Stars And Galaxies

Question 1

Characteristics used to classify stars include:

Answer 1

Color, temperature, size, composition, and brightness.

Question 2

Absolute magnitude-

Answer 2

Measure of the amount of light a star gives off

Question 3

Apparent magnitude-

Answer 3

Measure of the amount of light relieved on Earth

Question 4

What is a light year?

Answer 4

The distance light travels in one year.

Question 5

How fast does light travel?

Answer 5

300,000km/second or 9.5 trillion kilometers in one year

Question 6

Spectra-

Answer 6

Range of wavelengths

Question 7

Spectroscope-

Answer 7

Instrument used to study the spectra stars emit, Can spread the light into different wavelengths

Question 8

A star is born when…

Answer 8

The contracting dust and gas from a nebula become so dense and hot that a nuclear fusion starts.

Question 9

What 3 things can become of a star after they run outta fuel?

Answer 9

White dwarf, neutron star, black hole.

Question 10

NEBULA-

Answer 10

LARGE CLOUD of dust and things

Question 11

Most stars are members of groups of 2 or more stars called

Answer 11

Star systems

Question 12

Galaxy

Answer 12

Huge group of single stars, star systems, star clusters, dust and gas bound together by gravity

Question 13

4 types of galaxieees

Answer 13

.spiral.
.elliptical.
.irregular.
.quasars.

Question 14

Spiral-

Answer 14

Huge bulge in middle and arms spiral outward

Question 15

Elliptical-

Answer 15

Round or flattened balls, contains only old stars

Question 16

Irregular

Answer 16

No regular shapes, only bright, young stars

Question 17

Quasars

Answer 17

Active young galaxies with black wholes at their centers