microgravity


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microgravity

(mÿ-kroh-grav -ă-tee) The very low gravity encountered on spacecraft in Earth orbit, leading to a condition of near weightlessness. The behavior of liquids and gases in microgravity differs markedly from that observed on Earth. Hydrostatic pressure is small, sedimentation is suppressed, and dynamic effects, such as thermal convection, disappear. Space missions dedicated to the study of materials and living matter in microgravity include Eureca, the International Microgravity Laboratory, and the US Microgravity Laboratory.

microgravity

[‚mī·krō′grav·əd·ē]
(mechanics)
A state of very weak gravity, such that the gravitational acceleration experienced by an observer inside the system in question is of the order of one-millionth of that on earth.
References in periodicals archive ?
As shown in Figure 4 aircraft managed to achieve 3,7 seconds' microgravity time.
Changes in the HRMT system and the effects on function due to microgravity have yet to be studied directly.
This experiment is designed to test how microgravity affects phytoplankton chlorophyll deterioration rates.
com/heart-health-space-astronaut-muscle-strength-down-because-blood-oxygen-2536768) research has shown astronauts lose up to half of their exercise strength within about six months in space because the microgravity changes the way blood vessels move the red blood cells that carry oxygen through the body.
These experiments included simulated vibration tests, bio-compatibility tests and simulated microgravity experiments as well as systematic matching experiments and rehearsals.
government agencies and by academic and private institutions, providing access to the permanent microgravity setting, vantage point in low Earth orbit, and varied environments of space.
A series of simulation studies were carried out investigating changes in heart shape deformation in earth's gravity and during microgravity exposure.
The research of Mary Kearns-Jonker of Loma Linda University in California and Roland Kaunas of Texas A&M University will gauge the impact of microgravity on fundamental stem cell properties.
In this report, Bradamante and colleagues examined endothelial cells in real microgravity aboard the International Space Station and conducted deep gene expression and protein analysis on the cells.
The firm previously partnered with NASA through the agency's Flight Opportunities Program to test a prototype on suborbital simulated microgravity flights.
According to deDiego, who also serves as SSEP Community program director, "our findings imply that microgravity does affect tooth decay adversely because bacteria produces more lactic acid in microgravity.