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Health threats from cosmic rays are the dangers posed by cosmic rays to astronauts on interplanetary missions or any missions that venture through the Van-Allen Belts or outside the Earth's magnetosphere. [ 1][ 2] They are one of the greatest barriers standing in the way of plans for interplanetary travel by crewed spacecraft, [ 3][ 4][ 5] but ...
This is a list of star systems within 75–80 light years of Earth . The closest B-type star, Regulus, is in this list. Star system ← → ← →. Median distance ( ly ) Stars in system. Spectral type. Apparent magnitude (V) Comments and references.
The field strength of electromagnetic radiation is measured in volts per meter (V/m). [ 2]: 139. The most common health hazard of radiation is sunburn, which causes between approximately 100,000 and 1 million new skin cancers annually in the United States. [ 3][ 4] In 2011, the World Health Organization (WHO) and the International Agency for ...
Apophis to make 2029 flyby to Earth. Apophis is projected to pass within 20,000 miles of our planet’s surface on April 13, 2029. For the superstitious lot, yes, that's a Friday, no less. On that ...
The remembering of the past as having been better than it really was. Saying is believing effect: Communicating a socially tuned message to an audience can lead to a bias of identifying the tuned message as one's own thoughts. [176] Self-relevance effect: That memories relating to the self are better recalled than similar information relating ...
The paradox is this: with the young Sun's output at only 70 percent of its current output, early Earth would be expected to be completely frozen, but early Earth seems to have had liquid water [ 2] and supported life. [ 3] The issue was raised by astronomers Carl Sagan and George Mullen in 1972. [ 4] Proposed resolutions of this paradox have ...
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