The New Moon is when the Sun and Moon are aligned, with the Sun and Earth on opposite sides of the Moon. At New Moon, the Sun, the Moon, and […]

Mercury consists of a large iron core surrounded by a thin rocky shell. Mercury’s cratered surface gives it an appearance similar to our Moon. © NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie […]

Earthshine is a dull glow which lights up the unlit part of the Moon because the Sun’s light reflects off the Earth's surface and back onto the Moon. A Waxing […]