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Space

Name_________________________________
Across
Something that orbits around another object; for example, a moon orbiting a planet or a human-made object orbiting Earth.
Something that orbits around another object; for example, a moon orbiting a planet or a human-made object orbiting Earth
The force that causes objects with mass to attract one another.
National Aeronautics and Space Administration; the American governmental agency dedicated to space exploration.
A reusable spacecraft designed to transport people and cargo between Earth and space.
An orbiting space satellite, construction of which began in 2001 with the cooperation of 16 nations; used for scientific and space research.
Earth-like.
A group of interacting or interdependent parts forming a complex whole; for example, all the factors or variable in an environment, or all the planetary bodies revolving around a star.
A celestial body of ice, dust, and rock with an elongated and elliptical orbit.
Objects such a s planets, moons, and stars that are located in the sky or in space.
The luminous celestial body around which Earth and other planets revolve and from which they receive heat and light.
Any of the planets, Jupiter, Saturn, Uranus, and Neptune, whose orbits lie beyond the asteroid belt.
Any of the large celestial bodies that revolve around the Sun in the solar system.
An unmanned spacecraft designed to explore the solar system and transmit data back to Earth.
Down
The force that pulls two objects toward each other; the greater the mass of an object, the greater the attraction; the further apart the objects, the weaker the attraction.
The investigation of physical conditions in space and on stars, planets, and other celestial bodies through the use of satellites, space probes, or spacecraft with human crews.
A celestial body that revolves around a planet.
A building or place given over to or equipped for observation of natural phenomena.
The four largest and brightest moons of Jupiter, which were discovered by Galileo Galilei: Ganymede, lo, Callisto, and Europa.
Any of the rocky, terrestrial planets of Mercury, Venus, Earth, and Mars, whose orbits are inside the asteroid belt.
The Sun together with the group of planets and other celestial bodies that are held by its gravitational attractions and revolve around it.
An engine that provides thrust directly through the burning of its fuel without requiring the intake of air.
The gravitationally-curved path of an object around a point in space.
A person trained to be part of a spacecraft crew.
Large and small rocks or metallic masses orbiting the sun; made up of materials similar to those that formed the planets.
An instrument for viewing or detecting distant objects.
A ball of gas in space that produces its own light and heat.
A small object that enters Earth's atmosphere from space and burns due to friction, emitting light.
A vehicle for exploring the surface of an extraterrestrial body (Such as the Moon and Mars).