Gibbous Moon
20 Days Old

Gibbous Moon 20 Days Old

Image Details:

Telescope: Takahashi FSQ-160N @ F8 (850mm)
Wikipedia Notes: A lunar phase or phase of the moon is the appearance of the illuminated portion of the Moon as seen by an observer, usually on Earth. The lunar phases vary cyclically as the Moon orbits the Earth, according to the changing relative positions of the EarthMoon and Sun. One half of the lunar surface is always illuminated by the Sun (except during lunar eclipses), and hence is bright, but the portion of the illuminated hemisphere that is visible to an observer can vary from 100% (full moon) to 0% (new moon). The boundary between the illuminated and unilluminated hemispheres is called the terminator.
Mount: Losmandy G11 with Gemini Goto
Camera: SBIG ST-10XME w/CFW-8A & Custom Scientific 3nm H-Alpha Filter
Exposure: 0.2 Seconds
Location: Kirkland, WA USA
Date: August 28th 2002