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4.2.1 -- Exploring Space

Horizontales
A type of telescope that collects radio waves instead of light waves
USA's first space station
Reusable space transports used to transport satellites and astronauts to space
Most common and useful unit of measure for the solar system; one AU is distance from Sun to Earth's orbit
The galaxy our solar system is part of
Distance a photon of light travels in 1 year
A type of telescope that collects light from space and magnifies images of objects
First successfully placed satellite
Unit of measure used when the number of light years between objects climbs into the high thousands or millions
Verticales
All the billions of galaxies
Powerful engines used to send satellites and space probes into space
Satellite with mission to photograph the dark side of the moon
Buildings that house telescopes
The USA's first satellite
First space probe to maintain an orbit around another planet (Mars)
Anything that revolves around a planet or other object