Guardian: After costing more than $10 billion and taking nearly two decades to build, the Space Based Infrared System (SBIRS) ground station outside Harrogate, UK, is ready to go on line, writes Jamie Doward of the Guardian. The ground station, located at a Royal Air Force base, consists of 33 satellite dishes that receive data from SBIRS’s four satellites 39â000 km above Earth. The satellites are designed to detect hostile missile launches. Tracking the missiles is the job of a second space-based system, the Space Tracking and Surveillance System, which is under construction. The UK-based element of SBIRS is controversial because it could itself become the target of a missile attack.
The finding that the Saturnian moon may host layers of icy slush instead of a global ocean could change how planetary scientists think about other icy moons as well.
Modeling the shapes of tree branches, neurons, and blood vessels is a thorny problem, but researchers have just discovered that much of the math has already been done.
January 29, 2026 12:52 PM
Get PT in your inbox
PT The Week in Physics
A collection of PT's content from the previous week delivered every Monday.
One email per week
PT New Issue Alert
Be notified about the new issue with links to highlights and the full TOC.
One email per month
PT Webinars & White Papers
The latest webinars, white papers and other informational resources.