Galaxies

Galaxies

By Aguado Angelica

What is a Galaxy?

A huge collection of:

- Gas

- Space Dust

- Millions to trillions of stars and any planets surrounding them

- "Rogue Planets"

Galactic Info

• Galaxies spin, similar to the objects in our solar system

• We don't know how many there are.

• Current estimates are at more than 2 trillion

Spiral Galaxies

• Called this because they appear to form a spiral shape

• Stars are still forming in these types of galaxies

• One of the more common types of galaxies

Elliptical Galaxies

• Seem to be older

• Stars formation is no longer occurring

• Lack dust and gas

• Might be the result of galaxies colliding

Multiple Choice

What type of galaxy is the Milky Way?

• Spiral

• Elliptical

• Irregular

• Transition

Irregular

• Usually smaller

• Believed to form for 2 reasons - too small to form into a structure, or a massive collision caused them to lose their structure

Galaxies in Transition

• Kind of a 4th category for Galaxies

• Weirdly shaped, but with a clear structure

• Normally the result of galaxies colliding

Milky Way Galaxy

• The Galaxy we are within

• Spiral Galaxy

• About 100,000 light years wide

Dark Matter - a Brief Intro

- Something is strange about the spin of many galaxies, going against the laws of Kepler.

- Based on this, it was proposed that a large % of matter within galaxies, including our own, is invisible.

- This matter helps hold galaxies together and effects the movement objects within the galaxy

Multiple Choice

One of the more common types of galaxies which have stars still forming within them are...

• Elliptical

• Spiral

• Irregular

• Transition

Multiple Choice

This type of galaxy is generally considered to be older and is no longer forming stars.

• Spiral

• Irregular

• Elliptical

• Transition Galaxies

Multiple Choice

What type of galaxy is this?

• Spiral
• Elliptical
• Irregular 
• Irrational

Multiple Choice

A flat, disk-shaped galaxy with a central bulge and winding "arms" that extend outward.

• irregular galaxy

• spiral galaxy

• elliptical galaxy

• random galaxy

Multiple Choice

The type of galaxy that is composed of the older stars and low-mass stars.

• Spiral
• Elliptical
• Irregular
• Constellation

Multiple Choice

The most abundant type of galaxy in the universe is an...

• Spiral Galaxy
• Elliptical Galaxy
• Irregular Galaxy