Graphic showing gravitational lensing
Artist impression of GG Tauri-A
VLBA Graphic
Image showing an active M dwarf star, Proxima Centuari, in red with many star spots, ejecting a large stellar flare in yellow and white. Proxima Centauri b, a small Earth-like planet is seen in the distant right of the image.

Electromagnetic Spectrum Limits

I believe that by definition the electromagnetic spectrum runs from 0 to infinite frequency or wavelength.  There are practical…