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NASA Details Ambitious Habitable Worlds Observatory Mission
Confirmed
In Short: NASA's Habitable Worlds Observatory (HWO), pronounced 'who' and referred to as Hab Worlds, is the space agency's first mission dedicated to searching for signs of life on planets beyond our solar system.
From a gravitationally stable orbit 1.5 million kilometers from Earth, the observatory will collect data on exoplanets for several hours at a time, gathering thousands of photons reflected by gases in their atmospheres.
To observe Earth-like worlds against the glare of their host stars, HWO requires a coronagraph that can suppress starlight by a factor of 10 billion, a significant technological leap from current capabilities.
Mission planners also aim to include robotic servicing capabilities for the telescope, a far cry from the basic servicing possible in geostationary orbits 35,000 kilometers above Earth.
Astronomers identified HWO as their top-priority large mission in the 2020 Decadal Survey on Astronomy and Astrophysics, with an estimated budget of $11 billion.
Alison Nordt, director for space science and instrumentation at Lockheed Martin, emphasized the importance of learning from the James Webb Space Telescope's development, stating, 'Don’t start a program and expect miracles to happen.'
The observatory's High Resolution Imager (HRI) will serve as the main imaging camera, providing grism spectroscopy and sub-microarcsecond astrometry, as well as fine guidance, wavefront sensing, and pupil imaging.
NASA awarded BAE Systems, Lockheed Martin, and Northrop Grumman contracts worth a combined $17.5 million to advance key stabilizing technologies.
The goal is for HWO to directly image at least 25 Earth-like exoplanets, with a primary mission featuring a 6- to 8-meter mirror, larger than the James Webb Space Telescope's 6.5-meter mirror.
NASA is considering building the telescope with a 6- to 8-meter mirror, as larger telescopes can capture finer details.
The Nancy Grace Roman Space Telescope, set to launch in the near future, will revolutionize our understanding of dark matter and dark energy while discovering some 100,000 exoplanets.
Evgenya Shkolnik, a professor of astrophysics at Arizona State University, noted, 'This is our first chance to directly search for life because we live in a time where technologically we think we know how.'
The mission represents an enormous technological leap forward, prompting NASA to reimagine its approach for developing flagship missions.
What this adds
The observatory's primary mission will feature a 300-megapixel infrared camera with a field of view 100 times larger than the Hubble Space Telescope’s, collecting data 1,000 times faster.
NASA engineers are reimagining what is possible for future space telescopes with the emergence of Starship, New Glenn, and SLS rockets.
The mission aims to capture pictures of Earth-like planets, marking a significant step toward directly imaging potentially habitable worlds.
What's confirmed
- From a gravitationally stable orbit 1.5 million kilometers from Earth, the observatory will collect data on exoplanets for several hours at a time, gathering thousands of photons reflected by gases in their atmospheres.
- To observe Earth-like worlds against the glare of their host stars, HWO requires a coronagraph that can suppress starlight by a factor of 10 billion, a significant technological leap from current capabilities.
- Mission planners also aim to include robotic servicing capabilities for the telescope, a far cry from the basic servicing possible in geostationary orbits 35,000 kilometers above Earth.
- Astronomers identified HWO as their top-priority large mission in the 2020 Decadal Survey on Astronomy and Astrophysics, with an estimated budget of $11 billion.
- The observatory's High Resolution Imager (HRI) will serve as the main imaging camera, providing grism spectroscopy and sub-microarcsecond astrometry, as well as fine guidance, wavefront sensing, and pupil imaging.
- NASA awarded BAE Systems, Lockheed Martin, and Northrop Grumman contracts worth a combined $17.5 million to advance key stabilizing technologies.
- The goal is for HWO to directly image at least 25 Earth-like exoplanets, with a primary mission featuring a 6- to 8-meter mirror, larger than the James Webb Space Telescope's 6.5-meter mirror.
- NASA is considering building the telescope with a 6- to 8-meter mirror, as larger telescopes can capture finer details.
- The Nancy Grace Roman Space Telescope, set to launch in the near future, will revolutionize our understanding of dark matter and dark energy while discovering some 100,000 exoplanets.
- The mission represents an enormous technological leap forward, prompting NASA to reimagine its approach for developing flagship missions.
What's still developing
- HWO (pronounced “who” and called Hab Worlds for short) is NASA’s first-ever mission dedicated to searching for signs of life on planets beyond the solar system.
- “A lot of it is making sure that the technology is ready to go, so before you actually start sprinting with a mission, you’ve actually assured that you can do the mission,” Nicola Fox, head of NASA’s Science Mission Directorate, told reporters at an April press event.
- We present a design concept for HRI, developed during concurrent design sessions by flowing down science requirements within the envelope of NASA’s EAC-1 telescope architecture.
- “James Webb had 10 new inventions, primarily with its lightweight mirror, that were brought to bear to enable it to be launched,” Charlie Atkinson, JWST chief engineer at Northrop Grumman, told Payload.
- “If you are too heavy to fit into a rocket, you have to reduce mass, which affects many aspects of system design, performance, and cost,” Laura Coyle, BAE Systems principal optical engineer in charge of HWO tech, told Payload.
- NASA is billing HWO as the first telescope “designed specifically to search for signs of life on planets orbiting other stars.” By signs of life, the agency is referring to key chemical fingerprints like oxygen, water, carbon dioxide, and methane, which could indicate a potentially habitable world.
- Lee Feinberg, a NASA HWO lead and principal architect, told Payload he and his team are in communication with representatives from all three super heavy-lift launchers, having recently visited SpaceX to track Starship’s progress.
- “We are really rooting for big launchers. That is really, really important for us,” he said.
- Finding an Earth-like world beyond the solar system is the Holy Grail of exoplanet research, and the field has experienced incredible technological advancements in searching for and identifying exoplanets since the first exoplanet was discovered in 1995.
- Capturing pictures of these previously hidden, Jupiter-like planets, he said, marks a first step toward directly imaging potentially habitable Earth-like planets.
- The observatory’s primary mission features the Wide Field Instrument, a 300-megapixel infrared camera with a field of view 100 times larger than the Hubble Space Telescope’s, collecting data 1,000 times faster.
- “No other space observatory has this capability.” Savransky plans to attend the telescope’s launch from Kennedy Space Center aboard a SpaceX Falcon Heavy rocket, along with three doctoral students who have supported the work: Isabela Huckabee, Saanika Choudhary and Rifah Tasnim.