Astronomy 101

Created by mamiller3 

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27 terms

We see a planetary nebula when

A star finishes its Red Giant Stage

Stars are formed

from collapse and fragmentation of molecular clouds.

A red giant may be producing energy via

Helium-carbon fusion

A pulsar is a type of

neutron star

Whether a star ends up as a black hole, neutron star, or white dwarf
depends on its final

mass

The evidence to date for the existence of black holes relies on

GRAVITATIONAL EFFECTS ON SURROUNDING OBJECTS.

We believe the Milky Way to be a spiral galaxy, based on

THE OVERALL FLAT SHAPE AND ROTATION OF THE MILKY WAY.

Early attempts to estimate the size of the Milky Way were defeated by

INTERSTELLAR ABSORPTION BY DUST.

Our location in the Milky Way is best described as

IN AN OUTER SPIRAL ARM

Stars of population I are most easily found

IN THE DISK

Very detailed observations of distant galaxies show that

THERE WERE ONCE MANY MORE SPIRALS IN CLUSTERS THAN WE NOW SEE

A "typical" galaxy is

DIM AND PART OF A GROUPING.

Clusters of galaxies contain a substantial amount of

HOT GAS AT A FEW MILLION DEGREES

To detect mass, you have to use

gravity

Every galaxy has a

super massive black hole

Cynus X-1

nailed the existence of blackholes

Light and dark areas in the Milky Way are caused by

dust grains

Globular clusters concentrated in

the constellation Sagittarius.

Type 1 Stars

Brightest stars are blue (young populations), make up the spiral arms.

Type 2 Stars

Brightest stars are red, older, globular clusters, bulge plus halo. When population 2 stars formed, the galaxy was round.

Cosmic Rays are caused by

supernova explosions

As you move from ellipticals to spirals,

cold gas forms new star formations.

Dust and clouds settle in the _______ part of a galaxy

flat disk

Older stars settle in the ______ of a galaxy

bulge

The Whirlpool Galaxy

first galaxy to show that there were spirals.

Winding arms of a galaxy are often caused by

the gravity of a neighboring galaxy.

Dark Matter does not emit

detectable radiation

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