61. NASA - Space Research - The G's In The Machine microgravity links The ISS microgravity environment (Johnson Space Center); microgravity Research Program Office (Marshall Space Flight Center); National Center for http://spaceresearch.nasa.gov/general_info/24jan_micro-g.html

writeCSS('/common/css/iestyles_general_info.css'); Please Note: This site is no longer being updated and is provided for historical purposes. The Office of Biological and Physical Research is now part of the Exploration Systems Mission Directorate and all appropriate content from this site has been moved to http://exploration.nasa.gov/ What is the OBPR? Strategic Vision ... FAQ's The G's in the Machine More OBPR General Articles More OBPR Research Updates Zero-g is a myth. Even in orbit, spacecraft experience tiny accelerations called "microgravity" that scientists monitor using a device named SAMS. Printer-Friendly Page Get Space Research News Delivered to Your Inbox! Listen to this story via streaming audio , a downloadable file January 24, 2003 : Anyone who says there's no sound in space has never actually been there. In the near-vacuum of open space, of course, "nobody can hear you scream," as the sci-fi thriller Alien famously put it. But onboard the space shuttle and the International Space Station (ISS), life is filled with activity and sounds. Some come from the pervasive plumbing, wiring, and mechanical hardware that fills every corner and cranny. If you were aboard, you'd hear air-circulation fans whirring, electric motors humming, pumps switching on and offconstant reminders that you're living in the bowels of a giant machine, switched "on."

62. Microgravity - Education Resource - StudySphere Education Portal, Educational Resource for language school, study abroad, education online, education, school, high school, career education, business school, driver education http://www.studysphere.com/education/Space-Microgravity-3507.html

63. Microgravity - Gravity Wiki The term microgravity is used to describe environments where the force of gravity is present but has a negligible effect. Objects in orbit are not perfectly weightless due to http://gravity.wikia.com/wiki/Microgravity

Wikia Skip to Content Skip to Wiki Navigation Skip to Site Navigation Wikia Navigation Start a wiki Entertainment Fall TV Auction Hunters ... Gravity Wiki Gravity Wiki Navigation Popular pages Earth's atmosphere UFT Earthquake ... Forum Random Page Wiki Activity Watchlist Recent changes Talk Microgravity Edit Edited by A Wikia contributor View full history File:Candlespace.jpg Candle flame in orbital conditions. The term microgravity is used to describe environments where the force of gravity is present but has a negligible effect. Objects in orbit are not perfectly weightless due to several effects: In Low Earth orbit , the force of gravity decreases by one part per million for every three meter increase in altitude. Objects which have a non-zero size will be subjected to a tidal force , or a differential pull, between the high and low ends of the object. In a spacecraft in orbit, the centrifugal force is greater on the side of the spacecraft furthest from the Earth. This is also a tidal force. Objects within a spacecraft will slowly "fall" toward the densest part of the spacecraft. When they eventually come to rest on the wall of the spacecraft, they will have weight. Though very thin, there is some air at the level of the

64. Microgravity The space station has what is called a microgravity environment. The first part of microgravity micro comes from the Greek mikros meaning http://spaceflight.nasa.gov/station/science/microgravity.html

65. Office Of Biological And Physical Research (OBPR) Conducts research to address challenges that are provided by the space environment and the human exploration of space. Offers a variety of project overviews and scientific papers. http://spaceresearch.nasa.gov/

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