The Universe, Galaxies, and Stars

Front

What is a major difference in the composition of elliptical and spiral galaxies?

Back

Elliptical galaxies have almost no gas or dust between stars.

Front

A supernova is the explosion of a dying:

Back

high-mass star

Front

According to Hubble's law, the farther away a galaxy is:

Back

the faster it is moving away from us

Front

What type of star is the Sun? Options: Red giant, White dwarf, Red supergiant, Main sequence

Back

Main sequence

Front

The HR diagram classifies stars based on their surface temperature and their: color, diameter, distance from Earth, absolute brightness

Back

absolute brightness

Front

What determines if a star becomes a white dwarf, neutron star, or a black hole? Options: Its age, Its mass, Its brightness, Its temperature

Back

Its mass

Front

What color are the coolest stars?

Back

red

Front

The Milky Way is what type of galaxy?

Back

Spiral

Front

What is the distance between wave crests?

Back

Wavelength

Front

What is a light-year?

Back

distance light travels in one year