Ultraviolet Astronomy
•Ultraviolet radiation with l < 290 nm is completely absorbed in the ozone layer
of the
atmosphere.
•Ultraviolet astronomy has to be done from satellites.
•Several successful ultraviolet astronomy satellites: IRAS, IUE, EUVE, FUSE
•Ultraviolet
radiation traces hot (tens of thousands of degrees), moderately ionized gas in the universe.
