The National Aeronautics and Space Administration officially commenced baseline scientific survey operations with the Nancy Grace Roman Space Telescope to investigate dark energy and discover distant exoplanetary systems.
Positioned at the Sun-Earth Lagrange Point 2, approximately 1.5 million kilometers from Earth, the observatory features the Wide Field Instrument, which provides an imaging field of view 100 times larger than the Hubble Space Telescope while maintaining comparable high-resolution optical clarity. Roman’s scientific mandate focuses on mapping billions of galaxies across cosmic time to measure the accelerating expansion rate of the universe driven by dark energy. In addition, the mission will utilize gravitational microlensing surveys to identify thousands of exoplanets, including rogue worlds drifting across interstellar space.
The telescope also carries the Coronagraph Instrument, an advanced technology demonstrator designed to block direct glare from parent stars, allowing direct imaging and spectroscopic analysis of gas giant planets in distant solar systems.
Astrophysicists worldwide expressed optimism that Roman’s wide-field infrared observations will revolutionize observational cosmology and provide unprecedented datasets on stellar formation and galactic evolution.
Equipped with a 2.4-meter primary mirror, Roman will survey thousands of square degrees of sky in the near-infrared spectrum, collecting data sets that would require centuries of observation using narrow-field space observatories. NASA collaborates with international science teams, including the European Space Agency and Japan Aerospace Exploration Agency, to facilitate open-access scientific pipelines for global astronomers studying cosmic evolution and stellar physics.
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