NASA’s Nancy Grace Roman Space Telescope could launch as soon as this weekend, carrying a coronagraph built to study dark matter, dark energy and the structure of the universe itself, while also speeding up the search for potentially habitable planets outside our solar system.
Who Gets the Power
NASA Administrator Jared Isaacman said in April that Roman will investigate dark matter, dark energy and the structure of the universe itself, and accelerate the future of discovery of potentially habitable planets outside our solar system. That’s the pitch from the top: a flagship observatory, funded and managed through the space agency, aimed at questions so large they belong to no one and everyone at once.
Roman is NASA’s newest flagship observatory. It will complement the Hubble and James Webb Space telescopes, and NASA says it will seek out previously hidden aspects of the universe to solve some of its biggest lingering mysteries. The language is grand, the machinery even grander. The people who build and run it get the authority to decide what counts as discovery, while everyone else gets to watch from below.
What the Machine Is Built to Do
The telescope’s experimental coronagraph, nicknamed “starglasses,” can block powerful starlight. Its flexible mirrors can react in real time to maintain precision while capturing cosmic images. The coronagraph is designed to let Roman search for faint, Jupiter-size planets and maybe even spot clouds on those worlds. If it works as expected, it could one day be used to seek out distant Earth-like planets that may be able to support life.
The Roman team believes the telescope will be able to deliver the first direct images of distant planets in visible light. Until now, most extrasolar planets have been detected indirectly, through a star’s wobble or repeated dimming as a planet passes in front of it. Direct snapshots have been limited to a few young planets that were still glowing brightly, mainly in infrared. That’s the promise: not just more data, but a new way of seeing what’s been hidden.
The telescope will also monitor the universe at the very largest scales, mapping the cosmic superstructure of galaxy clusters that stretches out in every direction and showing how it has expanded over time. Those observations might lead scientists to a more refined sense of gravity and may even help them discover new physics. The mission’s broad scientific reach includes distant galaxies, black holes and planets.
Inside the Clean Room, Outside the Public
Roman is named for NASA’s pioneering chief of astronomy who realized the importance of space-based observatories. The telescope will work in tandem with the James Webb Space Telescope, and CNN said the instrument team invited a visitor to step inside the coronagraph virtually by using VR glasses to show how its components fit together. The coronagraph was described as so sensitive to contamination that people entering the clean room had to wear a white “bunny suit,” and no makeup, lotion or scented products could be on their skin.
That’s the ritual of high-tech power: sealed rooms, special clothing, strict rules, and a public kept at arm’s length while the apparatus is prepared to look farther than any ordinary person ever will.
The telescope has a backstory tied to a surprise gift from the National Reconnaissance Office. Its primary mirror was part of a spare mirror that had been intended to point down at the ground for surveillance, but NASA took it and will instead point it at the stars. The New York Times said the mirror’s origin solved a bit of internal politics for NASA’s science program, which had originally conceived a mission like this in the early 2000s after the discovery of dark energy. When NASA was finally ready to build the telescope in the early 2010s, astronomers were discovering thousands of new planets around nearby stars, and the new mirror allowed them to hunt for planets in a whole new way.
What Happens If It Fails
The coronagraph has never been tested outside the lab, and if the mirrors are misaligned or the instrument malfunctions, any planets would be lost in the glare. NASA’s long-running quest to find another living world in the universe would be set back, perhaps by a decade or more. If it succeeds, it will serve as a proof of concept for NASA’s next large telescope, the Habitable Worlds Observatory, which the agency has been developing for more than a decade.
That mission, which won’t lift off until the late 2030s at the earliest, would focus on more than 100 nearby stars and look for planets in closer, warmer orbits that might be more hospitable to life, along with signs of life in their atmospheres. For now, the agency’s newest flagship waits on the edge of launch, a machine built to answer questions about the universe while the people who pay for the system are left with the usual arrangement: watch the experts, trust the apparatus, and hope the glare doesn’t swallow the signal.