What is dark energy?

In a 1998 research breakthrough, Saul Perlmutter of the University of California, Berkeley, and his colleagues in the Supernova Cosmology Project found the expansion rate of the universe is accelerating. Perlmutter and his team made the discovery by observing distant type Ia supernovae, whose brightnesses are well known, at different […]

NASA-developed Technology Supports Ocean Wind Speed Measurements from Commercial Satellite

A science antenna developed with support from NASA’s Earth Science Technology Office (ESTO) is now in low-Earth orbit aboard MuSat2, a commercial remote-sensing satellite flown by the aerospace company Muon Space. The dual-frequency science antenna was originally developed as part of the Next Generation GNSS Bistatic Radar Instrument (NGRx). Aboard […]

Signal announces a suite of call features, including the ability to share a link to a call, emoji reactions, a “raise hand” button, and a dedicated calls tab (Jay Peters/The Verge)

Jay Peters / The Verge: Signal announces a suite of call features, including the ability to share a link to a call, emoji reactions, a “raise hand” button, and a dedicated calls tab  —  Signal is making a bunch of improvements to calls so they are more competitive with Zoom […]