astronomy exam practice 2

apparent magnitude (m) is -3 and its absolute magnitude (M) is 3?

b. 10 parsecs

apparent magnitude (m) is 6, and its absolute magnitude (M) is -2

A. farther than 10 parsects

apparent magnitude (m) is 1 and its absolute magnitude (M) is -3

A. farther than 10 parsects

apparent magnitude (m) is 15 and its absolute magnitude (M) is 5

A. farther than 10 parsects

apparent magnitude (m) is 2 and its absolute magnitude (M) is 2

B. 10 parsecs

What spectral class star (of the ones listed) would have its peak wavelength that emits shifted farthest towards the “blue” end of the spectrum?

B. an 05 star

What spectral class star (of the ones listed) would have it’s peak wavelength that emits shifted farthest towards the blue end of the spectrum?

an 05 star

what spectral class star would have its peak wavelength that emits shifted farthest towards the?

a M6 star

which spectral type star would emit the most red light comapred to the other 4 listed

B1

which spectral type would emit the most orange light

B1

which spectral type would emit the most green light

B1

which spectral type would emit the most red light

M7

what color would M4 spectral type star be

red ish

assume you are observing the spectra of two different stars, star A exhibits a dark line shifted by 5nm towards the red end of the spectrum while star B exhibits a dark line shifted by 10nm towards the blue. from this data what other conclusions can you make about these stars

star A is moving away from us and star B is moving towards us, and, star B has a greater radial velocity than star A

the amount that gravity pulls on your mass is known as your

weight

the star represents the head of medusa in the constellation perseus

algol

what is the approximate apparent magnitude of the sun

-26.7

what is the approximate absolute magnitude of the sun

5

the star sirius is also known as

the north star

on magnitude scale every 5 magnitudes is equivelent to __ times in brightness

100

how many stars are farther than a parsec from the sun

billions

approximately how many stars in total have parallaxes greater than 1 arc second using the steller traingulation method

0

which star system of the ones listed has the largest parallex

sirius 9 ly away

whcih star system of the ones listed has the smallest parallex

deneb (1600 ly away)

henrietta leavitt discovered that the longer the period of a cepheid variable the greater its __ was

absolute magnitude

henrietta leavitt period luminosity relation for cepheid variable stars allowed edwin hubble to determine

the distances of these stars

which radiation law allows us to determine the temperatures of stars

wiens

which radiation law allows us to determine the sizes of stars

stefan boltzmann

a certain star has an apparent magnitude of 8. with only this known what else can you determine about that star?

none of the previous are correct

why cant triangulation be used to determine the distances to all stars

some stars have parallaxes which are too small to measure

who was the 1st to discover that other galaxies exsisted

hubble

who 1st developed the steller spectral sequence

connon

the 1st cepheid variable star was found in the constellation of

cepheus

what is the spectral type of the sun

G2

what color would be a K4 spectral type star be

orange-ish

what color would be a F8 spectral type star be

white

what color would an O5 spectral type star be

blueish

the ozone layer in the earth atmosphere mainly protects us from

ultraviolet

what spectral type of star has the lowest surface tempature

K9

what spectral type star has the highest surface tempature

B0

who first realized that the steller spectral sequence represented the different tempatures of the stars also writing a thesis on steller atmosphere that is regarded as the most influencial in the field of astronomy

cecilia payne

which star should be the least common comapred to the others listed in the universe

11.3

which star should be the most common in the universe

0.3 MO

what is the best definition listed for mass

stuff

The most prominent greenhouse gases in our atmosphere are ____ and water vapor

carbon dioxide

The star alpha mensae has an apparent magnitude (m) of 5 and is about just 10 parsecs away. What is its absolute approximate magnitude.

5

The closest stars to the solar system are predominantly ____ Spectral type stars

M

If you had a weight (plate) that said both “22 (kilograms)” and “50 lbs (pounds)”, which of those numbers/units should be removed to make it accurate for any location in the universe

50 pounds

true or false if someone moves a light from 10 feet from you, to 5 feet from you (2 times closer), the light would appear 2 times brighter.

false

even though absolute magnitude (M) are usually not stated for anything other than stars, what would be the approximate absolute magnitude.

a very large positive number