Trump gatecrashed a NASA press conference after SpaceX launched a $4.3 billion space telescope

SpaceX's Falcon Heavy is one of the most powerful rockets on the planet. Joel Kowsky/NASA via Getty Images President Donald Trump dialed in to a NASA press conference after the launch of a new space telescope. Trump called NASA chief Jared Isaacman and said the launch looked "beautiful on television." The Nancy Grace Roman telescope, which will study dark matter and energy, launched aboard a SpaceX rocket. Hours after a NASA mission to unravel the secrets of the universe blasted off on…