Galaxies End of Week 2022

Which of the following IS NOT one of the four basic types of galaxies in our known Universe?

• Spiral galaxies

• Barred Spiral Galaxies

• Elliptical Galaxies

• Irregular galaxies

• Bright Reflection galaxies

We live in a galactic cluster called the _______________, which contains at least ______ galaxies.

• Andromeda, one billion

• Local Group, 30

• Pegasus, 150

• the Milky Way, one trillion

What is the other large galaxy in our local group other than the Milky Way?

• Orion and the Horsehead

• Andromeda

• Alpha Centauri

• Sagittarius A

A galaxy is a large collection of stars, gas and dust. What is responsible for holding the stars, gas, and dust together in a galaxy?

• heat
• light
• gravity
• friction

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

There is a super massive black hole in the center of most galaxies. 

• True
• False

What is dark matter?

• Light

• Invisible life

• Matter that emits no light at any wavelength

• Stars dust

How do we know dark matter exists

• We took a picture in 2019

• We use other types of the electromagnetic spectrum

• We find accretion disks

• We don't, it is needed to make gravity in galaxies work

Tags

NGSS.HS-PS2-4

What is a cluster of clusters called?

• galaxy

• Supercluster

• Local Group

• White Dwarf

Why are there different types of galaxies?

• They collide

• They evolve

• They age and mature

• We don't know

How close are galaxies?

• Really far away

• Really close together

• depends on the galaxies

• Both really far away and really close. It depends on your perspective