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The Planets and Stars

Scientist believe Mercury survived impact with a giant _______.
Betelgeuse is the tenth _______ star in the night sky.
A black body curve is the way in which the intensity of radiation emitted by a hot object depends on its _______.
Saturn has been observed in the night sky since ancient times but _______was the first to observe it with a telescope in 1610.
The smallest planet in the solar system?
Saturn has at least 50 moons and_______in total, though only 62 have confirmed orbits and only 53 have been given official names.
The smallest gas giant is?
It is also called the ______ curve.
Terrestrial planets are earth like planets made of ______ or metals with a hard surface.
Jupiter, Saturn, ______ and Neptune are the four Gas Giant Planets.