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NASA’s Orion capsule made a blisteringly fast return from the Moon Sunday, parachuting into the Pacific off Mexico to conclude a test flight that should clear the way for astronauts on the next lunar flyby.

The incoming capsule hit the atmosphere at Mach 32, or 32 times the speed of sound, and endured reentry temperatures of 5,000 degrees Fahrenheit (2,760 degrees Celsius) before splashing down west of Baja California near Guadalupe Island. A Navy ship quickly moved in to recover the spacecraft and its silent occupants — three test dummies rigged with vibration sensors and radiation monitors.

NASA hailed the descent and splashdown as close to perfect, as congratulations poured in from Washington..

“I’m overwhelmed,” NASA Administrator Bill Nelson said from Mission Control in Houston. “This is an extraordinary day… It’s historic because we are now going back into space — deep space — with a new generation.”

The space agency needed a successful splashdown to stay on track for the next Orion flight around the Moon, targeted for 2024 with four astronauts who will be revealed early next year. That would be followed by a two-person lunar landing as early as 2025 and, ultimately, a sustainable Moon base. The long-term plan would be to launch a Mars expedition by the late 2030s.

Astronauts last landed on the Moon 50 years ago. After touching down on December 11, 1972, Apollo 17′s Eugene Cernan and Harrison Schmitt spent three days exploring the valley of Taurus-Littrow, the longest stay of the Apollo era. They were the last of the 12 Moonwalkers.

Orion was the first capsule to visit the Moon since then, launching on NASA’s new mega Moon rocket from Kennedy Space Center on November 16. It was the first flight of NASA’s new Artemis Moon program, named after Apollo’s mythological twin sister.

“From Tranquility Base to Taurus-Littrow to the tranquil waters of the Pacific, the latest chapter of NASA’s journey to the Moon comes to a close. Orion back on Earth,” announced Mission Control commentator Rob Navias.

While no one was on the $4 billion test flight, NASA managers were thrilled to pull off the dress rehearsal, especially after so many years of flight delays and busted budgets. Fuel leaks and hurricanes conspired for additional postponements in late summer and fall.

In an Apollo throwback, NASA held a splashdown party at Houston’s Johnson Space Center on Sunday, with employees and their families gathering to watch the broadcast of Orion’s homecoming. Next door, the visitor center threw a bash for the public.

Getting Orion back intact after the 25-day flight was NASA’s top objective. With a return speed of 25,000 mph (40,000 kph) — considerably faster than coming in from low-Earth orbit — the capsule used a new, advanced heat shield never tested before in spaceflight. To reduce the gravity or G loads, it dipped into the atmosphere and briefly skipped out, also helping to pinpoint the splashdown area.

All that unfolded in spectacular fashion, officials noted, allowing for Orion’s safe return.

“I don’t think any one of us could have imagined a mission this successful,” said mission manager Mike Sarafin.

Further inspections will be conducted once Orion is back at Kennedy by month’s end. If the capsule checks find nothing amiss, NASA will announce the first lunar crew amid considerable hoopla in early 2023, picking from among the 42 active U.S. astronauts stationed at Houston’s Johnson Space Center.

“People are anxious, we know that,” Vanessa Wyche, Johnson’s director, told reporters. Added Nelson: “The American people, just like (with) the original seven astronauts in the Mercury days, are going to want to know about these astronauts.”

The capsule splashed down more than 300 miles (482 kilometers) south of the original target zone. Forecasts calling for choppy seas and high wind off the Southern California coast prompted NASA to switch the location.

Orion logged 1.4 million miles (2.25 million kilometers) as it zoomed to the Moon and then entered a wide, swooping orbit for nearly a week before heading home.

It came within 80 miles (130 kilometers) of the Moon twice. At its farthest, the capsule was more than 268,000 miles (430,000 kilometers) from Earth.

Orion beamed back stunning photos of not only the gray, pitted Moon, but also the home planet. As a parting shot, the capsule revealed a crescent Earth — Earthrise — that left the mission team speechless.

Nottingham Trent University astronomer Daniel Brown said the flight’s many accomplishments illustrate NASA’s capability to put astronauts on the next Artemis Moonshot.

“This was the nail-biting end of an amazing and important journey for NASA’s Orion spacecraft,” Brown said in a statement from England.

The Moon has never been hotter. Just hours earlier Sunday, a spacecraft rocketed toward the Moon from Cape Canaveral. The lunar lander belongs to ispace, a Tokyo company intent on developing an economy up there. Two U.S. companies, meanwhile, have lunar landers launching early next year.


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Astronomers Spot Galaxy NGC 3640 With a Past of Consuming Smaller Galaxies

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Astronomers Spot Galaxy NGC 3640 With a Past of Consuming Smaller Galaxies

An elliptical galaxy located 88 million light-years from Earth has been observed displaying unusual characteristics, with astronomers identifying it as a cosmic predator. The latest images captured by the Very Large Telescope (VLT) at the European Southern Observatory (ESO) indicate that the galaxy, designated NGC 3640, has a history of consuming smaller galaxies and may soon engulf another. The galaxy’s distorted structure and the faint, diffused light surrounding it serve as evidence of its turbulent past, as per reports. Positioned just above a smaller galaxy, NGC 3641, the larger body appears to be on a trajectory that could lead to a future merger. The study of such interactions provides insights into the evolutionary patterns of galaxies.

Evidence of Past Galactic Mergers

According to research published in Astronomy & Astrophysics, signs of previous mergers have been detected within NGC 3640. The structural distortions observed, coupled with the presence of older stellar populations, suggest that remnants of previously absorbed galaxies are embedded within its formation. Astronomers at the Italian National Institute for Astrophysics have analysed the remnants, with findings indicating that ancient stars from the original galaxy serve as markers of past collisions. The faint glow surrounding NGC 3640 is attributed to these past interactions, demonstrating the lasting effects of galactic mergers.

Upcoming Galactic Collision

Reports suggest that while NGC 3641 remains intact, its eventual fate may align with the ongoing patterns of NGC 3640. As galaxies interact, their gravitational forces distort their structures, often leading to eventual mergers. Current observations indicate no immediate impact on NGC 3641, implying that significant interactions have yet to begin. ESO officials have stated that galaxies undergo structural changes over time due to the absorption of gas and stars from their surroundings. This process has been linked to the unique shape and features displayed by NGC 3640.

Gravitational Influence and Cosmic Evolution

The gravitational forces exerted by approaching galaxies can trigger large-scale changes in their structures. Astronomers have been closely monitoring such interactions to gain a deeper understanding of galactic evolution. The observations made using the VLT provide an opportunity to study these cosmic processes in detail, with researchers continuing to track the potential merger between NGC 3640 and its smaller companion. The findings contribute to broader studies on the dynamic nature of galaxies and their role in shaping the universe over billions of years.

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Scientists Discover Declining Global Ocean Evaporation Amid Rising Temperatures

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Scientists Discover Declining Global Ocean Evaporation Amid Rising Temperatures

A decline in global ocean evaporation has been identified over the past decade, despite rising sea surface temperatures. This shift challenges established climate models, which have long linked higher temperatures to increased evaporation. The unexpected trend was observed through satellite data analysis, revealing that evaporation rates started decreasing after 2008. Researchers suggest that changing atmospheric circulation patterns and reduced wind speeds may be influencing this reversal, highlighting the complexity of Earth’s climate system.

Study Reveals Key Climate Anomalies

According to the study published in Geophysical Research Letters, an assessment of ocean heat flux data was conducted by researchers from the Institute of Geographic Sciences and Natural Resources Research at the Chinese Academy of Sciences. It was found that while ocean evaporation had been rising from 1988 to 2008, a reversal occurred thereafter, leading to a decline between 2008 and 2017.

The study’s lead author, Dr. Ma Ning, told Phys.org that two-thirds of the global oceans have shown reduced evaporation rates since the late 2000s. This decline contradicts previous expectations that global warming would consistently drive higher evaporation levels. The research suggests that large-scale atmospheric circulation shifts, particularly in the Northern Oscillation Index, may be contributing to the changes.

Impact of Wind Stilling on Evaporation

A decline in wind speed, referred to as “wind stilling,” has been identified as a crucial factor in this unexpected trend. Lower wind speeds result in reduced surface turbulence, thereby limiting the exchange of moisture between the ocean and the atmosphere. The study indicates that this phenomenon may be linked to broader climate oscillations affecting atmospheric circulation.

Dr. Ma explained that while evaporation levels have declined, this should not necessarily be viewed as a weakening of the global hydrological cycle. Instead, it may be an indication of natural climate variability influencing regional and global weather patterns. Researchers continue to investigate how these findings may affect long-term climate predictions.

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Arabia Had Five Times More Rainfall 400 Years Ago, Study Finds

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Arabia Had Five Times More Rainfall 400 Years Ago, Study Finds

Extreme rainfall in Arabia was five times more intense 400 years ago, as indicated by recent climate reconstructions. The data suggests that the region, currently defined by arid desert, once had significantly higher precipitation levels, resembling a lush savannah. The findings highlight the necessity for improved climate preparedness as urbanisation expands in the region.

Study Reveals Significant Rainfall Variability Over Centuries

According to the study published in Science Advances, researchers from the University of Miami Rosenstiel School of Marine, Atmospheric, and Earth Science discovered that the Arabian Peninsula had significantly higher rainfall over the last 2,000 years. The landscape, now barren, was once covered with vegetation and inhabited by wildlife such as lions, leopards, and wolves. Findings indicate that 200 years ago, rainfall was still double what it is today.

Deep-Sea Brine Pools Provide Uninterrupted Climate Record

As per reports, sediment cores were extracted from a deep-sea brine pool in the Gulf of Aqaba using a remotely operated vehicle (ROV) deployed from the research vessel OceanXplorer. The brine’s chemistry enabled the preservation of undisturbed sediment layers, allowing an accurate reconstruction of Late Holocene rainfall trends.

Implications for Climate Preparedness in the Middle East

Speaking to Phys.org, Sam Purkis, Professor and Chair of the Department of Marine Geosciences at the University of Miami Rosenstiel School, stated that the study underscores the importance of climate resilience as development projects like NEOM in Saudi Arabia reshape the region. The assumption of long-term climate stability is not reliable, according to Amy Clement, a Professor in the Department of Atmospheric Sciences at the same institution.

Urgency for Enhanced Flood and Drought Management

The Middle East, already vulnerable to extreme weather, faces rising instances of flash floods and droughts. The catastrophic flooding seen across the Arabian Peninsula in early 2024 reinforces the need to study historical rainfall patterns to improve disaster preparedness. Mattie Rodrigue, Science Program Director at OceanX, highlighted the importance of technological advancements in climate research to better predict future hydroclimate trends.

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