"Rama" wrote in message
...
| 1. It is said that moon illusion is psychological perception, not
| physical i.e it got nothing to do with atmospheric refraction.
| 2. The horizone full moon is at farther distance compared to overhead
| moon. This variation in distance is physical.

By one Earth radius, and anyway the moon appears larger
near the horizon than overhead.
It should appear smaller, therefore the effect is psychological.
The reason it appears larger is the background, the effect is in
photographs, too.


| So as moon illusion is psychological, it should work if earth itself
| is removed. Now just observer(you) in space. Imagine one moon at
| distance of 390,000 km straight before your eyes(horizone moon) and
| second moon at distance of 384,000 km above (overhead moon).
|
| As moon illusion is psychological, 'horizone moon' should look larger
| than 'overhead moon'.
|
It does. shrug

| On same logic, any distant object in space should look larger than
| closer object.
|
| Please point out any mistake.
|
The moon only seems larger when compared to trees, houses, objects
that are on the ground. By looking through a tube to hide them the
effect goes away. Holding your thumb up (or a coin) at arms length
to obscure the moon will quickly show you the size is the same on the
horizon or overhead.