Question

Short notes on first and last quarter?

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Answer 1

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• A full moon is easy to understand, the entire side of the moon that faces us is illuminated by the sun. We see the full circle. The first quarter and last quarter appears to be half a big as a full moon, but we call it a quarter because the most we ever see is half of the moon and at the first quarter phase, we are seeing half of that or a quarter of the entire moon.
• The first quarter moon would fit nicely there with its right-hand side illuminated. The last quarter moon is illuminated on the left side, considered anciently as unlucky, so you always shake with the right or lucky hand.
• The first quarter moon is seen in the evening while the last quarter moon doesn’t rise until midnight, so you shouldn’t be confused.

Answer 2

Explanation:

A week after New Moon, the Moon reaches its First Quarter. In this phase, the Moon is in quadrature (elongation = 90o, position C in the diagram below), and one half of the Moon's disk is illuminated as seen from Earth. The First Quarter Moon rises at noon, transits the meridian at sunset and sets at midnight

It is also called third quarter moon. See the moon phase for every day in 2021 on EarthSky's famous lunar calendar. ... A last quarter moon appears half-lit by sunshine and half-immersed in its own shadow. It rises in the middle of the night, appears at its highest in the sky around dawn, and sets around midday