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Dictionary

Asteroid

Asteroid Astronomy dictionary, letter A Some tens of thousands of rock fragments are called asteroids or small planets, whose dimensions vary from a small rock to 1,000 km. in diameter, characterized by an irregular surface and the absence of atmosphere. About 95 percent of these bodies occupy a space between the orbits of Mars and Jupiter; however, some groups orbit near the Sun, Mercury and others move away to Saturn's orbit.
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Astronomy

Rescaling a radio image

After a radio image has been cleaned it is advised that the fluxes be rescaled if the source is near the galactic plane. Can someone explain why this is needed?
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