Labels:encyclical | fence | pier | pole | sea | sky | skyscraper | water OCR: pointof cent With a tradius about and Inass 11 percent ient Mars's gravity has beer to retain respectable, ssure thin, atmmosrhere Surf is about 2 percent that (on Earth the atmosph pressure is equal to Ma about 132,000 feet times the height of Mo Mars Everest) The atnosphe composed mainly dioxide with small nitrogen and argon a.nc tenths of a perceni of Mars has two srall Phobos and Deimos kilometers diameter tively. Irregularly radius mass retair table atmmosuhere atrmosul atnosph posed diamete