solarsystem Flashcards
(7 cards)
nebula
a cloud of gas and dust in outer space
solar nebula
The cloud contracted under its own gravity and our proto-sun formed in the hot dense center
nuclear fusion
a nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus
sunspot
are temporary phenomena on the suns photosphere that appear as spots darker than the surrounding areas
terrestrial planets
A terrestrial planet, telluric planet, or rocky planet is a planet that is composed primarily of silicate rocks or metals
prograde rotation
Having a rotational or orbital movement that is the same as most bodies within a celestial system. In our solar system
retrograde rotation
which is counterclockwise when viewed from above the suns north pole