Buzz Aldrin SKIPS moon mission 50th anniversary reunion to take photos for a ...

Buzz Aldrin caused consternation on Tuesday by failing to turn up to a reunion with crewmate Michael Collins on the anniversary of the Apollo 11 launch.

The 88-year-old bowed out at the last minute because of his intense travel schedule,  NASA spokesman Bob Jacobs said, according to AP. 

Photos of the spaceman emerged on Wednesday, taken in Burbank, California during his tour of the nation to attend celebrations marking the first moon landing in 1969.

They show him posing for private jet company Flexjet, including as he boarded a Challenger 300 plane. Aldrin also tweeted a smiling selfie on the jet with the caption: '50th Anniversary selfie on our official jet provider @flexjet'.

He also posted a video on Twitter Tuesday evening, in which he spoke about the historic space mission. 

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Promotional photos of Buzz Aldrin emerged on Wednesday, taken in Burbank, California, after he bailed on a NASA reunion with his crewmate Michael Collins on Tuesday

Promotional photos of Buzz Aldrin emerged on Wednesday, taken in Burbank, California, after he bailed on a NASA reunion with his crewmate Michael Collins on Tuesday

The flaky spaceman posted a video on Twitter Tuesday evening, saying: 'By my greatest good fortune, I was able to join Neil and Mike on the Saturn V'. He did not mention NOT joining Collins at Tuesday's reunion

The flaky spaceman posted a video on Twitter Tuesday evening, saying: 'By my greatest good fortune, I was able to join Neil and Mike on the Saturn V'. He did not mention NOT joining Collins at Tuesday's reunion

The video was captioned: '50 years ago today, Neil Armstrong, Mike Collins and I launched into space on a mission of enormous importance.' 

'By my greatest good fortune, I was able to join Neil and Mike on the Saturn V that day,' Aldrin said in the video. 

He did not mention the fact that he was not joining crewmate Collins on Tuesday at the John F. Kennedy Space Center, Merritt Island, Florida, the exact site  where their Saturn V rocket set off.

Collins, 88, who who was left alone aboard the Apollo 11 command module while Neil Armstrong and Aldrin walked on the Moon, made mention of Aldrin's conspicuous absence. 

'There's a difference this time. I want to turn and ask Neil a question and maybe tell Buzz Aldrin something, and of course, I'm here by myself,' he said. 

The 88-year-old posed for private jet company Flexjet, including in the cockpit of a Challenger 300

The 88-year-old posed for private jet company Flexjet, including in the cockpit of a Challenger 300

Aldrin is pictured in front of a private plane for what he called 'our official jet provider' Flexjet

Aldrin is pictured in front of a private plane for what he called 'our official jet provider' Flexjet

The 88-year-old former astronaut posted this '50th Anniversary selfie' on Twitter Wednesday

The 88-year-old former astronaut posted this '50th Anniversary selfie' on Twitter Wednesday

Social media users were soon asking after the second man to walk on the Moon, with Katy Moore tweeting: 'Where is Buzz Aldrin today? He was not with Collins at 39A.'

While Maxwell Mark wrote: 'Where was Buzz Aldrin?'   

Aldrin and Collins may reunite in Washington on Friday or Saturday, the 50th anniversary of Apollo 11′s moon landing.   

Aldrin and Collins are the two surviving astronauts who were joined by Armstrong on the July 16, 1969 mission to the moon. 

Four days after the launch, Aldrin and Armstrong became the first people to walk on the moon, while Collins stayed aboard the Apollo 11 tending to Columbia, the mother ship. 

Group portrait of Apollo 11 lunar landing mission astronauts (L-R) Neil Armstrong, Michael Collins and Edwin 'Buzz' Aldrin Jr. taken shorly before their July 16, 1969 mission

Group portrait of Apollo 11 lunar landing mission astronauts (L-R) Neil Armstrong, Michael Collins and Edwin 'Buzz' Aldrin Jr. taken shorly before their July 16, 1969 mission

Michael Collins (R) speaks with NASA's John F. Kennedy Space Center Director Robert Cabana

Collins at Launch Pad 39A at the NASA's John F. Kennedy Space Center

Michael Collins at Launch Pad 39A at the NASA's John F. Kennedy Space Center on Tuesday with the facility's Director Robert Cabana, but without Aldrin, who was supposed to be there 

Aldrin confessed in a recent interview at a 50th anniversary gala at the Ronald Reagan Library outside Los Angeles that the three astronauts felt disconnected from the people back on earth watching the momentous event.

'I sometimes think the three of us missed "the big event,"' he said. 

In other celebrations of the historic day, Vice President Mike Pence paid tribute to Armstrong on Tuesday at the Smithsonian's National Air and Space Museum in Washington.

On July 16 1969, Armstrong, Buzz Aldrin and Michael Collins were blasted off from Earth and into space on a mission like no other, aiming to put mankind on the moon for the first time.

And exactly five decades on Mike Pence hosted the unveiling of the Apollo 11 commander's spacesuit, which is back on display at the museum for the first time in 13 years.

The Apollo 11 Saturn V rocket taking off from the John F. Kennedy Space Center, Merritt Island, Florida on July 16, 1969

The Apollo 11 Saturn V rocket taking off from the John F. Kennedy Space Center, Merritt Island, Florida on July 16, 1969

Rick Armstrong, the son of Neil Armstrong (left), vice president Mike Pence (center), and Smithsonian´s National Air and Space Museum director Ellen Stofan (right), unveil Neil Armstrong´s Apollo 11 spacesuit

Rick Armstrong, the son of Neil Armstrong (left), vice president Mike Pence (center), and Smithsonian´s National Air and Space Museum director Ellen Stofan (right), unveil Neil Armstrong´s Apollo 11 spacesuit

On July 16 1969, Armstrong, Buzz Aldrin and Michael Collins were blasted off from Earth and into space on a mission like no other, aiming to put mankind on the moon for the first time

On July 16 1969, Armstrong, Buzz Aldrin and Michael Collins were blasted off from Earth and into space on a mission like no other, aiming to put mankind on the moon for the first time

In a speech watched by the late astronaut's wife, son, Rick, and grandson, Bryce, Mr Pence praised Armstrong's courage and 'incredible accomplishment' in taking once small step for man, and one giant leap for mankind all those years ago. 

'The risks were great, the odds were long, and they were so long that some even feared that if we could make it to the Moon we might not be able to make it back,' he said.

'I expect it is moving for his family and for every family to remember the dangers and the risks at the time that this spacesuit simply may have been the very last thing that Neil Armstrong ever wore, in fact, there was a time and during that time that scientists speculated whether when a lunar module like this one behind me landed on the Moon, whether it would be able to lift off again.'

In the event of such a tragedy, president at the time, Richard Nixon – who delivered a message to the three astronauts after their successful lunar landing – asked his speechwriter, William Safire, to also write a letter of a different kind.

Titled, 'In Event of a Moon Disaster', the alternative speech was set to

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