Ultraviolet observations of interstellar molecules are currently being obtained primarily with two astronomical satellites, Copernicus (OAO-3) and International Ultraviolet Explorer (IUE). The former covers the wavelength range down to 900 Å with 0.05 or 0.2 Å resolution. IUE can observe fainter or more highly reddened stars than Copernicus, with 0.1 Å resolution, but its wavelength range does not include the resonance absorptions of the important interstellar molecules H2, HD, and N2.