NASA withdrew two astronauts from the next crew on Friday to create room on the return voyage for the two stuck at the International Space Station.

NASA Cuts 2 From Next SpaceX Flight To Make Room For Astronauts Stuck At Space Station

NASA’s Nick Hague and Russian Aleksandr Gorbunov will launch the orbiting laboratory in September using a SpaceX rocket. In February, the duo will reunite with Suni Williams and Butch Wilmore. NASA felt it was too unsafe for Williams and Wilmore to return home in their Boeing Starliner spacecraft, which had propulsion issues and helium leaks.

NASA astronauts Zena Cardman and Stephanie Wilson were bumped from their SpaceX flight. NASA stated that they could fly on future missions.

The space agency considered spaceflight experience and other considerations while choosing.

After the shuttles were retired, the United States relied on Russia to transport crews to the space station until SpaceX began carrying humans in 2020. The two countries continue to exchange seats. Next month, NASA’s Don Pettit will launch to the space station, while NASA’s Tracy Dyson will return to Earth via a Russian capsule.

NASA Cuts 2 From Next SpaceX Flight To Make Room For Astronauts Stuck At Space Station

NASA turned to commercial enterprises a decade ago, seeking two competing US companies to transport humans in the post-shuttle era.

In June, Boeing’s first crew, Williams and Wilmore, arrived at the space station for a planned week-long stay. Their capsule will return empty as early as next Friday, aiming to land in the New Mexico desert.

SOURCE | AP

In a groundbreaking study recently published in *Science Advances*, scientists have revealed an astonishing new feature within the Earth’s outer core.

Using seismic waves from large earthquakes, researchers have uncovered a doughnut-like, or torus-shaped, structure buried deep beneath the planet’s surface.

This discovery provides fresh insights into the complex dynamics of Earth’s internal composition.

The research team, led by Professor Hrvoje Tkalcic, a geophysicist from the Australian National University, analyzed seismic waves that travel through Earth’s outer core.

These waves, generated by significant seismic events, offer valuable information about the core’s structure and composition.

Professor Tkalcic explained that the team focused on the slowing down of seismic waves as they passed through a specific area of the outer core near its boundary with the mantle.

“By understanding the paths of those waves and their travel times, we reconstructed their journey through the Earth’s outer core,” Tkalcic said.

The slowdown in wave velocity indicated the presence of a torus-shaped region within the outer core, oriented parallel to the equator. This discovery adds a new layer of complexity to our understanding of Earth’s interior.

New Study Reveals Low-Velocity Torus in Earth’s Outer Core

The study’s authors noted, “Thermochemical inhomogeneities in the outer core that enhance our understanding of the geodynamo have been elusive.

Seismic constraints on such inhomogeneities would provide clues on the amount and distribution of light elements in the core apart from iron and nickel.”

The researchers employed global coda correlation wavefield analysis to present evidence of a low-velocity volume within the outer core.

Their findings indicate that seismic waves travel more slowly in this equatorial torus compared to other regions Through waveform modeling, they determined that this torus has a velocity approximately 2% lower than the surrounding liquid outer core.

The study proposes that this low-velocity structure is likely of thermochemical origin, offering crucial insights into the dynamical processes of the Earth’s outer core.

This discovery represents a significant advancement in our understanding of planet’s internal dynamics and could have far-reaching implications for the study of geodynamics and the geodynamo.

 

SpaceX’s launches are on hold after a booster rocket caught fire while landing on Wednesday.

Following the early morning mishap off the Florida coast, the Federal Aviation Administration suspended the company’s Falcon 9 rockets and demanded an investigation. There were no reports of injuries or public damage.

FAA Grounds SpaceX After Rocket Falls Over In Flames At Landing

It’s too early to say how much this may affect SpaceX’s planned crew trips, one private and one for NASA. A billionaire’s chartered flight was delayed only a few hours earlier due to a poor weather forecast.

The rocket launched from Cape Canaveral Space Force Station, delivering all 21 Starlink internet satellites to orbit. However, the first-stage booster exploded in a fireball shortly after landing on an ocean platform, marking the first such disaster in years. This was SpaceX’s 23rd launch of this specific rocket, setting a recycling record.

The FAA stated that before SpaceX can resume Falcon 9 launches, it must accept its accident findings and corrective action. Following the accident, a launch from California with more Starlinks was canceled immediately.

SpaceX’s vice president, Jon Edwards, said the business is working “ASAP” to determine what went wrong.

“The loss of a booster is always heartbreaking. Each of them has its own past and personality. “Fortunately, this does not happen very often,” Edwards wrote on X.

Aside from the private spaceflight awaiting liftoff from Florida’s Kennedy Space Centre, the compnany is scheduled to send two astronauts for NASA late next month. Two seats will be reserved for the two astronauts who launched in June aboard Boeing’s new Starliner capsule and were declared dangerous by NASA for their return.

SOURCE | AP