Tag Archives: astronomy

Aurora

Posted on 2013-12-01 by arjaybe

Cloud of the Day – Aurora Aurora is not clouds. Clouds can’t form in the tenuous wisps of atmosphere found at the heights, approximately 90 – 1,000 kilometers, where aurora occurs. Therefore, it is wrong for me to call aurora … Continue reading →

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Size – Solar System

Posted on 2013-11-13 by arjaybe

The American National Optical Astronomy Observatory has provided a model that can be used to visualize the size of the Solar System. Various objects are used to represent the Sun and planets, such as a ball for the Sun and … Continue reading →

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Getting Down

Posted on 2013-04-12 by arjaybe

Speaking of infrasound, have you ever wondered about the lowest sound? Is there a lowest sound? Is it even reasonable to think about a lower limit to the frequency of sound? Definitions first. I will define sound as pressure waves … Continue reading →

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