"He was great," Musk wrote in Russian on his Twitter in response to a message from Roscosmos about Korolev's birthday.
He was great
- Elon Musk (@elonmusk) January 12, 2021
In July 2020, Musk announced that he spoke with the family of Academician Korolev.
Later, Korolev's grandson, Andrei, told the Zvezda TV channel about Musk's conversation.