Swarms of satellites launched by SpaceX and other companies are disrupting astronomical observations. Here's how scientists ...

Webster, this spectrum is “the entire range of wavelengths or frequencies of electromagnetic radiation extending from gamma ...

its jet was so far measured only from radio wavelengths to X-ray energies. “At the most energetic end of the electromagnetic spectrum Centaurus A could only be observed as an unresolved point source”, ...

Radars send out electromagnetic waves similar to wireless computer networks ... it may reflect off the sea and return strong reflectivity that is really just sea "clutter". At some wavelengths the ...