HOUSTON, TX — Hundreds of NASA scientists, engineers and aerospace experts watched in awed silence Friday as President Trump explained several basic principles of space to them during a visit to the agency.
Trump, speaking to an audience that included astrophysicists, propulsion engineers and researchers with decades of experience, said space was “very big” and emphasized that getting there remained difficult because “you have to go very high.”
“You look up and it keeps going,” Trump said. “People don’t realize that.”
Several scientists in the front row nodded slowly.
Trump went on to explain that rockets need to be powerful because Earth has gravity, a force he described as “very strong, actually.”
“That’s the problem,” he said. “Gravity wants to keep you here. The rocket wants to go up. So you need a very strong rocket.”
NASA officials confirmed that this was broadly consistent with their understanding.
The president also addressed the moon, which he noted is farther away than it appears from Earth.
“It looks close,” Trump said. “You see it right there. But it’s actually very far.”
A NASA lunar scientist seated nearby briefly looked down at his hands.
Trump then turned his attention to Mars, telling researchers that the planet could become an important destination because “there’s a lot of land there.”
“You could build,” he said. “Nobody’s really developed it.”
At several points, Trump paused as if allowing the scientists time to absorb the information.
No one interrupted.
Following the remarks, NASA Administrator staff thanked the president for his interest in the space program and said the agency looked forward to continuing its work.
Asked afterward whether the presentation had changed his understanding of the universe, one senior astrophysicist stared silently into the distance for several seconds.
“I think,” he said eventually, “we all learned something today.”
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