HabEx

HabEx
Name	HabEx
Country	United States
Operator	NASA
Mission type	Space telescope concept
Status	Study / Decadal proposal

HabEx

HabEx is a proposed space observatory concept studied by NASA to directly image and characterize exoplanets and circumstellar environments. The concept aims to combine advanced starlight suppression techniques and high-precision optical instrumentation to enable spectroscopy of Earth-sized planets around Sun-like stars, complementing other initiatives in exoplanet discovery and characterization. HabEx has been discussed alongside major programs and institutions in the astrophysics community and has influenced technology planning at agencies and laboratories worldwide.

Overview

The HabEx concept was developed within the context of the Astrophysics Decadal Survey process and evaluated by teams affiliated with institutions such as NASA Goddard Space Flight Center, Jet Propulsion Laboratory, Lockheed Martin, Northrop Grumman, and university groups at California Institute of Technology, Massachusetts Institute of Technology, and University of Arizona. Its science drivers intersect with findings from missions and surveys including Kepler (spacecraft), TESS, Gaia (spacecraft), James Webb Space Telescope, and ground-based observatories like the W. M. Keck Observatory, Very Large Telescope, and Thirty Meter Telescope planning consortia. The HabEx study explored architectures that would leverage technologies pioneered for projects such as Nancy Grace Roman Space Telescope coronagraphs and technology demonstrations flown on platforms like SmallSat and testbeds developed at Jet Propulsion Laboratory and NASA Ames Research Center.

Science Goals

HabEx targets core objectives long championed by the exoplanet community and endorsed in reports by panels including the NASA Astrophysics Division and the National Academies of Sciences, Engineering, and Medicine. Principal goals include the direct detection and atmospheric spectroscopy of Earth-like planets in the habitable zones of nearby FGK-type stars identified by surveys like Kepler (spacecraft) and TESS, and distance and astrometry support from Gaia (spacecraft). HabEx science would test models developed by researchers associated with institutions such as Stanford University, Harvard–Smithsonian Center for Astrophysics, University of California, Berkeley, and Princeton University concerning biosignature gases like oxygen and methane, photochemical modeling from groups at NASA Jet Propulsion Laboratory and Carnegie Institution for Science, and planetary formation scenarios informed by datasets from Atacama Large Millimeter Array and ALMA. The mission would also investigate circumstellar disks, debris belts, and planet-disk interactions studied by teams at Max Planck Institute for Astronomy and European Southern Observatory.

Mission Design and Architecture

HabEx study options examined single-aperture and hybrid architectures evaluated by aerospace contractors including Northrop Grumman and Lockheed Martin, and involved systems engineering input from NASA Goddard Space Flight Center, NASA Jet Propulsion Laboratory, and university laboratories at University of Colorado Boulder and California Institute of Technology. Architectures considered apertures comparable to flagship telescopes like Hubble Space Telescope and larger monolithic mirrors, as well as formation-flying concepts inspired by mission studies such as New Worlds Observer and by technology demonstrations linked to Starshade research led by teams at Princeton University and Johns Hopkins University. Trade studies addressed launch vehicles available from providers like United Launch Alliance, SpaceX, and their integration pathways studied by aerospace groups at Aerospace Corporation. Orbital choices analyzed included Sun–Earth Lagrange points used by James Webb Space Telescope and halo-orbit operations performed by missions such as SOHO.

Instruments and Technology

Key instrument concepts in the HabEx study included high-contrast coronagraphs building on developments from the WFIRST coronagraph technology and external occulters (starshades) similar to designs pursued by teams at NASA Jet Propulsion Laboratory and Goddard Space Flight Center. Focal-plane instruments proposed involved spectrographs and imagers with heritage from instruments on Hubble Space Telescope and planned instruments for James Webb Space Telescope, developed by consortia from Ball Aerospace, Ballard Space Systems, and university groups at University of Arizona and University of California, Santa Cruz. Detector technologies under consideration included visible and near-infrared arrays advanced by laboratories at Teledyne Technologies and research programs at Lawrence Berkeley National Laboratory and NASA Glenn Research Center. Wavefront control and deformable mirror technologies were informed by programs at Northrop Grumman and laboratory testbeds at Princeton University and Caltech Optical Observatories.

Observatory Operations

Operational concepts drew on mission operations practices from Hubble Space Telescope, James Webb Space Telescope, and the Chandra X-ray Observatory, with science planning modeled after frameworks used by the European Space Agency for missions like PLATO (spacecraft) and by collaborations between teams at Space Telescope Science Institute and science centers at NASA Goddard Space Flight Center. Data processing and archiving approaches referenced pipelines and archives maintained by institutions such as Mikulski Archive for Space Telescopes and the NASA/IPAC Infrared Science Archive, and interaction with the exoplanet community would involve working groups similar to those organized by the Exoplanet Exploration Program and international partners including European Southern Observatory and research networks at University College London.

Program History and Development

The HabEx concept emerged from community deliberations during the 2010s Decadal planning and was formally studied in the lead-up to the 2020 Decadal Survey in Astronomy and Astrophysics with contributions from teams affiliated with NASA, Aerospace Corporation, Ball Aerospace, Lockheed Martin, and numerous academic institutions including California Institute of Technology, Massachusetts Institute of Technology, University of Arizona, and University of California, Berkeley. Its development paralleled parallel studies such as the Large UV/Optical/IR Surveyor (LUVOIR) concept and drew on lessons from technology demonstrations like the WFIRST coronagraph and starshade testbeds conducted at facilities including Jet Propulsion Laboratory and Goddard Space Flight Center. Funding, technology maturation, and programmatic priorities continue to be influenced by advisory reports from the National Academies of Sciences, Engineering, and Medicine and policy decisions involving agencies and international partners such as NASA and European Space Agency.

Category:Proposed NASA space telescopes