The space probe was believed to have burned up in the Earth's atmosphere in March or April 1960, but it might have survived in orbit until 1962 or later.
Another possibility was that it might have survived in orbit until 1962 or later. The space probe was believed to have burned up in the Earth's atmosphere in March or April 1960.
The space probe was believed to have burned up in the Earth's atmosphere in March or April 1960. Another possibility was that it might have survived in orbit until 1962 or later.
The space probe was believed to have burned up in the Earth's atmosphere in March or April 1960. Another possibility was that it might have survived in orbit until 1962 or later.