I can calculate the motions of the heavenly bodies, but not the madness of people

— Sir Isaac Newton

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Hurricane Forecasters Keep Access to Threatened Defense Department Satellite Data

Scientific American.com - Tue, 07/29/2025 - 12:22pm

Microwave satellite data that are key to capturing changes in a hurricane’s strength will not be taken from meteorologists as originally planned

Categories: Astronomy

Trump’s EPA Targets ‘Endangerment Finding’ Underlying Climate Change Policy for Reducing Carbon

Scientific American.com - Tue, 07/29/2025 - 12:20pm

The Trump administration is releasing its proposal to undo the “endangerment finding,” the long-standing rationale and legal imperative for regulating greenhouse gases under the Clean Air Act

Categories: Astronomy

Is gravity a new type of force that arises from cosmic entropy?

New Scientist Space - Cosmology - Tue, 07/29/2025 - 12:00pm
Decades ago, a renegade physicist suggested that gravity isn't so much a force as just a byproduct of the universe's tendency to get more disordered. Now this idea might finally be testable
Categories: Astronomy

NASA Drop Test Supports Safer Air Taxi Designs

NASA - Breaking News - Tue, 07/29/2025 - 11:30am
An aircraft body modeled after an air taxi with weighted test dummies inside is being prepared for a drop test by researchers at NASA’s Langley Research Center in Hampton, Virginia. The test was completed June 26, 2025, at Langley’s Landing and Impact Research Facility. The aircraft was dropped from a tall steel structure, known as a gantry, after being hoisted about 35 feet in the air by cables. NASA researchers are investigating aircraft materials that best absorb impact forces in a crash.NASA/Mark Knopp

As the aviation industry works to design air taxis and other new electric aircraft, there’s a growing need to understand how the materials behave. That’s why NASA is investigating potential air taxi materials and designs to best protect passengers in the event of a crash.

On June 26, 2025, at NASA’s Langley Research Center in Hampton, Virginia, researchers dropped a full-scale aircraft body modeled after an air taxi from a tall steel structure, known as a gantry.

The NASA researchers behind this test and a previous one in late 2022 investigated materials that best absorb impact forces, generating data that will enable manufacturers to design safer advanced air mobility aircraft.

Image Credit: NASA/Mark Knopp

Categories: NASA

NASA Astronaut Kate Rubins, First to Sequence DNA in Space, Retires

NASA - Breaking News - Tue, 07/29/2025 - 10:10am
NASA Astronaut Kate RubinsNASA

NASA astronaut and microbiologist Kate Rubins retired Monday after 16 years with the agency. During her time with NASA, Rubins completed two long-duration missions aboard the International Space Station, logging 300 days in space and conducting four spacewalks.
 
“I want to extend my sincere gratitude to Kate for her dedication to the advancement of human spaceflight,” said Steve Koerner, acting director of NASA’s Johnson Space Center in Houston. “She is leaving behind a legacy of excellence and inspiration, not only to our agency, but to the research and medical communities as well. Congratulations, Kate, on an extraordinary career.”
 
Rubins’ first mission to the orbiting laboratory began in July 2016, aboard the first test flight of the new Soyuz MS spacecraft. As part of Expedition 48/49, she contributed to more than 275 scientific experiments, including molecular and cellular biology research, and she was the first person to sequence DNA in space. Her work enabled significant advances with in-flight molecular diagnostics, long-duration cell culture, and the development of molecular biology tools and processes, such as handling and transferring small amounts of liquids in microgravity. Rubins also led the integration and deployment of biomedical hardware aboard the space station, supporting crew health and scientific research in space and on Earth.
 
She again launched in October 2020, aboard a Soyuz spacecraft from the Baikonur Cosmodrome in Kazakhstan, taking part in Expedition 63/64. Alongside her crewmates, Rubins spent hundreds of hours working on new experiments and furthering research investigations conducted during her mission, including heart research and multiple microbiology studies. She also advanced her work on DNA sequencing in space, which could allow future astronauts to diagnose illness or identify microbes growing aboard the station or during future exploration missions.
 
“From her groundbreaking work in space to her leadership on the ground, Kate has brought passion and excellence to everything she’s done,” said Joe Acaba, chief of the Astronaut Office at NASA Johnson. “She’s been an incredible teammate and role model. We will miss her deeply, but her impact will continue to inspire.”
 
In addition to her flight assignments, Rubins served as acting deputy director of NASA’s Human Health and Performance Directorate, where she helped guide strategy for crew health and biomedical research. More recently, she contributed to developing next-generation lunar spacesuits, helping prepare for future Artemis missions to the Moon.
 
 
Before her selection as an astronaut in 2009, Rubins received a bachelor’s degree in molecular biology from the University of California, San Diego, and a doctorate in cancer biology from Stanford University Medical School’s Biochemistry Department and Microbiology and Immunology Department. After returning from her second space mission, Rubins commissioned as a major in the U.S. Army Reserve, serving as a microbiologist in the Medical Service Corps. She currently holds the role of innovation officer with the 75th U.S. Army Reserve Innovation Command’s MedBio Detachment, headquartered in Boston. 


A frequent keynote speaker at scientific, educational, and industry events on space biology, biomedical engineering, and human exploration, Rubins has advocated for NASA’s scientific and exploration missions. As she transitions from government service, she remains committed to advancing innovation at the intersection of biology, technology, and space.
 
“It has been the honor of a lifetime to live and work in space,” said Rubins. “I am grateful for the extraordinary advances at NASA, and it was a privilege to serve and contribute to something so meaningful. The mission of exploration continues, and I can’t wait to watch this nation do what once seemed impossible.”
 

Learn more about how NASA explores the unknown and innovates for the benefit of humanity at:

https://www.nasa.gov/

-end-

Raegan Scharfetter

Johnson Space Center, Houston

281-910-4989

raegan.r.scharfetter@nasa.gov

Categories: NASA

Solar-powered ambush drones can wait for targets like land mines

New Scientist Space - Cosmology - Tue, 07/29/2025 - 8:02am
Russian ambush drones have been seen in Ukraine fitted with cheap solar panels, which enable them to lurk indefinitely, waiting for a target to come near
Categories: Astronomy

Tomb of Ancient Maya City’s First Ruler Has Been Uncovered by Archaeologists

Scientific American.com - Tue, 07/29/2025 - 6:45am

A team of archaeologists excavating the ancient Maya city of Caracol discovered the tomb of its first ruler, which contained pottery, jadeite jewelry and a rare death mask

Categories: Astronomy

VV27 road to liftoff

ESO Top News - Tue, 07/29/2025 - 5:00am
Video: 00:07:00

Highlights and liftoff of Vega-C flight VV27 from Europe’s Spaceport in French Guiana, at 23:03 local time on 25 July (03:03 BST/04:03 CEST on 26 July).

Flight VV27 was operated by Arianespace and launched Airbus’s four CO3D satellites and the French space agency CNES MicroCarb mission.

The four small satellites in the CO3D constellation (an abbreviation of the French 'Constellation Optique en 3D') are set to map the globe in three dimensions from low Earth orbit, to serve public and private sector needs.

MicroCarb is designed to map sources and sinks of carbon dioxide on a global scale. ESA coordinated and procured the launch of MicroCarb on behalf of the European Commission, as part of its In-Orbit Demonstration / In-Orbit Validation (IOD/IOV) programme.

Categories: Astronomy

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APOD - Mon, 07/28/2025 - 4:00pm

Can some supernovas explode twice?


Categories: Astronomy, NASA