vocab unit 2

Question 1

the apparent magnitude of a star if placed 32.6 light years from the sun

Answer 1

absolute magnitude

Question 2

how bright a star appears to an observer on earth

Answer 2

apparent magnitude

Question 3

the average distance between the earth and the sun 150 km

Answer 3

astronomical unit

Question 4

hydrogen explodes creating universe

Answer 4

big bang theory

Question 5

brightness of a star

Answer 5

luminosity

Question 6

the dense core that remains after a large star explodes

Answer 6

neutron star

Question 7

a star that flared into intense brightness

Answer 7

nova

Question 8

a pulsating star whose distance can be determined from its period of pulsation

Answer 8

cepheid variables

Question 9

stars of an absolute magnitude of +1 or less

Answer 9

dwarf stars

Question 10

two stars of unequal brightness that revolve around and pass in front of each other at regular intervals

Answer 10

eclipsing binary

Question 11

a group of millions or even billions of stars held together by gravity

Answer 11

galaxies

Question 12

the distance a ray of light travels in one year about 9.5 trillion im

Answer 12

light year

Question 13

a large glowing dust cloud that eventually becomes a star

Answer 13

protostars

Question 14

a distant heavenly object that emits rapid pulses of light and radio waves

Answer 14

pulsars

Question 15

very distant radio sources that resemble stars but are larger more bright big

Answer 15

quasars

Question 16

large low density star that is hundreds of times more luminous than a red giant

Answer 16

supergiants

Question 17

large red stars that are cooler and more luminous than blue white stars

Answer 17

red giants

Question 18

intensely bright object caused by the explosion of a massive red giant star

Answer 18

supernova