...visible disc? a.x-ray images of other galaxies discs from Chandra
b.the rotation curve of the outermost portions of the disc
c.the orbits of the open clusters in the disc
d.infrared observations of distant brown dwarfs
e.21-cm maps of the spiral arms
Between us and the Galactic Center, the Milky Way has a mass of
a.over a trillion suns
b.250 million suns
c.100 billion suns
d.one to two million suns
e.several hundred thousand suns.
What statement is true?
a.Population I stars lie outside the galactic disc
b.Population II stars probably have terrestrail planets around them.
c.the bright blue stars that dominate the sky are Population I stars
d.our sun is a population II star
e.Population I stars are the brightest stars in the globular clusters.
b.the rotation curve of the outermost portions of the disc
c.the orbits of the open clusters in the disc
d.infrared observations of distant brown dwarfs
e.21-cm maps of the spiral arms
Between us and the Galactic Center, the Milky Way has a mass of
a.over a trillion suns
b.250 million suns
c.100 billion suns
d.one to two million suns
e.several hundred thousand suns.
What statement is true?
a.Population I stars lie outside the galactic disc
b.Population II stars probably have terrestrail planets around them.
c.the bright blue stars that dominate the sky are Population I stars
d.our sun is a population II star
e.Population I stars are the brightest stars in the globular clusters.