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- From: bwebster@pages.com (Bruce F. Webster)
- Subject: Re: Lunar astronaut covers earth with thum
- Message-ID: <1992Nov18.191800.5680@pages.com>
- Sender: bwebster@pages.com
- Reply-To: bwebster@pages.com
- Organization: Banzai Research Institute
- References: <1992Nov17.122236.26582@hemlock.cray.com>
- Date: Wed, 18 Nov 1992 19:18:00 GMT
- Lines: 44
-
- In article <1992Nov17.122236.26582@hemlock.cray.com> dadams@cray.com (David
- Adams) writes:
- > In article 15162@mav.com, kevin@mav.com (Kevin Bagley) writes:
- >
- > |I'm always impressed with the illusion of the moon appearing larger
- > |near the horizon. Yes, it's only an illusion. Anyone want to
- > |explain the illusion?
- > |
- >
- > Let's see if I can get it right. When the moon appears near the horizon
- > it's light must traverse a greater amount of earths atmosphere. The
- > light rays are bent more and thus the atmosphere actually acts like
- > a magnifying lense when the moon (or sun) is in this position. (Did
- > I get it right?)
- >
-
- In article <1e9h76INN4nl@fido.asd.sgi.com> davep@paladin.corp.sgi.com (David
- Packer) writes:
- > Gee,
- >
- > A) Maybe lovell has extra small eyes...therefore reducing his
- > field of vision..making closer objects seem much larger than
- > objects farther away (look through a refractor from the wrong end).
- >
- > B) Don't atmospheric effects play a part in this?? Maybe it was an
- > exceptionally cold day on the moon...(so many errors in such a
- > short sentence).
- >
- > C) Reletively speaking...it is possible that the gravitational forces
- > of the earth bend light in slightly as they leave the earth. causing
- > the opposite of Eiensteins gravitational magnifyer...
- >
-
- Actually, it's just an honest-to-goodness optical illusion, i.e. your mind is
- playing tricks on you again. If you "measure" the moon's diameter using a ruler
- held at a fixed distance from your eyes at moonrise and then again when the
- moon is directly overhead, you'll find it has the same diameter both times.
- ..bruce..
-
- -------------------------------------------------------------------------------
- Bruce F. Webster | I grow old...I grow old...
- CTO, Pages Software Inc | dBASE II and Wordstar are no longer sold.
- bwebster@pages.com | -- Jeff Duntemann
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