Vacuum

From ExoDictionary
Jump to: navigation, search
This definition article has been automatically generated.
You can help ExoDictionary by expanding, updating, or correcting it.


This autostub has not yet had its initial copyediting proof and may contain significant formatting and even factual errors. You can improve Exodictionary by cleaning up the page markup and verifying that the definition is correct and then removing this tag.


This autostub has not yet had its initial categorization proof and may be categorized incorrectly. You can improve Exodictionary by removing inappropriate categories and then removing this tag.


Vacuum

</dt>
1. A given space filled with gas at pressures below atmospheric pressure. Various approximate ranges are:
low vacuum, torr 760 to 25;
medium vacuum, torr 25 to 10-3;
high vacuum, torr 10-3 to 10-6;
very high vacuum, torr 10-6 to 10-9;
ultrahigh vacuum, torr 10-9 and below. </dd>
2. In reference to satellite orbital parameters, without consideration of the perturbing effects of an atmosphere, as in vacuum perigee, vacuum apogee. [[/a>|/a> ]]

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use