==Gallery====See also==* Abell catalogue* List of Abell clusters* Gravitational lensing==References====External links==* Galaxy cluster Abell 1689: Biggest 'Zoom Lens' in Space Takes Hubble Deeper into the Universe (HubbleSite)* Galaxy cluster Abell 1689: Astronomers Find One of the Youngest and Brightest Galaxies in the Early Universe (HubbleSite)* Astronomers take a step towards revealing the Universe's biggest mystery, ESA/Hubble Press Release.
* Galaxy cluster Abell 1689: Biggest 'Zoom Lens' in Space Takes Hubble Deeper into the Universe (HubbleSite)* Galaxy cluster Abell 1689: Astronomers Find One of the Youngest and Brightest Galaxies in the Early Universe (HubbleSite)