# Dark energy observational research and surveys > Live situation record from CLSTR: https://clstr.news/situations/dark-energy-observational-research-and-surveys > Updated: 2026-08-18T22:43:11.000Z. Sources: 4. Developments: 2. Astronomical research into dark energy has reached significant milestones through large-scale observational surveys and the development of new space-based technology. The Dark Energy Spectroscopic Instrument (DESI) has completed a five-year observing campaign using the Mayall Telescope, recording spectra for over 47 million galaxies and quasars. While some DESI findings suggest dark energy might change over time, the Dark Energy Survey (DES) concluded a six-year analysis that strongly supports the standard cosmological model, suggesting dark energy acts as a stable cosmological constant. To further investigate these phenomena, NASA is developing the Nancy Grace Roman Space Telescope. Researchers are using data from DESI, which employs 5,000 robotic hands to collect light patterns, to explore whether dark energy is a static force or a more complex phenomenon that has influenced the universe's expansion over time. ## Timeline ### 2026-08-18: Dark energy research advances with new space telescope and DESI data Researchers are using NASA's Nancy Grace Roman Space Telescope and the Dark Energy Spectroscopic Instrument to study dark energy and its role in the accelerating expansion of the universe. 2 sources. https://clstr.news/cluster/dark-energy-research-advances-with-new-space-telescope-and-desi-data ### 2026-08-14: Dark energy surveys complete major observational milestones Major astronomical surveys, including DESI and the Dark Energy Survey, have completed extensive observations of galaxies and quasars to map the universe and study the nature of dark energy. 2 sources. https://clstr.news/cluster/dark-energy-surveys-complete-major-observational-milestones --- Cite as: Dark energy observational research and surveys. CLSTR, https://clstr.news/situations/dark-energy-observational-research-and-surveys