Space dust analyzed


  • Anonymous


Millions of tiny particles of ‘space dust,’ or interstellar debris, are known to be trapped in earth orbit. At altitudes above 60,000 ft. the dust is relatively free of contaminants from terrestrial sources (i.e., from volcanic eruptions, nuclear blasts, and ‘pollution’) and is accessible for sampling by high-flying aircraft, such as the U-2. The results of isotope analysis of grains obtained from just such a U-2 mission indicate that these samples of space dust could have the same origin as meteorities. Another possibility is that the dust could be the residue of passing comets.