Armstrong and Aldrin were the first men to visit the moon in 1969, exactly 50 years ago and one day. A third astronaut, Michael Collins, stayed in the control module and picked up his colleagues later. Mr. Armstrong passed away in 2012 at the age of 82 and Mr. Aldrin made a heartbreaking statement.
He said he was disappointed that he could not celebrate the 50th anniversary of the moon landing together in 2019.
In an official statement, he wrote, "I am deeply saddened by the passing away of my good friend and space exploration mate, Neil Armstrong, today."
He added, "I really hoped that on July 20, 2019, Neil, Mike and I would commemorate the 50th anniversary of our landing on the Moon. We had also planned the continued expansion of humanity in space. to make possible.
"Unfortunately, this is not the case. Neil will certainly be there with us in spirit. "
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He added on Twitter: "I know that millions of other people join in mourning the passing of Neil – a true American hero and the best driver I know."
Messrs. Armstrong, Aldrin and Collins had only a frantic six months to get to know each other before their mission and apparently "felt the weight of the world," Collins admitted later.
Mr. Collins is the least known of the three and, on previous anniversaries, he was content to be forgotten.
However, with the "huge gap" left by Mr. Armstrong's death, Mr. Collins stated that he felt obligated to speak, even though "my first fondness for the 50th anniversary celebration is to hide under a rock somewhere ".
His two daughters helped the avalanche of 88-year-old requests.
The extraordinary Apollo 11 mission, 50 years ago, was the culmination of decades of work by hundreds of thousands of people in the fields of science, technology, and engineering.
It costs about $ 25 billion, which is worth £ 20 billion or £ 323 billion.
They achieved incredible achievement using technology developed well before modern computers.
In fact, it has been calculated that an i-Phone has about 100,000 times the processing power of the computers used in the 1969 moon landings.
When they finally reached the moon, the famous words of Mr. Armstrong appropriately marked the decisive moment of the century.
He of course said, "A small step for the man, a big step for the man."