Planets and Moons  ID: 4310

Moon Phases Loop

This short looping animation shows a complete cycle of lunar phases. The view is geocentric, lunar north up. The frames are at intervals of 3 hours, with a total length of 236 frames representing a synodic month of 29.5 days. To find the frame number corresponding to a particular age in days, use the formula

frame number = ( days × 8 ) + 1

The depiction of phases here is idealized: It ignores both libration and subsolar latitude. In effect, it assumes that the Moon's orbit is perfectly circular and that both its orbit and its equator are in the plane of the ecliptic. In reality, the Moon's orbit is an ellipse inclined 5.1° to the ecliptic, and its axis is tilted another 1.5° from its orbit. These conditions combine to make the Moon's true cycle of phases more complex than what is shown here. See for example this visualization of lunar phases and libration for 2015.

The following images are frames from the animation representing particular phases. Each caption gives both the name of the phase and its age, or time since New Moon. Lunar north up corresponds to the view from northern latitudes; for southern hemisphere observers, the images should be rotated 180 degrees.
 

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Visualization Credits

Ernie Wright (USRA): Lead Visualizer
Please give credit for this item to:
NASA's Scientific Visualization Studio

Short URL to share this page:
http://svs.gsfc.nasa.gov/4310

Mission:
LRO (Lunar Reconnaissance Orbiter)

Data Used:
LRO/LROC/WAC 643nm High Sun Global Mosaic
LRO/LOLA/Digital Elevation Map
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.

This item is part of these series:
The Moon
LRO - Animations

Keywords:
SVS >> Albedo
SVS >> Elevation data
SVS >> HDTV
SVS >> Laser Altimeter
SVS >> Lunar
SVS >> Moon
SVS >> Hyperwall
SVS >> LRO
SVS >> Lunar Reconnaissance Orbiter
SVS >> LOLA
SVS >> LROC
SVS >> Lunar Topography
SVS >> Lunar Elevation Map
SVS >> Solar System >> Moon >> Lunar Surface
NASA Science >> Planets and Moons
SVS >> Presentation