solarsystem Flashcards

(7 cards)

1
Q

nebula

A

a cloud of gas and dust in outer space

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2
Q

solar nebula

A

The cloud contracted under its own gravity and our proto-sun formed in the hot dense center

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3
Q

nuclear fusion

A

a nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus

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4
Q

sunspot

A

are temporary phenomena on the suns photosphere that appear as spots darker than the surrounding areas

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5
Q

terrestrial planets

A

A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals

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6
Q

prograde rotation

A

Having a rotational or orbital movement that is the same as most bodies within a celestial system. In our solar system

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7
Q

retrograde rotation

A

which is counterclockwise when viewed from above the suns north pole

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