Radio telescope

Part of spectrum viewed:

Location:

Sources of radiation:

• Many radio waves in space come from cold clouds of hydrogen gas.

• Most stars do not give off many radio waves.

Image: A composite image of the Whirlpool Galaxy, using radio and visible light wavelengths. The white is how the galaxies appear to optical telescopes – one giant spiral galaxy with a smaller one hanging off an arm. The Very Large Array  radio telescope array sees a much bigger picture. © B. Saxton (NRAO/AUI/NSF) with data provided by J. Hibbard, CC BY 3.0.