The moon has phases with distinct appearances because it is constantly rotating around the Earth and being illuminated by the sun at different angles. The most common phases are the new moon, first quarter, full moon and... More » Science Astronomy

Moon phases occur because the angle of the Earth, moon and sun changes as the moon orbits the Earth. One-half of the moon is always illuminated by the sun. As a person's angle of sight changes, different portions of sunl... More » Science Astronomy Our Moon

The phases of the Moon are changes in the appearance of the Moon relative to the position of the Earth and the Sun. As the Moon travels through its monthly orbit, varying amounts of the side facing the Earth are illumina... More » Science Astronomy Our Moon

A solar eclipse occurs when the moon moves directly between the Earth and the sun. The moon's shadow travels over the surface of the Earth and blocks out the light from the sun seen on Earth. More » Science Astronomy

A lunar eclipse happens when Earth passes directly between the moon and the sun. During a lunar eclipse, the face of the moon appears to turn reddish as Earth occludes the sunlight that is normally hitting its surface. More » Science Astronomy

A total eclipse is an event in which the moon and sun are in perfect alignment with a spot on Earth. This occurrence is much more rare than an annual eclipse, in which the sun leaves a halo of light around the moon. A ra... More » Science Astronomy

A lunar eclipse happens when the Earth's shadow is cast on the moon, and a solar eclipse takes place when the moon passes between the Earth and the sun and casts its shadow onto the Earth. A solar eclipse can only happen... More » Science Astronomy