Stars
More Stars
Stars, Stars, Stars*
The Sun
Galaxies and the Universe
100

A group of stars close enough to be held together by gravity and have the same proper motion

star cluster

100

This diagram shows the relationship between temperature and absolute magnitude of a star

Hertzsprung - Russel Diagrqm

100
Hot stars are ______________________ (two colors)
blue and white
100

As our sun ages the amount of this element will increase

helium

100

Galaxies that are not spiral or elliptical in shape are called this

Irregular galaxies

200

Stars are classified this way

color, size and absolute brightness (luminosity)

200

This is a massive cloud of gas and dust from which a star may form via gravity

nebula

200
Relatively cool stars are _____________ (two colors)
red and orange
200

 This does not affect the apparent brightness of a star

 How old the star is

200
The Milky Way is a ___________ galaxy (what type)
spiral
300
Patterns of stars in the night sky are called __________________
constellations
300

This varies with the position from which a star is observed

apparent brightness

300

A collapsed star that is so dense that its gravity prevents even light from escaping

Black hole

300
Stars that are the same temperature as the Sun are ________________
yellow
300
Earth and the solar system are in a galaxy called the ______________________.
Milky Way
400

The portion of a star between the core and the outer layer and corona is

radiation zone

400

When massive stars run out of fuel and succumb to their own gravity, they become on of these

supernovas

400

An immense star with significantly more mass than our sun.

Supergiant

400

What is the orbital shape of the planets in our solar system around the sun?

Elliptical

400

Name the three types of large galaxies.

spiral, elliptical, and irregular

500

Stars spend 90% of their lives in this stage

Main sequence

500
The apparent shift in the position of an object when viewed from two different positions is known as ________________.
parallax
500
A white dwarf that gains matter from a companion star and creates a nuclear explosion on its surface

Nova

500

A stream of electrically charged particles sent into space by the sun

Solar wind

500

The ____________________________ states that the universe probably began about 13.7 billion years ago with an enormous explosion.

Big Bang Theory

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