff and spent time in pressure chambers built to replicate high-altitude conditions. For the orbital missions that came later, engineers prepared a specialised food: a jelly made from breadcrumbs, powdered meat, and beef fat.
When the first flights began, the dogs wore pressure suits fitted with acrylic glass bubble helmets.
Dezik and Tsygan, whose name means "Gypsy," were loaded into a capsule atop an R-1 rocket on the 22nd of July 1951. The R-1 was a Soviet adaptation of the German wartime V-2. Their flight reached a maximum altitude of 110 km. Both were recovered unharmed, the first animals to make a suborbital flight and return alive.
Dezik flew again a week later, on the 29th of July 1951, alongside a dog named Lisa. The parachute failed to deploy, and neither survived. Tsygan, spared from that second flight, was adopted as a pet by Soviet physicist Anatoli Blagonravov.
Fifteen scientific flights ran on R-1 rockets between 1951 and 1956. Eleven more missions on the R-2A series from 1957 to 1960 climbed to around 200 km. Three flights on R-5A rockets in 1958 reached approximately 450 km. Not all ended well. Two dogs died in May 1957 when their capsule lost pressure. Two more perished in October 1958 when the parachute failed. Others were safely recovered.
Smelaya, whose name means "Brave," vanished the night before her launch in August 1951. She returned the following morning, flew, and was safely recovered. On the 3rd of September 1951, a dog named Bobik escaped during a walk before his scheduled flight. An untrained stray found running on the launch base was rushed in as a replacement. Given the acronym ZIB, from a Russian phrase meaning "Substitute for Missing Bobik," the dog flew and was recovered safely. ZIB was later adopted by Anatoli Blagonravov, joining Tsygan in the physicist's household.
Albina made two successful flights in June 1956 and was shortlisted as a backup candidate for the first orbital mission. She would never fly in orbit.
Laika flew under three other names: Kudryavka, meaning "Little Curly," Zhuchka, or "Little Bug," and Limonchik, "Little Lemon." The American press christened her "Muttnik," a pun on Sputnik. She died between five and seven hours into her flight from overheating and stress.
The official Soviet account claimed she had survived for several days before her oxygen ran out. That account stood for decades. The truth was not made public until October 2002. At a Moscow press conference in 1998, a senior scientist who had worked on the program spoke plainly about the cost. "The more time passes, the more I'm sorry about it," he said. "We did not learn enough from the mission to justify the death of the dog."
Almost three years passed before the program put another dog into orbit.
Belka and Strelka launched on the 19th of August 1960 aboard Korabl-Sputnik 2 and spent a full day in orbit. Belka's name means "Squirrel" or "Whitey"; Strelka's translates as "Little Arrow." Both returned to Earth alive. They were the first living creatures to complete an orbital flight and survive.
Less than four weeks before their launch, Chaika and Lisichka had died when their rocket exploded on the 28th of July 1960. Both had been part of the same Vostok orbital programme.
On the 22nd of December 1960, two dogs named Shutka and Kometa launched toward orbit. The third stage of the rocket malfunctioned. The emergency escape system separated the capsule at around 214 km and sent it back toward Earth on a ballistic path.
A sixty-hour timer on the self-destruct mechanism threatened to destroy the capsule if the recovery team did not reach it in time. The capsule appeared to have landed in Siberia, and a team was dispatched immediately.
Deep snow buried the capsule when the recovery team arrived. There was not enough remaining daylight on the first day to safely disarm the timer and open it. The window had frosted over, and no signs of life were visible. On the second day, the capsule was opened and the dogs inside were heard barking. The team wrapped Shutka and Kometa in sheepskin coats and flew them to Moscow. The mice and other small animals aboard the capsule were found dead from the cold.
Shutka was also known as Damka and Zhemchuzhnaya. Kometa went by the names Krasavka, Zhulka, and Snezhinka. After the rescue, Kometa was adopted by Oleg Gazenko, a leading Soviet scientist working with space animals. She had puppies and lived with Gazenko and his family for fourteen years.
Chernushka, whose name means "Blackie," orbited once on the 9th of March 1961 aboard Korabl-Sputnik-4. Riding alongside her was a cosmonaut dummy that Soviet officials had nicknamed Ivan Ivanovich, along with mice, guinea pigs, and other biological material. The dummy was ejected from the capsule during re-entry and parachuted to a soft landing. Chernushka was safely recovered inside the capsule.
Sixteen days later, on the 25th of March 1961, Zvyozdochka made a single orbit aboard Korabl-Sputnik 5. Zvyozdochka's name, meaning "Starlet," had been chosen by Yuri Gagarin. The flight carried a wooden cosmonaut dummy. Both Zvyozdochka and the dummy were recovered successfully. This was the final practice run before Gagarin's own flight on the 12th of April 1961.
Veterok, meaning "Light Breeze," and Ugolyok, meaning "Ember," launched on the 22nd of February 1966 aboard Kosmos 110. They were recovered on the 16th of March, after twenty-two days in orbit. That duration set a record for the longest spaceflight ever made by dogs, one that was not surpassed until the Soyuz 11 mission in June 1971.
Both Veterok and Ugolyok showed signs of physical deconditioning after their return. They experienced cardiovascular problems, dehydration, weight loss, and a loss of muscle tone and coordination. Their recovery took several weeks, but no lasting damage was found. Just over five years passed before any crew surpassed their endurance record.
Updated
Common questions
What were the Soviet space dogs and why did the Soviet Union use dogs in space missions?
Soviet space dogs were stray animals used by the Soviet space program from 1951 to 1966 in suborbital and orbital flights to determine whether human spaceflight was feasible. Dogs were chosen because scientists believed they could endure long periods of inactivity and the physical stress of spaceflight better than other animals. Female dogs were preferred for their calmer temperament and because the capsule suits were built to work only with female anatomy.
What happened to Laika the Soviet space dog on Sputnik 2?
Laika launched into orbit aboard Sputnik 2 on the 3rd of November 1957 and became the first animal to orbit Earth. She died between five and seven hours into the flight from overheating and stress. The true cause of her death was withheld from the public until October 2002; Soviet officials had previously claimed she survived several days before her oxygen supply ran out.
Which Soviet space dogs were the first to survive orbital flight?
Belka and Strelka were the first living creatures to complete an orbital mission and return alive. They launched on the 19th of August 1960 aboard Korabl-Sputnik 2 and spent a full day in orbit. Their spacecraft also carried a grey rabbit, forty-two mice, two rats, flies, and several plants and fungi, all of which survived.
How were Soviet space dogs selected and trained for their missions?
The Soviet program selected stray dogs from Moscow's streets, reasoning that animals hardened by outdoor life would better endure spaceflight. Training included confinement in small boxes for up to twenty consecutive days, sessions in centrifuges simulating liftoff forces, and time in pressure chambers replicating altitude conditions. For orbital missions, a special jelly food made from breadcrumbs, powdered meat, and beef fat was prepared for the dogs.
What is the longest orbital spaceflight record held by a Soviet space dog?
The longest orbital mission ever flown by dogs was the twenty-two-day flight of Veterok and Ugolyok, launched on the 22nd of February 1966 aboard Kosmos 110 and recovered on the 16th of March. The record was not surpassed until the Soyuz 11 mission in June 1971. Both dogs showed cardiovascular deconditioning, weight loss, and muscle weakness after their return but recovered fully within several weeks.
How did Shutka and Kometa survive their failed Soviet space mission in Siberia?
Shutka and Kometa were launched on the 22nd of December 1960 on a mission intended to reach orbit, but the rocket's third stage malfunctioned and the spacecraft never got there. The capsule came down in Siberia buried in deep snow, and a self-destruct timer added urgency to the recovery effort. The dogs were heard barking when the capsule was opened on the second day and were wrapped in sheepskin coats before being flown to Moscow.
All sources
17 references cited across the entry
- 1A Brief History of Animals in SpaceTara Gray — 2 August 2004
- 4BookLaika's window: the legacy of a Soviet space dogKurt Caswell — Trinity University Press — 2018
- 5BookSoviet space dogsOlesya Turkina — FUEL — 2014
- 6JournalWhat the dogs did: animal agency in the Soviet manned space flight programmeAmy Nelson — 2017
- 7NewsFirst dog in space died within hours, BBC News2002-10-28
- 8The remarkable (and censored) Siberian adventure of stray dog cosmonauts Comet and ShutkaKate Baklitskaya — 1 May 2013
- 9BookAnimals in space: from research rockets to the space shuttleColin Burgess — Springer — 2007
- 10NewsFirst dog in space died within hoursBBC — 28 October 2002
- 11JournalAnimals and man in space. A chronology and annotated bibliography through the year 1960.DE Beischer and AR Fregly — 1962
- 12Laika the dog: These are all the animals that have been launched into spaceAristos Georgiou — 3 November 2019
- 13VostokMark Wade — Encyclopedia Astronautica
- 14The flight of Sputnik-6Sven Grahn
- 15BookChallenge to Apollo: The Soviet Union and the Space Race, 1945–1974Asif A. Siddiqi — NASA — 2000
- 16BookPut do zvezdaJurij Gagarin — Laguna — 2020
- 17BookRussian Space Probes: Scientific Discoveries and Future MissionsBrian Harvey et al. — Springer Science & Business Media — 2011