A circular but relatively flat portion of the galaxy
The first portion of the galaxy to form
A tightly packed group of a few hundred thousand very old stars
Stands out in a photo of galaxy because it shines brightly with light from massive young stars and glowing clouds of gas and dust.
Our Milky Way is a
Stars orbiting in the _____ near the galaxies center can have orbits highly inclined to the galactic plane
Where are large dust clouds predominantly located in the galaxy M51?
Within or on the edges of the spiral arms
Where are the ionization nebulae predominantly located in the galaxy M51?
within or on the edges of the spiral arms of the galaxy
Why are the ionization nebulae so bright?
They are regions where gas is ionized by hot, young stars.
Disk Stars (Yellow)
All stars orbit in nearly the same plane
Halo Stars (Green)
Orbit can be inclined at any angle
small abundance of heavy elements
Listed following are several locations in the Milky Way Galaxy. Rank these locations based on their distance from the center of the Milky Way Galaxy, from farthest to closest.
A globular cluster in the out skirts of the halo
a cloud of gas and dust in the out skirts of the disk
our solar system
the edge of the central bulge
Imagine a photon of light traveling the different paths in the Milky Way described in the following list. Rank the paths based on how much time the photon takes to complete each journey, from longest to shortest.
Across the diameter of the galactic halo.
Across the diameter of the galactic disk
from the sun to the center of the galaxy
across the diameter of the central bulge
through the disk from top to bottom.
There is a great deal of gas and many stars orbiting around the tiny central source known as Sgr A*, which must be a very massive object to hold so much material in orbit around it
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