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January 22, 2010 January 30, 2010

Posted by orionrising in Observing.

Photorealistic Image in Stellarium

Object: Moon

Site: Front Yard

Seeing: Average

Transparency: 3

Type: Solar System Object

Size: 1.6 degrees

Magnitude: -10.73

Constellation: Pisces

Magnification: 10x

FOV: 4.8 degrees

Observing Time: 9:55 pm – 10:30 pm

Notes: Second time observing the moon, close to one month after my first observation with new binoculars!  This time I was able to draw a relatively more detailed picture of the moon, seen here in first quarter (once I get the camera, I will post my sketch).  Noticed how the top-right area was more smooth and contained more maria, while the bottom-left area contained less maria but was densely packed with terrae and impact craters.  When the moon was formed 4.45 billion years ago, rocks of different densities and albedo values (the degree to which they reflect light) coalesced and formed the moon.  Without going into much detail, the different densities and early volcanic activity gives rise to the broad spectrum of lunar features seen today, and the different reflection capabilities of the rocks give rise to the darkness of the maria and the brightness of the terrae.  A thin layer of regolith (lunar dust) coats the surface of the moon.  n Psc (3.80) at bottom right of FOV.


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