Description:
Space and planetary science and related technical work. (Moderated)
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Interplanetary Transport Network transit times
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Hi sps!
Does anyone know about how long transit times in the ITN [1] are and how
often there are launch windows? I guess the launch windows are at least
one between 2 oppositions of the start and destination bodies.
Specifically, how long are travel times from Earth to Mars, asteroid
belt, Jupiter and moon (and vice versa).... more »
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Mass Spectrometer on ISS
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Does anyone know if any useful data is being generated by this device. There have been a number of Sun related things going on recently, but I'd not seen much said about these.
Brian
-- ...The email is valid as bria...@blueyonder.co.uk
Blind user.
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A math question about acceleration over a distance
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Let us say that you had a 62,000-mile-long Earth-anchored space
elevator and let us say it has an electro-magnetic repulsion
accelerator along its entire length. If you were to accelerate a
human so that he experienced only 2g (twice the force of gravity)
during the entire length of the space elevator, what velocity would... more »
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Simple astronomic cut off experiment and absurdities of blackbody radiation concept
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Simple astronomic cut off experiment and absurdities of blackbody radiation concept It is a common practice to send a u.e.m in radio domain to a celestial body (Moon, Mercury etc.) and analyze the reflected wave on the surface of that specific body. The frequency of u.e.m must be in a certain frequency interval, called radio wave window, where Earth... more »
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orbit programs
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Can anyone recommend a program that will calculate the motions of asteroids, say three of them at most, which is fairly simple in that it takes into account only the Sun's gravitational attraction, and that of the asteroids - ignoring planetary perturbations. Also, don't believe my computer will support Java- as I understand, Windows does... more »
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Moon Microbe Mystery Finally Solved
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Moon Microbe Mystery Finally Solved [link] The still from the old 16mm film is very telling. The "clean room" standards of the day were obviously primitive by today's standards. Jeff
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Big Bang a local event?
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Even though everything we can detect was apparently a product of the Big Bang, and exhibits red shift, isn't it rather parochial to presume that "everything everywhere" was a product of the Big Bang?
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Solar storm radiation on Moons nightside
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It is well known that charged particle radiation poses a significant risk to all manned spaceflights outside Earths magnetic field. It is also clear that by its nature this radiation can not be complitely blocked by simple line of sight shielding: with small scale geometry there is little shadowing effect.... more »
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Singularities
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Do they exist anywhere other than in the center of black holes?
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atmosphere using heavy elements, or why not just waste lots of comets
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Past topics have talked of making atmospheres on moon, but in hundred to thousand years due to low gravity solar wind strips away H and O and N atoms. First, can one add a buffer heavy gas to slow migration of H and O and N to top of atmo where solar wind strips it off?. Noble gases come to mind like Radon but I think they are anesthia gases, and I wonder if... more »
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