The planets all lie in nearly the same plane resulting in a disk-like structure for the solar system. this disk-like structure is believed to exist because: "planetesimals formed in the plane of rotation of the solar nebula."
Planetesimals are solid objects that are believed to occur in protoplanetary and debris disks.
They are thought to arise from cosmic dust grains, according to the Chamberlin-Moulton planetesimal hypothesis.
They are thought to have originated in the Solar System around 4.6 billion years ago and contribute in the study of its genesis.
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Full Question:
The planets all lie in nearly the same plane resulting in a disk-like structure for the solar system. This disk-like structure is believed to exist because:
A. the bipolar flow from the young sun cleared all material out of the nebula except that in the disk.
B. the sun's magnetic field slowed down the rotation of the solar nebula.
C. planetesimals formed in the plane of rotation of the solar nebula.
D. Jupiter's gravity was great enough to pull all of the other planets to the plane of its orbit.
