V - W
the letter that (probably) leads off the word in question. Please
suggest new words or corrections.
radiation belts: The belt of radiation around the Earth
that shields us from harmful rays emitted by the Sun.
second planet from the Sun. It is a rocky (solid) planet and
is always shrouded in cloud cover. It is also known as the "morning
star" or "evening star".
A star that perceptibly changes its illumination. See "Cepheid
A point in the sky where the celestial equator crosses the ecliptic
and where the Sun is located on the first day of spring in the
Northern Hemisphere. See "Celestial Equator".
small, dense remnants of a sunlike star in its last phase of life.
It shines from stored heat.