EditorialThe Imaging X-ray Polarimetry Explorer spacecraft arrives at the Cape Canaveral Space Force Station in Florida on Nov. 5, 2021, to be mounted on a SpaceX Falcon 9 rocket for launch on Dec. 16, 2021. (Isaac Walton/NASA via The New York Times)
EditorialThe Imaging X-ray Polarimetry Explorer spacecraft arrives at the Cape Canaveral Space Force Station in Florida on Nov. 5, 2021, to be mounted on a SpaceX Falcon 9 rocket for launch on Dec. 16, 2021. (Isaac Walton/NASA via The New York Times)