Elon Musk jokes SpaceX rocket a ‘nuclear’ UFO from North Korea
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SpaceX founder Elon MuskElon Reeve MuskFriend, foe or unknown force flying overhead? Congress should find out Did Bezos just save NASA's Project Artemis moon mission? Hillicon Valley: Instagram cracks down on anti-vaccine tags | Facebook co-founder on fallout from call to break up company | House Dems reintroduce election security bill | Lawmakers offer bill requiring cyber, IT training for House MORE joked on Friday that his company's Falcon 9 rocket, launched in Southern California, was actually a "Nuclear alien UFO from North Korea."

The launch from Vandenberg Air Force Base on Friday immediately drew speculation on social media, with some users suggesting that it was an alien spacecraft. 

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Musk appeared content to indulge that speculation. When one Twitter user mentioned Friday night that the rocket launch sparked an "alien debate" among his family members, Musk weighed in on the dispute, tweeting, "It was definitely aliens."

The Falcon 9 rocket was carrying 10 satellites to low-Earth orbit, according to the Los Angeles Times. All of the satellites were successfully deployed.

The launched rocket seen in the skies above California on Friday night drew plenty of interested observers: