NASA’s Roman Space Telescope set to launch, promising ten groundbreaking cosmic discoveries

After over ten years of work, NASA’s Nancy Grace Roman Space Telescope is scheduled to lift off this weekend, featuring a field of view roughly one hundred times that of the Hubble Space Telescope. The observatory aims to address the persistent Hubble-constant discrepancy by measuring galaxy recession speeds with unprecedented precision. It will also test whether dark energy is evolving, examine the universe’s sigma-eight clumpiness, and dramatically enlarge the known population of transiting exoplanets, potentially adding up to 100,000 new worlds.

Through microlensing, Roman expects to reveal about a thousand otherwise hidden exoplanets and detect wandering black holes, neutron stars, or rogue planets. Its wide-field view will aid rapid identification of kilonova afterglows for multimessenger astronomy, produce the most detailed dark-matter map of the Milky Way’s outskirts, and advance asteroseismology by capturing starquakes across millions of stars. Julie McEnery, the mission’s senior project scientist, says the greatest breakthroughs will likely be surprises the telescope was not designed to seek.