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Space and Astronomy

Across
a fixed luminous point in the night sky which is a large, remote incandescent body like the sun.
the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
unit of astronomical distance equivalent to the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 trillion miles).
a region of space having a gravitational field so intense that no matter or radiation can escape. INFORMAL
a fixed luminous point in the night sky which is a large, remote incandescent body like the sun.
a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun.
Down
a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction
the star around which the earth orbits.
an imaginary line about which a body rotates.
the collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
a small rocky body orbiting the sun. Large numbers of these, ranging in size from nearly 600 miles (1,000 km) across (Ceres) to dust particles, are found (as the asteroid belt ) especially between the orbits of Mars and Jupiter, though some have more eccentric orbits, and a few pass close to the earth or enter the atmosphere as meteors.
the envelope of gases surrounding the earth or another planet.