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Wide-field Infrared Survey Explorer (WISE)

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Wide-field Infrared Survey Explorer (WISE)
NameWide-field Infrared Survey Explorer
Mission typeAstronomical survey
OperatorNASA / Jet Propulsion Laboratory
Launch date2009-12-14
Launch siteCape Canaveral Air Force Station
Spacecraft typeSpace telescope
InstrumentInfrared array camera
Mass661 kg

Wide-field Infrared Survey Explorer (WISE) is a NASA-funded space telescope mission built to perform a sensitive all-sky survey at mid-infrared wavelengths. The mission, developed and managed by Jet Propulsion Laboratory, combined cryogenic detector technology with a wide-field telescope to map the sky, enabling discoveries across astronomy, planetary science, astrophysics, and cosmology. WISE's datasets have been used by researchers at institutions such as California Institute of Technology, Harvard–Smithsonian Center for Astrophysics, and University of Arizona.

Overview

WISE was conceived to extend sky surveys pioneered by missions like Infrared Astronomical Satellite (IRAS) and Cosmic Background Explorer (COBE), operating in wavelength bands optimized for detecting cool objects and dusty systems. The project team included contractors from Ball Aerospace, instrumentation groups from University of California, Los Angeles and University of Minnesota, and science leads from NASA Ames Research Center and Jet Propulsion Laboratory. Launched aboard a Delta II rocket from Cape Canaveral Air Force Station, WISE conducted a polar, Sun-synchronous survey that produced uniform infrared coverage comparable in legacy to Two Micron All-Sky Survey (2MASS) and Sloan Digital Sky Survey (SDSS).

Design and Instrumentation

The spacecraft carried a 40 cm telescope feeding four infrared detector arrays cooled by a solid hydrogen cryostat engineered by teams including Ball Aerospace and contractors with heritage from Spitzer Space Telescope. The focal plane comprised arrays sensitive to bands centered near 3.4, 4.6, 12, and 22 micrometres, leveraging detector technologies advanced at NASA Jet Propulsion Laboratory laboratories. Onboard systems integrated attitude control derived from designs used on WISE predecessor missions and communications hardware compatible with the Deep Space Network and Ames Research Center ground facilities. Thermal control, radiation shielding, and deployment mechanisms reflected engineering lessons from Hubble Space Telescope servicing studies and instrument teams with experience from Chandra X-ray Observatory and Kepler.

Mission Timeline and Operations

After launch on 14 December 2009 from Cape Canaveral Air Force Station aboard a Delta II vehicle, WISE began survey operations in early 2010, completing a full-sky pass within six months and a second pass before cryogen depletion. The cryogenic phase ended when the solid hydrogen coolant was exhausted in late 2010, after which two shorter-wavelength bands continued in a post-cryogenic mission phase. Operations were coordinated with flight projects at Jet Propulsion Laboratory and science operations centers at IPAC (Infrared Processing and Analysis Center) at California Institute of Technology. Routine scanning, data downlink, and calibration programs followed schedules interfacing with NASA mission planning and Ames Research Center operations.

Scientific Results and Discoveries

WISE produced transformative discoveries spanning many fields. Catalogs revealed numerous brown dwarfs including cold Y-class objects that revised the census of the solar neighbourhood, echoing earlier searches such as those using 2MASS and UKIRT. The survey detected obscured active galactic nuclei comparable to objects studied by Sloan Digital Sky Survey and ROSAT, and identified infrared signatures of ultraluminous infrared galaxies similar to sources from IRAS and Spitzer Space Telescope studies. WISE enabled the discovery and characterization of near-Earth objects and comets alongside programs of the Minor Planet Center and collaborations with observatories like Pan-STARRS and Catalina Sky Survey. Cross-matched catalogs with data from GALEX, Hubble Space Telescope, Chandra X-ray Observatory, and Fermi Gamma-ray Space Telescope amplified multiwavelength science on star formation regions such as Orion Nebula and Taurus Molecular Cloud.

Data Processing and Archives

Raw data were processed by teams at IPAC and archived in public releases that became foundational resources cited across the literature. Data products included single-exposure images, coadds, source catalogs, and value-added products enabling cross-surveys with SDSS, 2MASS, Gaia, and archival holdings at Mikulski Archive for Space Telescopes. The mission delivered community tools for source extraction, photometric calibration, and band-merging, adopted by research groups at Harvard–Smithsonian Center for Astrophysics, University of California, Berkeley, and international partners in United Kingdom, Germany, and Japan.

Extended Missions and Follow-ups

Following the primary survey, WISE was reactivated in 2013 as NEOWISE to focus on near-Earth object detection in cooperation with NASA Planetary Defense Coordination Office and the Minor Planet Center. NEOWISE extended monitoring of asteroid populations, complementing ground-based facilities such as Arecibo Observatory (radar), Goldstone Deep Space Communications Complex, Pan-STARRS, and Large Binocular Telescope. Subsequent analyses cross-referenced WISE/NEOWISE data with missions like Spitzer, Herschel Space Observatory, and ground observatories including Subaru Telescope and Very Large Telescope to refine sizes, albedos, and thermal properties of small bodies and trans-Neptunian objects cataloged by surveys including OSSOS and DES.

Legacy and Impact on Astronomy

WISE's all-sky infrared dataset reshaped target selection for missions such as James Webb Space Telescope, Euclid, and Nancy Grace Roman Space Telescope, and fueled citizen-science projects in collaboration with Zooniverse. The mission influenced instrument design for successors, informed infrared detector development at facilities like NASA Goddard Space Flight Center, and anchored archival research at IPAC and partner institutions. WISE's catalogs remain integral to studies of the local stellar neighborhood, galaxy evolution, and solar system small bodies, establishing a legacy comparable to IRAS, 2MASS, and SDSS in multiwavelength astronomy.

Category:Space telescopes Category:NASA missions Category:Infrared telescopes