16 MAR 2014 by ideonexus
Dyson Spheres
The material factors which ultimately limit the expansion of a technically advanced species are the supply of matter and the supply of energy. At present the material resources being exploited by the human species are roughly limited to the biosphere of the earth, a mass of the order of 5 X 10^19 grams. Our present energy supply may be generously estimated at 10^20 ergs per second. The quantities of matter and energy which might conceivably become accessible to us within the solar system are ...Folksonomies: astronomy extraterrestrials
Folksonomies: astronomy extraterrestrials
1 The energy and time required to dismantle a planet and turn it into a biosphere surrounding a sun.
13 MAY 2013 by ideonexus
Dyson Spheres
The purpose of this report is to point out other possibilities which ought to be considered in planning any serious search for evidence of extraterrestrial beings. We start from the notion that the time scale for industrial and technical development of these beings is likely to be very short in comparison with the time scale of stellar evolution. It is therefore overwhelmingly probable that any such beings observed by us will have been in existence for millions of years, and will have already...
1 An extraterrestrial civilization grown to a certain population will need to harvest the full resources of it's environment. By converting a planet like Jupiter into a shield around the system's star, the civilization could maximize the use of the sun's output.
06 JAN 2013 by ideonexus
There's No Such Thing as a "One-Handed Scientist"
The rub, of course, is that everybody else thinks that science should provide the answers. Remember the Concorde? Back in the early 1970s, Congress was debating supersonic transport, trying to decide whether such aircraft would represent a danger when flown over the United States. Would their big engines flying high in the sky cut a hole in the ozone and let in solar radiation? Would the plane make sonic booms as it flew over people’s neighborhoods? And so on.
Senator Edmund Muskie (D-ME) wa... 1 
notes
notesScientists must consider all the evidence and factor nuance into their positions. This is illustrated with an interesting historical anecdote about a Congressional review concerning the safety of the Concord jet.
18 MAR 2012 by ideonexus
Nuclear Winter
In discussing the state of the atmosphere following a nuclear exchange, we point especially to the effects of the many fires that would be ignited by the thousands of nuclear explosions in cities, forests, agricultural fields, and oil and gas fields. As a result of these fires, the loading of the atmosphere with strongly light absorbing particles in the submicron size range (1 micron = 10-6 m) would increase so much that at noon solar radiation at the ground would be reduced by at least a fac...Folksonomies: environmentalism
Folksonomies: environmentalism
1 notes
notesAn explanation of the science behind this concept and the back-of-the-napkin calculation.
