The ________, which is thought to be the source for long- period comets, may also exist at a distance roughly a thousand times further than the heliosphere.
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Kuiper
Astronomers generally accept about nine objects as dwarf planets: the asteroid Ceres, the ________- belt objects Pluto, Orcus, Haumea, Quaoar and Makemake, the scattered- disk objects Gonggong and Eris, and Sedna.
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Solar System
The ________ is located 26, 000 light- years from the center of the Milky Way galaxy in the Orion Arm, which contains most of the visible stars in the night sky.
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asteroid belt
The ________, which lies between the orbits of Mars and Jupiter, contains objects composed of rock, metal and ice.
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Solar System c
The ________] is the gravitationally bound system of the Sun and the objects that orbit it.
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solar wind
The ________, a stream of charged particles flowing outwards from the Sun, creates a bubble- like region of interplanetary medium in the interstellar medium known as the heliosphere.
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interstellar medium
The heliopause is the point at which pressure from the solar wind is equal to the opposing pressure of the ________; it extends out to the edge of the scattered disc.
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Astronomers generally accept about nine objects as dwarf planets
the asteroid Ceres, the Kuiper-belt objects Pluto, Orcus, Haumea, Quaoar and Makemake, the scattered-disk objects Gonggong and Eris, and Sedna
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