Cool Multiwavelength Fact
Multiwavelength Astronomy
Objects at Different Wavelengths
| Type of Radiation | Wavelength (nm) | Temperature (K) | Typical Sources |
|---|---|---|---|
| gamma-rays | <0.01 | >108 | no sources; some gamma-rays produced in nuclear reactions |
| X-rays | 0.01-20 | 106-108 | gas in clusters of galaxies; supernova remnants; solar corona |
| UV | 20-400 | 104-106 | supernova remnants; very hot stars |
| Visible | 400-700 | 103-104 | stars |
| Infrared | 103-106 | 10-103 | cool clouds of dust and gas; planets; satellites |
| Radio | >106 | <10 | no objects this cold; emission produced by electrons moving in magnetic fields |
