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The agency says an old NASA satellite has crashed to Earth over the Sahara desert.



An old NASA satellite known as the Reuven Ramaty High Energy Solar Spectroscopic Imager or Rhessi has crashed to Earth over the Sahara Desert.

On Thursday, the agency said it had received no reports of damage or injury from the spacecraft.

The crash happened early in the morning in Sudan.

While most of the 660-pound satellite was expected to burn up while tumbling through Earth’s atmosphere, NASA expected some parts to survive the fall after nearly 21 years in orbit.

NASA STATES that a retired spacecraft will re-enter Earth’s atmosphere at some risk to humans.

This illustration provided by NASA shows the RHESSI (Reuven Ramaty High Energy Solar Spectroscopic Imager) solar observation satellite. ((NASA via AP))

NASA has previously stated that the chance of someone being hit by debris is about one in 2,567.

According to the National Oceanic and Atmospheric Administration’s National Environmental Satellites, Data and Information Service, an average of 200 to 400 tracked objects enter the Earth’s atmosphere each year.

NASA reports that the Department of Defense’s Global Space Surveillance Network sensors track more than 27,000 pieces of orbital debris, with much more debris existing in the near-Earth space environment.

Launched in 2002, Ressy observed solar flares from its low Earth orbit until decommissioning in 2018 due to communication problems.

The NASA logo can be seen at its headquarters.

NASA logo at the headquarters in Washington, D.C. on June 7, 2022. ((Photo by STEPHANIE REYNOLDS/AFP via Getty Images))


The spacecraft launched aboard an Orbital Sciences Corporation Pegasus XL launch vehicle.

Prior to Ressy, no gamma-ray imaging or high-energy X-ray images of solar flares had been made.

Data from the satellite and its imaging spectrometer have helped provide vital information about solar flares and associated coronal mass ejections.

Ressi satellite over Earth

This illustration provided by NASA shows the RHESSI (Reuven Ramaty High Energy Solar Spectroscopic Imager) solar observation satellite. ((NASA via AP))

During his mission, Ressy recorded more than 100,000 X-ray flares, helping scientists learn more about the energy of solar flares.


“Over the years, Ressy has documented a huge range of solar flare sizes, from tiny nanoflares to massive superflares, tens of thousands of times larger and more explosive. Ressy even made discoveries unrelated to flares, such as improving measurements of the shape of the Sun and showing that ground-based gamma-ray flares – bursts of gamma rays emitted high in the earth’s atmosphere during thunderstorms – are more common than previously thought. in a NASA statement.

The Associated Press contributed to this report.


NASA Researchers Create 3D Printable Superalloy for Extreme Conditions: GRX-810



Using a model-based alloy design approach and laser-based additive manufacturing, materials scientists at NASA have developed a new NiCoCr-based alloy strengthened by oxide dispersion.

NASA researchers create 3D-printable superalloy for extreme environments: GRX-810 first appeared on Sci.News: Breaking Science News.

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Tiny C. elegan worms feed on weed and cannabis, study finds



In 2016, Sean Lockery was finishing up a week of studying worm eating habits when he decided to do a fun experiment on a Friday afternoon.

Oregon legalized recreational marijuana last year, so Lockery and fellow researchers at the University of Oregon wanted to see how the drug worked on hookworms. They showered microscopic worms with a cannabinoid molecule and placed high-calorie and low-calorie foods next to them.

The worms swarmed toward the high-calorie, bacterial food—Lockery’s decision was tantamount to choosing pizza over oatmeal. V study published on Thursday — the unofficial marijuana holiday on April 20 — Oregon researchers have determined that worms, like humans, become hungry and begin to chew when exposed to cannabis.

“It helps us place ourselves in the animal universe in a new way, enhancing the commonality between humans, with their huge and wonderful brains, and the tiny microscopic worm,” Lockery, professor of biology and neuroscience, told The Washington Post.

Around 1990, Lockery began studying decision-making processes in Caenorhabditis eleganstranslucent nematodes with a simple brain and no circulatory or respiratory systems.

In June 2016, Lockery was researching how C. elegans decides which bacteria to eat when he and his team began planning their weekly fun experiment. When they thought about the possible impact marijuana, the researchers thought, “Well, let’s see what happens,” Lockery said.

“We try to keep a sense of humor about what we do and that keeps us light and creative,” Lockery said. “And this research came in part from that spirit.”

Marijuana, which contains tetrahydrocannabinol (THC), has long been known to induce hunger in humans by raising hunger hormones, activating parts of the brain that control hunger, and raising dopamine levels. Research has also found that rodents crave high-calorie foods after consuming THC.

In their lab in Oregon, the researchers poured a cannabinoid called anandamide about 50 C. elegans. The scientists moved the worms into a T-maze and placed high-calorie food on one side and low-calorie food on the other.

Although C. elegans generally prefer high-calorie foods, they ate more of them after exposure to anandamide and avoided low-calorie foods more than usual. In subsequent experiments, the researchers found that anandamide made neurons more sensitive to odors of high-calorie foods.

“This is the first time chewing gum has been demonstrated in an invertebrate,” Lockery said. “So it’s a big step up from what we currently think of as sort of the limit of the Munch.”

While the Oregon researchers’ study was due to be published last month, Lockery said Current Biology has delayed it until April 20.

Lockery hopes this research will inspire further research into how cannabis affects animals, insects and other organisms. He believes more drugs can be tested on C. elegans to predict how they will affect people.

Lockery is now studying how psychedelics affect the behavior of worms.

“My project from the very beginning was to try to figure out how the whole – albeit tiny – brain works,” Lockery said. “I didn’t really care much about drugs. I never expected this. But I’m grateful for it; it was really fun.”

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Pennsylvania students will hear from a NASA astronaut aboard the space station



Students from the North Allegheny School District in McCandless, Pennsylvania this week will have the opportunity to listen to a NASA astronaut aboard the International Space Station.

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