NASA’s $4 billion Nancy Grace Roman Space Telescope is set to launch this Sunday, according to a Times of India report, beginning a mission designed to survey more than 2 billion galaxies and investigate the nature of dark energy and dark matter.
The observatory, named after NASA’s first chief astronomer, will conduct expansive wide-field surveys from its orbit around the Sun-Earth Lagrange point L2. Its primary instrument, the Wide Field Instrument, offers a field of view 100 times larger than Hubble’s infrared camera while maintaining similar resolution, enabling large-scale mapping of cosmic structure.
The mission’s core science objectives include measuring the expansion history of the universe and the growth of large-scale structure to constrain dark energy models, conducting a microlensing survey to detect exoplanets — including free-floating planets — and performing a coronagraph technology demonstration for direct imaging of exoplanets.
Roman will operate alongside the Hubble Space Telescope and the James Webb Space Telescope, with its wide-field capability complementing the deeper, narrower observations of the two existing observatories. NASA has described the trio as providing “a comprehensive view of the universe across spatial scales and wavelengths.”
Analysis: The Roman telescope represents a shift toward survey-driven astrophysics, prioritizing statistical power over targeted observations. Its wide-field design allows it to address questions — such as the distribution of dark matter across cosmic time and the demographics of exoplanets at wide orbital separations — that require large, uniform datasets. The mission’s success depends on achieving its planned five-year primary mission and managing the data volume, expected to exceed 20 petabytes.
Sources:
– Times of India, “NASA’s $4 billion Roman telescope to map 2 billion galaxies and uncover secrets of the universe,” https://timesofindia.indiatimes.com/science/nasas-4-billion-roman-telescope-to-map-2-billion-galaxies-and-uncover-secrets-of-the-universe/articleshow/133517989.cms
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Story synopsis gathered from: Times of India – Top Stories — source
