Astronomy retake

Where is the sun located in our galaxy?

in one of the spiral arms of the Milky Way

What are the three components of the Milky Way Galaxy?

Disk, Bulge, Halo

What is found between stars?

Interstellar matter

Pop 1

young, blue, disk, circular in disk, high heavy element content

Pop 2

old, red, bulge & Halo, plunging through disk, low heavy element content 

Where in our galaxy would you look to find red stars?

In the bulge

where in our galaxy would you look to find blue stars?

In the arms

Open clusters

Smaller, Found in disc, “The Pleiades”

Globular clusters

Large, Found In bulge/Halo, “ Omega Centauri”

What evidence do we have that dark matter Exists?

Galaxy rotation curves ( Stars, moving faster than they should on the outside of a galaxy)

Gravitational lensing (Light from distant galaxies is bent when it passes through a large collection of dark matter)

What is the future of the Milky Way?

We will collide with Andromeda and interstellar matter will become locked up in Stars

Spiral galaxies

Have a central bulge large with a flattened surrounding disc with spiral arms

Elliptical galaxies

Have a semi spherical or elliptical shape

Irregular galaxies

Lack structure and organized shape

Active Galaxy

Emits a lot of radiation/Energy from their core

S0

Have disk systems with the arms of interstellar Matter( Spiral without a spiral)

Hubble’s law tells us…

The distance to a galaxy

What happens when galaxies collide?

change in shape, Type of galaxy, Amount of ISM, Star formation

How do collisions influence galaxies?

Can change types and star formations

What is located at the center of the Milky Way? How do we know?

A super massive Black hole, Star orbital speed, See nothing at the very center

What is the general characteristic Of the three types of active galaxies?

Galaxy that emits a lot of radiation/energy from their core

What is gravitational lensing?

When light from distant galaxies is bent when it passes through a large collection of dark matter

What is the local group?

The cluster of galaxies we belong in

Put the following in order: Filament, Star, Cluster, Galaxy, Super cluster

Star, Galaxy, cluster, super cluster, filament

What type of galaxies are on the arm of the tuning fork?

Ellipticals

What type of galaxies are on the two legs of the tuning fork?

Spirals