solarsystem Flashcards
(7 cards)
1
Q
nebula
A
a cloud of gas and dust in outer space
2
Q
solar nebula
A
The cloud contracted under its own gravity and our proto-sun formed in the hot dense center
3
Q
nuclear fusion
A
a nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus
4
Q
sunspot
A
are temporary phenomena on the suns photosphere that appear as spots darker than the surrounding areas
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
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
7
Q
retrograde rotation
A
which is counterclockwise when viewed from above the suns north pole
