Moon: Terminator Motion

Moon's Terminator

Where Is the Moon’s Terminator? How Does the Terminator Appear to Move? As viewed from the Northern Hemisphere, the full moon phase appears to be a white disk-shaped object in the night sky.  From one day to the next, the white disk changes shape as the white, lighted part decreases. The line separating the lighted [...]

Moon Illusion

moon smiling. jpg

Question: Why does the Moon follow us every were we go? Answer: Sky watchers from the beginning of time have observed the presence of the Sun and Moon no matter where they travel. Early astronomers’ explanation of this phenomenon was that Earth is flat and has a dome over it. The dome acted as a [...]

Moon Movements

The far side of the Moon is the side that never faces Earth, and it is not always dark. In fact, a little more than half of the Moon’s surface is lit all the time. From Earth, you can only see about half of the Moon’s surface and it is always the same. So how [...]

Moon Phases

moon phase

The Moon is the largest and brightest object in the night sky. It is also one of the most observed celestial body. Even so most children and adults have little knowledge about it. They know that the lighted part changes shapes and most know that it happens every month. But few know why. The Moon [...]

Waxing Moon vs. Waning Moon

moon-waxing-waning1

Questions: 1. In the picture, which moon phase is waxing, A or B? 2. In the picture, which moon phase is waning, A or B? Answer: From Earth, the Moon looks like a round disk in the sky. At times this disk appears to have part of it cut away or is overlapped by something [...]