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Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey
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<h2 id="science-goals">Science goals</h2> <p>CANDELS is designed to document the first third of galactic evolution – on the <a href="/facts/Redshift/Qfl4VjDF">redshifts</a> from 8 to 1.5 – via <a href="/facts/Deep_field/Auz98FQg">deep imaging</a> of more than 250,000 galaxies. Another goal is to find the first <a href="/facts/Type_Ia_supernova/W4rEFuDK">Type Ia</a> <a href="/facts/Supernova/Pfo2J23l">supernova</a> beyond z > 1.5 and establish their accuracy as <a href="/facts/Standard_candle/Xae3hVvK">standard candles</a> for <a href="/facts/Cosmology/yM19zM7Y">cosmology</a>. Additional "daytime" WFC3/<a href="/facts/Ultraviolet%25E2%2580%2593visible_spectroscopy/MUPLLczo">UV/Vis</a> exposures in the <a href="/facts/GOODS/MrJGSusr">GOODS</a>-N field were conducted to take advantage of its continuous viewing zone opportunity.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> </p> <h2 id="facility-and-instruments">Facility and instruments</h2> <p>CANDELS' main instrument is the <a href="/facts/Wide_Field_Camera_3/XPTKFGBx">Wide Field Camera 3</a>, a <a href="/facts/Near-infrared/44XdJNcc">near-infrared</a> camera installed on Hubble in May 2009. WFC3 works in tandem with the visible-light <a href="/facts/Advanced_Camera_for_Surveys/bGSJsjyK">Advanced Camera for Surveys</a>, which together gives unprecedented panchromatic coverage of galaxies from optical wavelengths to the near-infrared.<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> </p> <h2 id="external-links">External links</h2> <ul><li><a href="http://arcoiris.ucolick.org/candels/">CANDELS website</a> by <a href="/facts/University_of_California_Observatories/EjLfHVlp">University of California Observatories</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>"Hyperwall: CANDELS UDF". nasa.gov. 28 January 2019. <a href="https://svs.gsfc.nasa.gov/31020" target="_blank">https://svs.gsfc.nasa.gov/31020</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>"Hubble explores the origins of modern galaxies". Spacetelescope.org. 15 August 2013. <a href="https://www.spacetelescope.org/news/heic1315/" target="_blank">https://www.spacetelescope.org/news/heic1315/</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>"Science Goals". CANDELS. University of California Observatories. <a href="http://arcoiris.ucolick.org/candels/survey/Science_Goals.html" target="_blank">http://arcoiris.ucolick.org/candels/survey/Science_Goals.html</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>"About". CANDELS. University of California Observatories. <a href="http://arcoiris.ucolick.org/candels/survey/Science_Goals.html" target="_blank">http://arcoiris.ucolick.org/candels/survey/Science_Goals.html</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> </ol>