From 10 to 22 years: The Nancy Grace Roman Space Telescope's Mission Has Just Been Extended.

The Nancy Grace Roman Space Telescope has been extended in its mission duration, now potentially reaching 22 years of science operations. NASA announced that the telescope has sufficient fuel to achieve this extension. The mission initially planned for five years of observations followed by a five-year extended mission, but the total length could now be 22 years. The extension was due to several factors, including precise launch, accurate spacecraft mass tracking, and efficient mid-course corrections. Fuel is the limiting factor for mission length, and the Roman's extra fuel could allow four more years of observations. The telescope's mass changed during development, allowing for more fuel to be loaded, and the first mid-course correction was extremely accurate, requiring less fuel than planned. The second correction will also require less fuel due to the first's precision. The Roman will enter a halo orbit around L2 in early December, requiring less fuel. This extension adds up to an extra ~12 years of observations. The core community surveys will be dedicated to the Core Community Surveys, including the High-Latitude Time-Domain Survey, while the extended mission will be dominated by the General Observer (GO) program, offering the telescope's capabilities to the wider community. The GO program has about 50 candidate programs ready. The Roman also has a coronagraph instrument serving as a technology demonstrator for a future planet-finding mission. The telescope was initially named WFIRST but was re-named in honor of Nancy Grace, NASA's first chief of astronomy. It was initially designed for a 1.5-meter mirror but ended up with a 2.4-meter mirror. The spacecraft is approaching actual operations and will undergo commissioning and testing once it reaches L2. The results will begin to arrive soon.

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