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| New Worlds Observer | |
|---|---|
| Name | New Worlds Observer |
| Type | space mission concept |
| Operator | Unfunded concepts |
| Status | proposed |
| Mission duration | proposed |
| Launch mass | proposed |
| Launch date | proposed |
| Orbit | formation flight |
New Worlds Observer is a proposed space-based direct-imaging mission concept intending to detect and characterize extrasolar planets by suppressing starlight with a free-flying occulter. The concept links optical engineering, exoplanet science, and mission design discussions that involve institutions such as NASA, Jet Propulsion Laboratory, Aerospace Corporation, University of Arizona, and industrial partners like Northrop Grumman and Ball Aerospace. It sits within a lineage of mission concepts including Terrestrial Planet Finder, HabEx, LUVOIR, and the James Webb Space Telescope community planning.
The New Worlds Observer concept describes a two-spacecraft system: an external occulter (starshade) and a companion telescope operating in coordinated formation flying to provide high-contrast imaging of faint targets near bright stars. Conceptual studies tie the idea to precursor programs and reviews undertaken by NASA Ames Research Center, the Keck Observatory science community, and panels such as the Decadal Survey (astronomy and astrophysics). Related technologies and heritage include results from Hubble Space Telescope coronagraphy, development work at Goddard Space Flight Center, and optical testing performed at National Optical Astronomy Observatory facilities.
Design studies propose a large, petal-shaped occulter separated by tens of thousands of kilometers from a visible/near-infrared telescope, with stationkeeping and alignment provided by navigation systems used in missions like LISA Pathfinder and formation concepts explored by TerraSAR-X cooperatives. Team roles in concept studies often invoked contributors from Caltech, MIT, Stanford University, Princeton University, and companies with aerospace systems experience such as Boeing and Lockheed Martin. Mission proposals evaluated trade-offs among occulter diameter, telescope aperture (drawing on precedents such as Kepler (spacecraft) and Spitzer Space Telescope), and launch architecture options potentially using vehicles referenced in planning documents like Atlas V and Delta IV Heavy.
Starshade concepts build on diffraction control theory and petal geometry optimization derived from optical work at MIT Lincoln Laboratory, Ball Aerospace, and the Harvard & Smithsonian Center for Astrophysics. Key engineering elements include deployment mechanisms reminiscent of designs tested for James Webb Space Telescope sunshield deployment, precision metrology akin to systems developed for Gaia (spacecraft), and structure-mechanics modeling with inputs from NASA Langley Research Center analysts. Starshade manufacturing and ground test programs reference facilities at Marshall Space Flight Center and materials expertise traceable to Carnegie Institution for Science collaborations.
Proponents argued the New Worlds Observer could image Earth-analog planets in the habitable zones of nearby stars identified by surveys such as Hipparcos, Gaia (spacecraft), and Kepler (spacecraft), and follow up targets from TESS and ground-based programs at Keck Observatory and European Southern Observatory. Spectroscopic characterization goals invoked instruments with heritage from spectrometers used on Hubble Space Telescope and designs studied for LUVOIR and HabEx, aiming to detect biosignature gases similar to the search strategies discussed in reports by the SETI Institute and the Exoplanet Exploration Program. Science cases referenced catalogs assembled by California Institute of Technology and observational priorities listed in the Astrophysics Decadal Survey.
Initial advocacy for starshade-enabled missions occurred in the early 2000s among teams at NASA Ames Research Center, JPL, University of Colorado Boulder, and the Space Telescope Science Institute. The concept appeared in mission studies alongside Terrestrial Planet Finder and informed later mission concept maturity assessments by panels from National Research Council (US). Various funded technology demonstrators and design studies were proposed to agencies including NASA Science Mission Directorate and collaborations with industry partners such as Northrop Grumman. Proposals interacted with programmatic decisions influenced by budget cycles in Congress of the United States and strategic planning within NASA Headquarters.
The scientific objectives prioritized by advocates include detection of Earth-sized planets around nearby FGKM stars, measurement of planetary albedos and radii through reflected-light photometry, and retrieval of atmospheric composition via low- to moderate-resolution spectroscopy to seek features such as oxygen, water vapor, and methane discussed in literature from Caltech, University of Arizona, and the University of California, Berkeley. The programmatic science rationale ties into broader questions earlier framed by committees from the National Academy of Sciences and recommendations made in the Decadal Survey (astronomy and astrophysics) and complements ground-based exoplanet characterization efforts at facilities like Subaru Telescope and Very Large Telescope.
Critiques of the New Worlds Observer concept focused on engineering risks in deploying and flying a kilometer-scale occulter at tens of thousands of kilometers separation, budgetary constraints highlighted in analyses by Congressional Budget Office-style reviewers, and competitive prioritization against flagship concepts such as LUVOIR and HabEx. Additional concerns addressed target acquisition and slew logistics comparable to challenges discussed in operations planning for Hubble Space Telescope servicing debates, potential performance sensitivities revealed by diffraction modeling from MIT and Caltech teams, and the need for precursor technology demonstration missions akin to programs like SMEX and Explorer program missions. Ongoing discussions in the community—including those at conferences organized by American Astronomical Society and workshops led by NASA Jet Propulsion Laboratory—continue to weigh the trade-offs of starshade approaches versus internal coronagraphs.
Category:Proposed space telescopes