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Space - 2016

Teacher: Mr. Allen
Horizontales
a star composed mainly of neutrons, they are what remain of stars after supernova explosions
The amount of light energy emitted per second
a total or partial obscuring of one celestial body by another
an imagi- nary line through the center of the planet
rocky objects, smaller than a planet, that are found between the orbits of Mars and Jupiter
The different appearances of the Moon as it orbits Earth
The time it takes a planet to move completely around the Sun
the remaining portion of a meteoroid that reaches Earth’s surface
Massive systems of stars, dust, and gas held together by gravity
the distance light travels in one year
An oval
The time it takes for one rotation
The planets beyond the inner planets—Jupiter, Saturn, Nep- tune, and Uranus
An object that revolves around a planet
Theory that expansion of the universe began about 14 billion years ago
Verticales
a large cloud of gas and dust in space
the small, dense core of a giant star that remains after the star has lost its exterior matter
the average distance from Earth to the Sun, equals 149,600,000 km
two atomic nuclei combine to form a larger nucleus with a higher mass
a region of space from which no matter or radiation can escape
The four planets closest to the Sun—Mercury, Venus, Earth, and Mars
he observed luminosity of a celestial body, such as a star, as observed from Earth
solid, interplanetary particles passing through Earth’s atmosphere
When a supergiant star explodes before dying
Sun-sized (about one to eight solar masses) stars use up their fuel become ____ ________.
a small, icy body in a highly elliptical orbit around the Sun