A1689-zD1
A1689-zD1 is the most distant and therefore oldest galaxy discovered as of February 2008.[1][2]
Due to its distance, 12.8 billion light-years, and the according considerable redshift, ~7.6[3], the galaxy's faint light reaches us at infrared wavelengths. It could only be observed with Hubble Space Telescope's Near Infrared Camera and Multi-Object Spectrometer and the Spitzer Space Telescope's Infrared Array Camera exploiting the natural phenomenon of gravitational lensing: The galaxy cluster Abell 1689, which lies between Earth and A1689-zD1, at a distance of 2.2 billion light-years from us, functions as a natural "magnifying glass" for the light from the far more distant galaxy which lies directly behind it, at 700 million year after the Big Bang, as seen from Earth.[1]
References
- ^ a b "Astronomers Eye Ultra-Young, Bright Galaxy in Early Universe". nasa.gov. February 12, 2008. Retrieved 2008-02-25.
- ^ "Astronomers Uncover One of the Youngest and Brightest Galaxies in the Early Universe". Space Telescope Science Institute Baltimore, Md. / nasa.gov. February 12, 2008. Retrieved 2008-02-25.
- ^ "heic0805: Hubble finds strong contender for galaxy distance record". ESA/Hubble. February 12, 2008. Retrieved 2008-04-04.
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