Astronomy

A star like our sun, which is about average in brightness and temperature, belongs to this group?

• giant

• main sequence

• supergiant

• dwarf

Which is evidence for the big bang?

• Red shift of galaxies

• background cosmic radiation

• Slowing down of fusion rates

• All of these

The core of a star which collapses in on itself and has such strong gravity that not even light can escape

• white dwarf

• magnetar

• neutron star

• black hole

A great cloud of gas and dust

• nebula

• nova

• planetary nova

• protostar

Stars which are not fully formed stars. They do not have high fusion rates and are not fully functioning as stars

• white dwarf

• black hole

• protostar

• nova

This law explains the relationship between red-shift and distance we are from galaxies

• Keplers Law

• Einsteins Law of Gravity

• Hubbles Law

• Big Bang Theory

A main sequence star can end it's life cycle as a ___________?

• black hole

• neutron star

• red giant

• white dwarf

The brightness (or luminosity) of a star can depend on its temperature and what other factor?

• size

• color

• distance from us

• reflectance

What two variables did you use in your gizmo to determine the actual distance we are from a star

• luminosity and size

• luminosity and brightness

• color and luminosity

• redshift and luminosity

Should a star move toward us, how would its spectra change?

• it would red-shift

• it would not change

• it would blue-shift

• it would not produce a spectrum