A picture of a galaxy is shown below. What type of galaxy is it?
What do galaxies have that nebulas don't?
What would be the most like a main sequence star?
a 5th grade student
a very old person
More of what type of galaxies live in our Milky Way neighborhood?
"Long after our own plain yellow sun expands to become a [blank] and turns Earth into a sizzling hot wasteland, there are still regions in our solar system - and other solar systems as well - where life might thrive."