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Russian cosmonauts install X-ray detector, jettison trash on spacewalk outside ISS | Space

Cosmonauts Alexey Ovchinin and Ivan Vagner installed an X-ray detector and jettisoned trash during a spacewalk outside the International Space Station on Dec. 19.

SpaceX inks deal to launch 2 more astronaut missions to the ISS | Space

California-based company Vast Space has booked two crewed flights to the ISS with SpaceX, though the missions still must be approved by NASA.

Watch Russian cosmonauts install new X-ray detector during ISS spacewalk today (video) | Space

Russian cosmonauts Alexey Ovchinin and Ivan Vagner will perform a six-and-a-half-hour spacewalk on Dec. 19 to install new equipment outside the ISS. Watch it live here, courtesy of NASA.

'Missing link' black hole in the Milky Way's densest star cluster is still missing | Space

A "missing link" black hole in Omega Centauri is still missing. What appeared to be an intermediate-mass black hole was a cluster of stellar-mass black holes.

Double moon mission! SpaceX to launch 2 private lunar landers in January | Space

Firefly Aerospace and Japanese company ispace are putting their moon landers on the same SpaceX Falcon 9 rocket, which is scheduled to lift off in mid-January.

Solving Problems Submitted to MAA Journals (Part 2a) – Mean Green Math

The following problem appeared in Volume 53, Issue 4 (2022) of The College Mathematics Journal. This was the first problem that was I able to solve in over 30 years of subscribing to MAA journals. Suppose that $latex X$ and $latex Y$ are independent, uniform random variables over $latex [0,1]$. Now define the random variable…

SpaceX launching 30 satellites on Bandwagon-2 rideshare mission early Dec. 21 | Space

SpaceX plans to launch 30 satellites on a rideshare mission called Bandwagon-2 early Saturday morning (Dec. 21).

Space2Sea Antarctica: A student journalist's expedition to bottom of the world begins | Space

Space2Sea Antarctica marks the inaugural voyage in a series produced by FUTURE of SPACE (FoS). Student journalist Gabe Castro-Root of American University is chronicling the mission for FoS.

Aerosol forces mesoscale secondary circulations occurrence: evidence of emission reduction | Research Communities by Springer Nature

How calcium-regulated reprogramming primes legume root cells to welcome beneficial rhizobia symbionts | Research Communities by Springer Nature

Legumes host symbiotic nitrogen-fixing rhizobia within root nodules. To deliver rhizobia to nodules, the plant transiently creates cytoplasmic bridges to allow rhizobia entry and progression. Here we dissected the underlying extensive ultrastructural reprogramming and fine-tuned calcium regulation.