Russian space agency Roscosmos confirmed his death in a statement on its website, but gave no further details. "Putin always admired Leonov's courage".
He was then chosen to be the first cosmonaut to land on the moon, but the catastrophic explosion of the Soviet N-1 moon rocket in 1969 abruptly ended Russia's moon aspirations. -Soviet space flight. It occurred at a time when Russian Federation and the United States, which spent part of the Cold War locked in a space race, were pursuing a policy of detente.
They wore placards on their spacesuit backpacks, one saying "Leonov No. 1" and the other "Happy Birthday, Alexey Arkhipovich". "His venture into the vacuum of space began the history of extravehicular activity that makes today's Space Station maintenance possible", NASA tweeted.
Despite the mishap, Leonov remained a cosmonaut of high regard and he was decorated as a "Hero of the Soviet Union". On the fourth spacewalk of this series planned for later this month, Koch and Meir will perform the world's first all-female spacewalk. The cosmonaut who made history by exiting his capsule for 12 minutes nearly 54 years ago will be laid to rest next Tuesday at a federal military cemetery. Israelian, a close friend of Leonov, says that Leonov's experience on the Soyuz-Apollo mission shaped his life.
Their return to Earth almost ended in tragedy when Leonov and Belyayev were forced to crash land in a forest some 180 kilometres (111 miles) from the Urals city of Perm.
Alexei Leonov was known as Cosmonaut No 11.
Leonov is survived by his wife Svetlana Leonova, two daughters and two grandchildren.
He also helped United States astronaut Tom Stafford adopt two Russian boys.
Roscosmos said Leonov would be buried Tuesday at a military memorial cemetery outside Moscow.