Astronomy Quiz #2

Sun Composition

73% Hydrogen, 25% helium, 2% other

Sun Structure

Chromosphere, Photosphere and Corona

Chromosphere

The outermost layer of the sun, usually able to be seen during total solar eclipses

Photosphere

sun becomes opaque and marks the area of the sun we can’t see past

Corona

The middle core of the sun, the hottest part

Nuclear Fusion

two nuclei form a bigger nucleus

Proton-Proton Chain

nuclei of hydrogen are built up into nuclei of helium

Radiation

emission of energy as an electromagnetic waves or photons

Convection

movement caused within a gas or liquid by the tendency of hotter and less dense materials

Conduction

heat is transmitted through a substance when there are different temps from a collision.

Accretion Disk

a rotating disk of gas, dust or plasma that slowly loses momentum

Stellar Association

lose unbounding group of young stars

Black Hole

Star - Collapses in on its own weight - compacts so once inside you can’t escape nothing gets out

Chandrasekhar limit

Maximum mass of a stable white dwarf

Clump

clump of stars

Coronal Mass Ejection

Large expulsions of plasma and magnetic fields from the suns corona