Mr Armstrong and Mr Aldrin were the first men to leave for the Moon in 1969, exactly 50 years and one day. The third astronaut, Michael Collins, stayed in the control module and later took over colleagues. Mr Armstrong died in 2012, aged 82, Mr. Aldrin made a heart statement.
He said that he was disappointed that they would not be able to celebrate the 50th anniversary of the Month of the Moon in 2019.
In his official statement, he wrote: "I was deeply saddened by my good friend and companion of space research, Neil Armstrong today."
He added: "I really hoped that on July 20, 2019 Neil, Mike and I together would commemorate the 50th anniversary of the landing on our moon, as we also expected further expansion of humanity into space that our small mission helped. enable.
"Unfortunately, this is not. Neil will surely be with us in spirit. "
More: NASA Apollo 11 Mystery: How Neil Armstrong confessed "an error"
On Twitter, he added, "I know that millions of others join me in mourning for Neil's passage," says the American Hero and the best pilot I've ever known. "
Mr. Armstrong, Mr. Aldrin and Mr. Collins had only six terrible months to meet before his mission and apparently "feel the weight of the world" over them, later acknowledged by Mr Collins.
Mr. Collins is the least known of the three and on previous anniversaries was the pleasure to forget.
However, Mr Collins, with the "huge gap" left by Mr Armstrong, said he was forced to speak, although "my first inclination to celebrating the 50th anniversary is somewhere hidden below the rock."
His two daughters helped the 88-year-old avalanche of demands.
The Apollo 11 extraordinary mission 50 years ago was the culmination of decades by hundreds of thousands of people in science, technology and engineering.
It costs about $ 25 billion – which is 20 billion pounds or 323 billion pounds in today's money.
They achieved an incredible feat with technology, developed far from modern computers.
In fact, it was calculated that the i-Phone has about 100,000 times the processing power of computers that were used in the landing of the Moon in 1969.
When they eventually reached the moon, Mr Armstrong's famous words appropriately marked the centenary.
Of course he said, "One small step for man, one big jump for humanity."