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Kerbal
The sum of all partial pressures in the lungs must add up to the ambient pressure. The composition of gas inside the lungs includes the vapor pressure of H₂O at body temperature which is about 0.9 psi....
Yes, your fracture would still hurt in microgravity. Likely worse. Pain from a fracture comes from inflammation and soft tissue damage around the fracture, not just mechanical loading of the fracture ...
Space debris poses a real risk for spacecraft in LEO. From the Technical Report on Space Debris UN Committee on the Peaceful uses of Outer Space (Table 5), a satellite in orbit can expect to collide ...
The commissioning process involves 130+ steps, in a specific order, which takes months. If you never start, you never finish. There is no advantage to delay. Deployment has almost no effect on ...
“Aluminum, rather than steel, comprises most of the outer shell of the modules” https://science.nasa.gov/science-news/science-at-nasa/2001/ast14mar_1 . Aluminum has low melting point and softens ...
Answer: The sun has an outrageously strong magnetic field. The corona is highly ionized and interacts with the magnetic field. This produces corona symmetry around the magnetic pole axis. The corona ...
There is actually no relationship between the two. In a simple 2-body problem, each orbit starts and ends in the same place with the same velocity vector. The "delta" in "delta-v" ...
The orbit is more oval than elliptic since it is centered on... well, the center, rather than one focus. It is roughly perpendicular to the Sun-Earth axis. The orbital period 6 months. Radius of the ...
Question: will JWST catch up with L2 or will L2 catch up with JWST? Answer: To a first approximation, both. And neither. The answer depends on the frame of reference you chose. Case 1: In a rotating ...
Wikipedia defines “orbital insertion” as either acceleration or deceleration to allow entry into a stable orbit. To answer your question, where a spacecraft has been launched into low earth orbit and ...
A smart-ass answer to the question “Why aren’t the booms painted black?” would be, “Because they are already made of black material.” This doesn’t answer the puzzle of, “Why are supports coated in ...
According to this dated but enjoyable Scientific American article https://sciences.ucf.edu/class/wp-content/uploads/sites/23/2020/01/Hazen-The-evolution-of-minerals-Scientific-American.pdf, Earth is ...
Cavitation occurs when fluid pressure is below the fluid's vapor pressure. In other words, the liquid boils. In a rocket, the propellant tank outlet is pressurized by ullage and acceleration. It is ...
It’s interesting that you excluded the poles from your question. If the Moon’s axis was perpendicular to the ecliptic, you could (in theory) mount solar panels on a vertical mast at the poles and ...
Great question to illustrate small but measurable effects of orbital mechanics! NO, even if both wrench and ISS are idealized point masses in the same circular orbit. The mass of the ISS imposes a non-...
Answer: to avoid eclipses by the Moon. See: Why are eclipses of the James Webb by the Earth or Moon not permitted during the mission? . It discusses NASA's decision not to allow any lunar eclipses of ...
According to the Wikipedia article on Luna 1, “The Soviet engineers did not trust automated systems for controlling the engine burns, so they communicated to the rocket via radio. The signal to stop ...
The key here is that the graph shows acceleration in a rotating frame of reference. The line shows the sum of gravitational acceleration and centrifugal acceleration, which are opposite in direction. ...
“As of Feb 2019, there are 31 satellites in the GPS constellation, 27 of which are in use with the rest allocated as stand-bys… More decommissioned satellites are in orbit and available as spares.” ...
Respiratory gasses interact with the respiratory system, hemoglobin and respiring tissues through their partial pressures. Room air is 21% O2 @ 760mmHg, or a partial pressure of 160mmHg. So, at first ...
Yes. There has been at least one color blind pilot astronaut. “Color Blindness” covers such a wide range of conditions, the term is almost useless. It would be counterproductive to disqualify all ...
Spaceflight Associated Neuro-Ocular Syndrome (SANS) (formerly called visual impairment and intracranial pressure syndrome) is a group of findings and symptoms that have been found in astronauts who ...
The Chinese missile/glider was in LEO for some of its path, then re-entered the atmosphere as a glider. There is a good article in the Economist: https://www.economist.com/china/2021/10/23/chinas-test-...
“100% reliable” may be unattainable, but “Dang close” is already routine in hospitals. Dry heat sterilization is possible, but requires long exposure times which can damage many materials. Etylene ...
To just answer your question, Einstein says “yes”. All uniformly accelerating frames of reference are the same. A sort of related topic used in SF plots is flotation tanks used to protect crew from ...
Liquids boil when their vapor pressure exceeds ambient pressure. The structure of Starship tanks limits ambient pressure to 6 bar. Therefore, to prevent boiling you must refrigerate to below -170 °C (...
Respiratory gasses interact with the respiratory system through their partial pressures. Room air is 21% O2 @ 760mmHg, or a partial pressure of 160mmHg. So, at first glance, it would seem that ...
It is not mandatory that the two vessels have zero relative velocity, but it would make the operation more controlled (and therefore less exciting). Having vessels in close proximity with significant ...
SpaceX has developed a CH4/O2 ICE: The Raptor. We don’t usually think of liquid fueled rockets as ICEs, but they are: compression, ignition, expansion and all that. It is very difficult to run an ICE ...
Crewed space missions are very unlikely to need transfusions. Most people will never need a transfusion during their lives. And if they do, it will likely be when they are elderly. Most transfusions ...