" In astronomy and cosmology, space is the vast 3-dimensional region that begins where the earth's atmosphere ends."
" Space is usually thought to begin at the lowest altitude at which satellites can maintain orbits for a reasonable time without falling into the atmosphere.This is approximately 160 kilometers (100 miles) above the surface." More Information like above can be obtained by playing this trivia. This trivia is designed for all age groups to gather maximum knowledge.
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