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The _________is a stream of electrically charged particles that extend outward from the sun's corona.
__________ predicted the existence and orbit of Neqtune based on Neptune's gravitational effect on the orbit of Uranus.
When a meteoroid enter Earth's atmosphere, it produces a streak of light called a __________.
Most _________________ thought that all celestial objects revolved around Earth.
Regions on the surface of mars have patterns that appear to have been made by _____________.
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