Stars and Galaxies

What color are the coolest stars?

• orange

• blue

• white

• red

What is apparent magnitude?

• the brightness of star as it appears from Earth

• the true brightness of a star

• the brightness of the moon as it appears from Earth

• the numerical size of a star

Why do stars appear to move in the night sky?

• the sky is rotating

• the earth is rotating

• the galaxies are moving

• it doesn't appear to move, man, it's actually moving

A large, bright star whose hot core has used most of its hydrogen is a ________________.

• supernova

• nova

• pulsar

• red giant (giant)

Which marks the beginning of a star?

• nuclear fusion ends

• nuclear fisson begins

• nuclear fusion begins

• big bang

A star moving away from earth has a spectrum that is shifted towards _____________.

• red

• blue

• yellow

• itself

About how many stars are visible from Earth without a telescope?

• 10 billion

• 1 millionbegillionthousandtrillion

• 1 million

• 6000

How do scientists determine the composition and temperature of stars?

• Flying to the star and getting a sample

• putting a rover on the surface of a star

• magnetic testing

• analyzing the spectra of the light that star emits

A small, hot, extremely dense core left after a star collapses is a ____________ _______________.

• Red Giant

• White dwarf

• Red Dwarf

• Grumpy, from snow white and the 7 Dwarfs

During the main sequence stage, how is energy generated in a star's core?

• Carbon fuses into oxygen

• Helium fuses into Hydrogen

• Hydrogen fuses into helium

• Blahzium turns into a whole lot of dumbranium