NASA’s Nancy Grace Roman Telescope Now Stands Complete and Ready for September Launch

Years of painstaking effort at NASA’s Goddard Space Flight Center have finally paid off, with the Nancy Grace Roman Space Telescope now fully completed. Last November, the engineers were able to connect the two main portions, and now that the observatory has been polished and tested, it is sitting pretty in the site’s largest clean room. Next up is shipping out to Florida’s Kennedy Space Center in June, where a SpaceX Falcon Heavy rocket will launch into space as early as September, an incredible 8 months ahead of schedule and under budget.

Nancy Grace Roman earned the nickname ‘Mother of Hubble’ for effectively directing the agency’s astronomy program during the 1960s and 1970s. The new telescope is a suitable tribute to her name, with the same 2.4-meter mirror as Hubble, but everything else has been dramatically increased up. The observatory’s Wide Field Instrument is a 300-megapixel camera made up of 18 custom-built detectors that work together. Each of these detectors is essentially made up of pixels that are tuned in to pick up both visible light and near-infrared wavelengths, allowing scientists to choose the level of detail they require by using a filter wheel to dial in the exact colors they want.

The new camera on the Roman Telescope has a field of vision that is approximately 100 times larger than what Hubble could capture in a single picture. Because of the greater space available, a single exposure on the Roman Telescope may cover an area two hundred times larger than Hubble could. Where Hubble took decades to map a small piece of the sky, Roman will be able to cover vast areas in a matter of days. The reason it’s feasible is due to design decisions taken by NASA years ago, when they elected to employ a handful of surplus mirrors from the National Reconnaissance Office that had come their way, giving them the room they needed for a larger instrument package without having to start again.

The data flow will also be significant, with each day’s operations returning approximately 1.4 terabytes of data. And during the duration of its five-year primary mission, that will amount to thousands of gigabytes, all of which will be available for astronomers to explore and analyze. They’ll be able to see over a billion galaxies, get a close-up look at the Milky Way, and begin searching for tens of thousands of exoplanets. Some of those planets will be rogue objects that were flung out of their parent stars a long time ago, while others will appear as a result of gravitational microlensing, which occurs when the light from a distant star suddenly brightens because a planet passes in front of it. But the secret is that the Roman Telescope’s infrared vision can see through dust clouds that would typically obscure all of these objects from Earth’s perspective.

Dark energy and dark matter are at the very top of the scientific agenda. We still don’t know what these two unseen components are, despite the fact that they account for an astounding 95% of the cosmos. Roman will determine how much the expansion of space has altered over billions of years by analyzing the distribution of galaxies and harnessing weak echoes of sound waves that bounced about in the early universe. It will also be able to observe how dark matter gathers together and shapes the entire galaxy through its web of visible matter. At the same time, another equipment, a coronograph, will allow planets orbiting close stars to be observed in a previously unheard-of way, similar to how stars are blocked out by a shield. That object also functions as a trial ground for future expeditions that aim to take pictures of planets similar to Earth.

When the Falcon Heavy launches from Launch Pad 39A in September, the Roman Telescope will follow in the footsteps of numerous previous science missions. What’s interesting is that this cargo is bringing a much larger perspective than we’ve previously seen. In a single year, it will collect more data on the sky than Hubble did in almost thirty years in space. Astronomers from around the world have already submitted suggestions for the first batch of observations. The telescope will spend its time scanning, measuring, and recording what it discovers before beaming it back home, allowing researchers to begin piecing together previously unknown areas of the universe.
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