Milky Way & Other Galaxies Flashcards
A collection of stars, dust and gas bound together by gravity
Galaxy
A small collection of nearby galaxies bound together by gravity
Group
A small collection of nearby groups of galaxies bound together by gravity
Cluster
A collection of clusters of galaxies (or large collection of nearby galaxies)
Supercluster
Gravity holds our sun in orbit around?
Black hole at the center of the Galaxy
Gravity holds our galaxy in orbit around?
Supermassive black hole at the center of our local group
Gravity holds our local group in orbit around?
No particular point, but attracted to other groups of galaxies
Nucleus is very dense with old stars
Spiral arms, bluish, younger stars
Spiral galaxy
No arms, reddish, older stars
Barred-line in the middle
Elliptical Galaxy
Most dwarf galaxies or nebular clouds
Young or old
Irregular Galaxy
Large cloud of interstellar matter that forms galaxies, stars are born
Nebulae
Oldest objects in the universe, too far to know for sure but probably infant galaxies from the early universe
Quasar
Gravity holds the moon in orbit around our planet
At the center of its orbital path
Gravity holds the planets in orbit around the sun
At the center of its orbital path
Hierarchy
Putting things in order by quality
