Tag

Astronaut Health

All articles tagged with #astronaut health

science-and-technology4 days ago•15 min saved

Why Kevlar Tethers Fail to Provide Artificial Gravity for Long-Duration Space Missions

A Kevlar tether connecting two spacecraft could theoretically generate artificial gravity via rotation, but practical engineering and physiological barriers make it unfeasible for long-term human habitation. While microgravity causes severe bone and muscle loss, creating a stable, comfortable rotating system requires a tether length of at least 1.6 km to avoid nausea, which introduces insurmountable stability challenges.

via Big Think|

#artificial-gravity #astronaut-health #human-physiology

science-and-technology7 days ago•6 min saved

Mars missions face severe physiological hurdles from gravity shifts, radiation, and confinement

While private firms and NASA advance Mars plans, a round trip could take three years, far exceeding current spaceflight records. The journey poses severe risks from zero-gravity muscle and bone loss, intense cosmic radiation, and psychological stress in confined spaces. Current countermeasures like exercise and experimental shielding are insufficient for the duration and isolation required, making human survival on the Red Planet a significant scientific challenge.

via BBC Sky at Night Magazine|

#astronaut-health #human-spaceflight #mars-exploration

science13 days ago•118 min saved

NYU Study Finds Human Genome Resilient to Short-Term Simulated Microgravity

Researchers at New York University have demonstrated that human cells maintain stable genome organization after 24 hours in simulated microgravity, challenging previous assumptions about immediate genetic damage in space. By using a custom random-positioning machine that minimizes fluid currents, the team isolated the effects of gravity from mechanical stress, finding no detectable DNA damage or disruption to the nuclear envelope. While the nucleus expanded and the nucleolus smoothed, these changes were distinct from the DNA damage caused by fluid flow in traditional rotating cultures. This finding supports the emerging concept of treating gravity as a variable 'dose' for health, though experts caution that long-duration spaceflight involves additional factors like radiation that this short-term experiment did not replicate.

via Space|

#astronaut-health #cell-biology #genetics

space1 month ago•139 min saved

Space constipation explained: microgravity reshapes gut bacteria and risks on long missions

A NASA-backed Nature Communications study analyzed more than 400 blood samples from 52 astronauts who stayed on the International Space Station for 2+ months (2006–2018) and found microgravity slows gut movement and shifts gut bacteria to ferment protein more than usual, helping explain space constipation. While dietary changes (caffeine, fish, fat) influence metabolites, microgravity is the main driver; the resulting protein‑fermentation byproducts may be linked to kidney stress, mood changes, and gut inflammation—risks that could grow on longer missions to Mars. Researchers suggest countermeasures like higher‑fiber diets, probiotics, or ways to boost peristalsis, noting the findings could also illuminate bed‑rest effects on Earth.

via Live Science|

#astronaut-health #gut-microbiome #long-duration-spaceflight

space2 months ago•6 min saved

NASA Sets Breathable Mars Dust Limit Ahead of Human Missions

NASA has formed the Martian Dust Limit Working Group to determine how much Martian dust astronauts can safely breathe before any crewed missions land. Mars dust is rich in perchlorates, silica, and heavy metals, raising cancer and health concerns—especially if Martian soil is used to grow crops in habitats. Experts emphasize prevention: keep dust out of habitats, remove it quickly when it enters, monitor airborne particles, and design life-support systems accordingly. Because no Mars dust has yet been returned for testing, the limit is based on lunar toxicology, simulated soils, and rover measurements.

via Boing Boing|

#astronaut-health #dust-toxicity #mars

science2 months ago•11 min saved

In Microgravity, the Body Rewrites Itself—and Some Changes Linger After Return

Months in space trigger a headward fluid shift that makes astronauts look puffy, while bones lose mineral, muscles shrink (calf ~15%), and the heart becomes smaller with less work to do; the spine lengthens in orbit and briefly grows taller, then returns after landing. Eye changes linked to spaceflight-associated neuro-ocular syndrome raise vision concerns on long missions. NASA’s Twin Study showed most changes reverse on return, but about 7% of gene activity remained altered for months and some cognitive and vascular changes persisted. Exercise and nutrition blunt these effects but don’t fully prevent them, underscoring the need for better countermeasures—possibly artificial gravity—for future multi-year missions to Mars.

via Space Daily|

#astronaut-health #bone-density #microgravity

space-exploration3 months ago•106 min saved

In-orbit X-rays: portable imaging debuts for astronauts and remote clinics

The Fram2 mission aboard SpaceX’s Crew Dragon achieved the first in-space X-rays. Four crew members, with about four hours of training, used a portable X-ray device to image a smartwatch, a hand, an abdomen, a pelvis, and a chest in orbit. The resulting images were good enough to aid injury diagnosis and hardware checks, and the device survived launch and re-entry with minimal damage. Experts say portable, rugged, compact X-ray systems could boost crew health care on future missions and even improve medical access on Earth in rural areas; researchers aim to further shrink and harden the technology. The study was published in Radiology on July 14.

via Space|

#astronaut-health #fram2 #portable-x-ray

science3 months ago•5 min saved

Orbiting X-Rays Break Ground in Space Medicine

SpaceX’s Fram2 mission conducted the first in-orbit medical X-ray scans with a portable X-ray device, capturing diagnostic-quality images of the hand, forearm, abdomen, pelvis, and chest that were reviewed by three radiologists. The inflight results show radiography can supplement ultrasound for astronaut health, diagnose injuries, and even assess equipment or space-suit integrity, marking a path toward more capable space diagnostics. Future work will aim to miniaturize and harden X-ray systems for vacuum and deep-space use, with real-time imaging guidance for astronauts on Moon missions.

via Gizmodo|

#astronaut-health #radiology #science

space-and-spaceflight4 months ago•18 min saved

Pencil-Sized Plasma Gun Aims to Sanitize Spacewear

A University of Alabama in Huntsville team has developed a pencil-sized cold-plasma “laundry gun” that blasts fabrics with a plasma jet to kill bacteria and odors, potentially keeping astronauts’ clothes cleaner in space. While proof-of-concept and small-scale, the technology could one day sterilize spacesuits and tools for long missions; researchers plan to increase the device size and add filters to reduce ozone byproducts as they work toward practical use in space.

via Gizmodo|

#astronaut-health #microbiology #plasma-physics

space-and-spaceflight6 months ago•17 min saved

Unexplained Illness Triggers NASA’s First ISS Medical Evacuation

NASA's Crew-11 faced an abrupt on-orbit medical emergency when Mike Fincke suddenly lost the ability to speak during dinner, prompting NASA's first ISS medical evacuation in 25 years; he was returned to Earth after on-board care using ultrasound, and doctors say the cause remains unclear but likely space-related, with researchers planning further investigation.

via gizmodo.com|

#astronaut-health #international-space-station #medical-evacuation

science6 months ago•4 min saved

Silent in Space: Fincke’s Mysterious Illness Shuts Down Spacewalk

NASA astronaut Mike Fincke suddenly couldn’t speak during a Jan. 7 meal on the International Space Station; doctors ruled out a heart attack and are continuing to investigate a roughly 20-minute episode that prompted a medical evacuation, the early return of the crew, and the cancellation of a planned spacewalk, with Fincke undergoing tests as NASA reviews for similar incidents.

via ScienceAlert|

#astronaut-health #in-space-illness #medical-evacuation

science9 months ago•0 min saved

NASA Ends Space Mission Early Due to Astronaut Health Concerns

NASA has decided to end the Crew-11 mission early due to a medical emergency involving an astronaut aboard the International Space Station, marking the first time such a decision has been made in the station's history.

via The Washington Post|

#astronaut-health #crew-11 #international-space-station

science10 months ago•7 min saved

NASA tests menstrual cups to manage periods in space for future Moon and Mars missions

New research explores the use of menstrual cups for astronauts, offering a sustainable and lightweight alternative to traditional menstrual management methods during long space missions, with successful tests conducted in space-like conditions and plans for further space testing.

via CBC|

#astronaut-health #long-term-space-travel #menstrual-cups

science1 year ago•5 min saved

NASA to Send Human Cells on Microchips to the Moon for Space Research

NASA is deploying tiny lab devices called organ chips with human cells aboard Artemis II to study how space affects human biology, focusing initially on bone marrow, to improve health protections for astronauts on lunar and Mars missions. These chips will help personalize medical care, predict responses to space radiation, and enhance safety during long-duration space travel.

via Earth.com|

#astronaut-health #deep-space-radiation #nasa

science1 year ago•2 min saved

Spaceflight Accelerates Human Stem Cell Aging and Activates 'Dark Genome'

Research shows that microgravity in space activates the 'dark genome' in human DNA, causing stem cells to age faster and potentially impairing astronauts' health, but new treatments may counteract these effects and benefit Earth-based medicine.

via Futurism|

#astronaut-health #dna #microgravity