Moon Phase -- from Eric Weisstein's World of Astronomy

Moon phases occur with a period equal to the synodic period of the moon, equal to 29.530589 days, or 29 days, 12 hours, 44 minutes, 3 seconds. However, there is a great deal of variation in the actual time for a given lunation (the time between two successive new moons). The phase of the moon is determined by its position relative to the Sun (which illuminates the side of the Moon facing it) and the Earth (from where the Moon is observed). Moonrise and moonset times correspond directly to the

Mercury (Planet) - Wikipedia, PDF, Mercury (Planet)

Occultation, Lunar, Solar & Planetary

Newsletters - Unit - FPS

Solstice - New World Encyclopedia

Occultation, Lunar, Solar & Planetary

What will happen if Earth starts to rotate anticlockwise and time

Has the planet Mars reversed its rotation? - Quora

What is the easiest way to prove to someone that the Sun is bigger than the Earth? - Quora

Date of Easter - Wikipedia

Solar Eclipse -- from Eric Weisstein's World of Astronomy

Universe Today — Space and astronomy news

Solstice - New World Encyclopedia

Calendar, Chronology, History, & Types

Visual radiation astronomy - wikidoc