Telescopes of various sorts:
What do we learn by looking at different wavelengths?
radio continuum 73 cm hot, ionized gas electrons in strong magnetic fields radio HI line 21 cm cool to warm clouds of neutral hydrogen gas mm CO line 2.6 mm cold, dense clouds of carbon monoxide composed mostly of molecular hydrogen far infrared 12-100 microns dust warmed by nearby (hot, young) stars near infrared 1-10 microns cool stars optical 500 nm stars, diffuse gas excited by hot stars X-ray 1-10 nm very hot gas: shocks and accretion disks gamma-ray 0.001 nm pulsars, relativistic particles colliding with gas or photons
The Milky Way, at various wavelengths:
A few selected galaxies, at a range of wavelengths.
Resources for further study:
Copyright © Michael Richmond. This work is licensed under a Creative Commons License.