Physics 8m 30s Roman Space Telescope’s First Test Image: Why Green Rings Mean It Works The Roman Space Telescope switched on its 300-megapixel camera and returned a field of green doughnuts. Here is why defocused stars mean…
News 7m 30s Roman Space Telescope: First Light and What Comes Next The Roman Space Telescope saw its first starlight in mid-September, and the stars looked like donuts. That sounds like a malfunction. It…