News & Events

An international team of scientists, including HAO scientist Matthias Rempel, has announced the discovery of Kelvin-Helmholtz instability (KHI) in the form of small, swirling, whirlpool-like patterns on the surface of the Sun. The research indicates that KHI might be a key reason why the Sun's outer atmosphere gets so hot, and why magnetic energy builds up and moves around on the Sun, ultimately fueling solar flares and eruptions that can affect Earth.

We welcome Dr. Mike Wiltberger as HAO Interim Director. His 22 years at HAO, combined with his scientific expertise and inter‑agency experience at NSF, make him exceptionally well prepared for this leadership role.

In December 2025, NASA selected the Chromospheric Magnetism Explorer (CMEx) for an extended period of concept development. The $150 million mission would fill a critical solar observational gap, generating information on conditions that lead to solar eruptions, advancing our knowledge of the solar magnetic field, and improving space weather modeling capabilities. It would also be the first Explorer-sized spacecraft mission ever led by NSF NCAR.

"Physical foundations of spectroscopy," by Philip Judge, highlights how spectroscopy is firmly anchored in physical foundations, countering modern trends leading to over-specialization. Published by Oxford University Press as a text in their master series in particle physics, astrophysics and cosmology.