Cosmic clouds called nebulae and distant galaxies also appear as fuzzy, dim spots, in a telescope. In my 40-plus years of observing the sky, I had never accidentally bumped into a comet.

The fuzzy glow of M87’s black hole is masking infinite sharp rings of light Event Horizon Telescope Collaboration et al. THE picture was seen by billions: a hazy ring, glowing orange-bright ...

In my region, in Wayne County, Pa., the light pollution is not terrible, not in comparison to living much closer to or inside a city. Nevertheless, what a difference it made to see the sky nearly ...