Astronomy Vocabulary Crossword

scientific study of the universe
describes the concept of an Earth-centered universe
describes the view that the Sun is at the center of the solar system
an oval; the shape that the orbits of the planets are thought to be
the average distance from Earth to the Sun
the spinning of a body, such as Earth, about its axis (causes day/night)
the motion of one body around another, as Earth around the Sun (causes the year)
a slow motion of Earth’s axis that traces out a cone over a period of 26,000 years
occurs when the moon moves in a line directly between Earth and the Sun, casting a shadow on Earth.
occurs when the moon passes through Earth’s shadow.
a cloud of gas and/or dust in space
– the transfer of energy (heat) through space by electromagnetic waves
a group of stars, dust, and gases held together by gravity
is the center of mass of two or more bodies that are orbiting each other
occurs when the nuclei split into smaller nuclei and emit neutrons and heat energy
the way in which the Sun produces energy; when nuclei combine