BBC: A Zenit-3SL rocket, launched earlier today by Sea Launch AG, failed 40 seconds into its flight. The launch was the fifth by the company since 2011, when it had reemerged from bankruptcyâmdash;caused by a previous launch failure. Now owned by a Russian consortium, Sea Launch is one of many companies competing to launch geostationary telecommunications satellites. The Zenit-3SL rocket uses a mobile oceanic launch pad, which can be moved to the equator, where Earth’s rotational energy boosts the rocket’s lift capacity. The rocket has a reliable launch record, and the reason for the failure is unknown. It was carrying the Intelsat-27 satellite, a 6.4-ton communications satellite designed by Boeing, which would have helped provide direct-to-home television and internet signals.
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.