PX282 - A5 - astrophysical observations
EM-radiation
- historically, just em-radiation from stars were observed
- different wavelengths, , convey different information
- most telescopes are optical or radio as the atmosphere blocks out the other parts of the spectrum
- for UV, IR, etc, space telescopes are used
- earth's atmosphere, primarily , , absorbs large windows of wavelengths
- the wavelengths absorbed by the atmosphere
image: hordell bank, VLA
non-EM-radiation
- gravitational waves
- neutrinos
- direct study