Star Classification | Quizlet

our sun is a

yellow star

the temperature of a yellow colored star ranges between ________.

5500-6000K

class m stars are

red

Stars are classified according to temperature using which system of letters (from hottest to coolest)?

O, B, A, F, G, K, M

The horizontal axis of the Hertzsprung-Russell Diagram, represents the _____.

star's surface temperature

Betelgeuse, in the upper left of Orion's belt, is a ____________.

bright, red, fairly cool star

the sun is a K class star with orange color

false

a star's surface temperature is not related to its size

false

Red stars are the hottest and blue are the coolest, in a continuum ranging from 2,000 K to more than 55,000 K.

false

blue stars are the coolest and red stars are the hottest

false

the surface temperature of a star does not determine its color

false

stars are plotted on the Hertzsprung-Russell diagram

true

Orion's Belt consists of stars that are different colors.

true

the explosion of a star is referred to as a _____.

supernova

when a very massive star runs out elements to fuse, it

Collapses and explodes violently in a supernova

Name a supernova remnant that spins and emits radiation in pulses.

pulsar

a neutron star is

Extraordinary dense

After a supernova explosion, a less dense star (<4 times the mass of the Sun) will become a black hole.

false

A white dwarf is a large, white star that is cool in temperature.

false

a supernova can briefly outshine a whole galaxy

true

stars begin their lives in clouds of dust and gas called nebulae

true

a black hole is a remnant of a supernova

true

A neutron star is a stellar remnant which is almost entirely made of neutrons.

true

Black holes or neutron stars are formed from the materials in the core of a supernova.

true

Which of the following best describes the current age of the Sun?

it is about halfway through its lifespan

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