Ultraviolet spectrum of the quasar 3C 273

Ultraviolet spectrum of the quasar 3C 273

R930/0006 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 50.8MB

Downloadable file size: 2.6MB

Price image Pricing

Please login to use the price calculator


Credit: FRED ESPENAK/SCIENCE PHOTO LIBRARY

Caption: Ultraviolet spectrum of the quasar 3C 273 taken in the wavelength between 1200-1400 Angstrom. The red dotted line represents the centre of the spectrum with the wavelengths superimposed. The white spot next to 1200 Angstrom is hydrogen's Lyman-alpha line at its usual wavelength while the spot near 1400 Angstrom represents the same emission as we receive from the quasar. The difference between the two wavelengths is explained as a Doppler effect due to the expansion of the universe. According to Hubble's law of expansion, this shift puts the quasar at 2100 million light years away from the Earth.

Release details: Model release not required. Property release not required.

Keywords: 3c 273, astronomy, cosmology, doppler effect, expansion, hubble's law, iue imagery, quasar, quasar controversy, red shift, science, spectral lines, universe

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.