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The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) is the largest project in the history of the Hubble Space Telescope, with 902 assigned orbits (about 60 continuous days) of observing time. It was carried out between 2010 and 2013 with two cameras on board Hubble – WFC3 and ACS – and aims to explore galactic evolution in the early Universe, and the very first seeds of cosmic structure at less than one billion years after the
CANDELS website
by University of California Observatories {{Portal bar, Astronomy, Stars, Spaceflight, Outer space, Solar System Astronomical surveys Observational astronomy
The Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) is the largest project in the history of the Hubble Space Telescope, with 902 assigned orbits (about 60 continuous days) of observing time. It was carried out between 2010 and 2013 with two cameras on board Hubble – WFC3 and ACS – and aims to explore galactic evolution in the early Universe, and the very first seeds of cosmic structure at less than one billion years after the Big Bang
The Big Bang event is a physical theory that describes how the universe expanded from an initial state of high density and temperature. Various cosmological models of the Big Bang explain the evolution of the observable universe from the ...
.
Science goals
CANDELS is designed to document the first third of galactic evolution – on theredshift
In physics, a redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation (such as light). The opposite change, a decrease in wavelength and simultaneous increase in f ...
s from – via deep imaging of more than 250,000 galaxies. Another goal is to find the first Type Ia supernova
A supernova is a powerful and luminous explosion of a star. It has the plural form supernovae or supernovas, and is abbreviated SN or SNe. This transient astronomical event occurs during the last evolutionary stages of a massive star or when ...
beyond and establish their accuracy as standard candles for cosmology. Additional "daytime" WFC3/ UV/Vis exposures in the GOODS-N field were conducted to take advantage of its continuous viewing zone opportunity.
Facility and instruments
CANDELS' main instrument is the Wide Field Camera 3, a near-infrared camera installed on Hubble in May 2009. WFC3 works in tandem with the visible-light Advanced Camera for Surveys, which together gives unprecedented panchromatic coverage of galaxies from optical wavelengths to the near-infrared.References
External links
CANDELS website
by University of California Observatories {{Portal bar, Astronomy, Stars, Spaceflight, Outer space, Solar System Astronomical surveys Observational astronomy