This galaxy cluster comes from a sample of over 200 that were studied to determine how giant black holes at their centers affect the growth and evolution of their host galaxy. This study revealed that an unusual form of cosmic precipitation enables a feedback loop of cooling and heating, stifling star formation in the middle of these galaxy clusters.
Abell 2597, shown here, is a galaxy cluster located about one billion light years from Earth. This image contains X-rays from NASA’s Chandra [...]
Growing up as a planet with more than one parent star has its challenges. Though the planets in our solar system circle just one star -- our sun -- other more distant planets, called exoplanets, can be reared in families with two or more stars. Researchers wanting to know more about the complex influences of multiple stars on planets have come up with two new case studies: a planet found to have three parents, and another with four.
The discoveries were made using instruments fitted to telesc [...]
SLS will be the most powerful rocket ever built for deep space missions, including to an asteroid and eventually Mars.
NASA and The Boeing Co., prime contractor for the SLS core stage, have teamed up for thrust vector control actuator vibration testing with the Redstone Test Center's Dynamic Test Division on Redstone Arsenal in Huntsville, Alabama. The actuators are hydraulic-powered, piston-like motors that control the RS-25 engine gimbal position to change the engine thrust angle with respe [...]
Soyuz TMA-14M Commander Alexander Samokutyaev and Flight Engineer Elena Serova are counting to their departure March 11 with Expedition 42 Commander Barry Wilmore. The two cosmonauts trained on Soyuz descent procedures and checked out emergency communications gear. Wilmore also prepared for his departure and began packing gear for the return home.
Meanwhile, One-Year crew members NASA astronaut Scott Kelly and cosmonaut Mikhail Kornienko are in Star City, Russia, getting ready for final quali [...]
NASA's Curiosity Mars rover is expected to remain stationary for several days of engineering analysis following an onboard fault-protection action on Feb. 27 that halted a process of transferring sample material between devices on the rover's robotic arm.
Telemetry received from the rover indicated that a transient short circuit occurred and the vehicle followed its programmed response, stopping the arm activity underway at the time of the irregularity in the electric current.
"We are r [...]
What dark structures arise from the Pelican Nebula? Visible as a bird-shaped nebula toward the constellation of a bird (Cygnus, the Swan), the Pelican Nebula is a place dotted with newly formed stars but fouled with dark dust. These smoke-sized dust grains formed in the cool atmospheres of young stars and were dispersed by stellar winds and explosions.
Impressive Herbig-Haro jets are seen emitted by a star on the right that is helping to destroy the light year-long dust pillar that contains i [...]
Like the lost little puppy that wanders too far from home, astronomers have found an unusually small and distant group of stars that seems oddly out of place. The cluster, made of only a handful of stars, is located far away, in the Milky Way’s “suburbs.” It is located where astronomers have never spotted such a small cluster of stars before.
The new star cluster was discovered by Dongwon Kim, a PhD student at the Australian National University (ANU), together with a team of astronomer [...]
As a pair of astronauts cleans up their spacesuits after completing a set of spacewalks, more nanosatellites were deployed from Japan’s Kibo lab module. The International Space Station also raised its orbit Tuesday morning to set the stage for the upcoming crew departure.
Astronauts Barry WiImore and Terry Virts scrubbed the cooling loops inside the spacesuits after their third and final spacewalk on Sunday. They also sampled the water from the loops and talked about their experiences with [...]
The comments on the torus station post made it clear that I had skipped steps in suggesting a specific station type. One step is the investigation of exactly how many RPMs are acceptable for a working orbital facility. The acceptable RPMs dictate the length of the station arms to achieve a given gee level. The required arm length or torus diameter needs to be known before design starts, and long before construction starts.
I suggest that an initial investigation on the ground could be a 10 meter radius unit with a 3 meter inclined floor around the circumference. There would be a bit over 190 square meters of available floor area when the unit is spun up. The floor area would be divided into offices, bathrooms, kitchens, bedrooms, and other requirements as needed.
The unit would be spun up to the design RPM for that particular design. There would be one acceptable RPM for any fixed floor angle with several different units for different investigations. This would be terrestrial construction and relatively cheap compared to anything launched which would make multiple units on the ground affordable compared to launching sub-optimal stations.
The unit is spun up to design RPM with the intention that it will spin continually for several months at a time. Several shifts of investigators work in the facility on short and long term ‘missions’. Some works 8 hours plus lunches and go home at night exiting through the hub without stopping the unit. Entry, exit, and transition through the spokes would be part of the experiments. Others stay for 30 days straight, while yet others do business visits of minutes to hours.
The purpose would be to determine whether 10 or more RPM can be adapted to in a working environment. I would see the experimenters as being perhaps one department of a company or government facility totaling between 20 and 100 people on a near continuous basis plus many visitors. The quality of an individuals work compared to their normal performance in regular environments would be a good baseline to prove/disprove the possibility of very short radius stations for people in high stress and workload environments as during a space mission.
The long term investigators would exit fairly often for family functions and such which would be the spin equivalent of going to the microgravity sections of the station or an EVA. The ability to conduct the investigation without missing the kids recital or your wedding anniversary would make it possible to get long term volunteers.
After determining the acceptable RPMs for people in a real working environment it wold be much easier to design a real working station. A 5 meter spin radius in orbit is a totally different animal than a 1000 meter radius. If the ability to adapt to high RPMs eliminates 99% of the population, then there would still be about 3 million people in this country to select from plus several times that number world wide.