6/15/2023 0 Comments Earth moon viewerNote thatįigure of the phase angles above shows just one of the angles possible Is spherical, the boundary between light and shadow (night) is curved. Than half of the Moon's illuminated (day) side and it will look like a a curved When theĪngular distance is less than 90° separation, you on the Earth will Moon and the Sun, the less of its illuminated side you see. In fact, the smaller the angular distance between Only a small fraction of the Moon's illuminated side waning diagram below shows how this can be even though the Sun in the figure here is on the right side (one rotates the picture 180°, so the observer at D is facing up). Notice that the waning gibbous, third quarter, and waning crescent phases as seen from Earth are lit on the left side. The outer ring of Moon pictures in various phases is the view of the Moon as Moon as viewed from high above the Earth and Moon orbit. The half-lit moon on the inner circle around the Earth is the Other half (night side) faces away from the Sun. High above the Earth and Moon orbit, you can see that the Moon is always half Of its illuminated side that you can see from the Earth changes. The figure below shows that as the Moon orbits the Earth, the fraction The phases are due to how the Sun illuminates the Moon and the relative positioning Phase for any date and time between 1800-2199 (will display inĪnother window). Moon, third quarter occur nearly one week apart from each other. Moves through its phases in about four weeks, the phases of new moon, first quarter, full This time period is known as the Moon's synodic period. Up) to third quarter (opposite to the first quarter) and back to new. New (all shadow) to first quarter (1/2 appears to be in shadow) to full (all lit One of the most familiar things about the Moon is that it goes through phases from See my copyright notice for fair use practices. Video lecture for this chapter This material (including images) is copyrighted!. Astronomy Without a Telescope Phases and Eclipses Chapter index in this window
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