FACTOID # 94: Australians lead the world in hours worked and membership in many voluntary organizations. How do they find the energy?
 
 Home   Encyclopedia   Statistics   Countries A-Z   Flags   Maps   Education   Forum   FAQ   About 
 
WHAT'S NEW
RECENT ARTICLES
More Recent Articles »
 

Encyclopedia > Milliarcsecond

A milliarcsecond (m, mas) , or a thoundsanth of an arcsecond. Astronomical distances to stars are sometimes given in mas, such as in the Hipparcos catalogue. This unit can be converted to parsecs (pc) by taking the inverse: 1000 mas = 1/pc


  Results from FactBites:
 
Diameters of stars (993 words)
For the Keck telescope, 10 meters in diameter, the resolution at wavelengths used by the human eye is only 20 milliarcsecond (0.02 arcseconds).
For reference, a person standing on the moon would have an angular height of 1.0 milliarcseconds.
The largest star shown, Hamal, also known as alpha Cassiopeiae, is 6.88 milliarcseconds in diameter.
  More results at FactBites »

 

COMMENTARY     


Share your thoughts, questions and commentary here
Your name
Your location
Your comments
Please enter the 5-letter protection code


Lesson Plans | Student Area | Student FAQ | Reviews | Press Releases |  Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms.