A cosmological driver of cosmic expansion
The Vera C. Rubin Observatory has begun the Legacy Survey of Space and Time, a 10-year program that will image the southern sky every few nights. The telescope has started regular operations from its Chilean mountaintop site and is already returning new detections, including thousands of asteroids and transient views such as Comet 3I/ATLAS.
Scientists have captured the Sun’s surface at unprecedented resolution with the Daniel K. Inouye Solar Telescope and other instruments and have identified widespread Kelvin–Helmholtz vortices—500–2,000km spirals of magnetised plasma. The team has linked these instabilities to how magnetic energy cascades to smaller scales and feeds flares and coronal mass ejections that produce space weather.
NASA has launched the $4–4.3 billion Nancy Grace Roman Space Telescope from Kennedy Space Center aboard a SpaceX Falcon Heavy. The observatory has separated cleanly and is heading to Lagrange Point 2, about one million miles from Earth, for a five‑year primary mission to map billions of galaxies, search for exoplanets and study dark matter and dark energy.
The LUX‑ZEPLIN (LZ) collaboration has reported a single unexplained particle interaction recorded on 16 June 2023 at the Sanford Underground Research Facility that matches the expected signature of a WIMP. The team has presented the finding at a conference, uploaded a paper and asked the wider physics community for scrutiny; the result falls short of the 5‑sigma discovery threshold.