do not produce their own light, but they can be seen because they reflect light from luminous objects. The light travels in a straight line directly from the object to your eye. Ray diagrams are ...

It’s been subjected to a lot of geomagnetic activity in recent months, with a potent solar wind producing ... observing objects in gamma rays, X-rays and visible light. Launched in October ...

A cosmic object spotted by the James Webb Space Telescope has flummoxed astronomers. Now, a research team has studied ...