Hubble Deep Field Galaxy Estimate

This is one of my favorite exercises in the Astronomy course. One of the goals of the Minnesota's Department of Education is to bring about a set of standards in science education to which every Minnesota high school student can attain. One large area of the science standards is knowing our place in space and getting a proper perspective. Well, the Solar System Scale Model gives you a sense of where Earth is relative to the other planets and the nearest stars. This lab will give you a perspective Earth's larger home as a member of the Milky Way relative to other galaxies in the Universe.

In order to complete this assignment, you need to enter the practice area for the Deep Field galaxy estimate. Please go first to the Deep Field Lab page. When you arrive there, do all of the work on paper with calculator and then return to this site for data input. At that time your can put your calculations and responses into these little boxes that can be easily submitted to me over the internet.

Your Name:

E-mail Address (Required):

1) What is your guess of the number of galaxies in the Universe?


2) What are your estimates of the number of galaxies imaged by each camera?

Camera A

Camera B

Camera C

3) How many galaxies do you estimate were imaged in the Deep Field photo?

4) How many galaxies do you estimate are in the entire Universe?


5) How does your estimate of the number of galaxies in the Universe make you feel when you compare yourself to it?

6) If there are so many galaxies, and if the average number of stars in each galaxy are 150 billion, then there must be a lot stars. Do you think that there might be planets out there in our galaxy or others where the conditions are suitable for life? And why do you say this?

Hopefully, you are now thinking about your significance and also about whether we are alone or not in this vast Universe. You are now ready to look at the subject of Cosmology and then at the possibilities of extraterrestrial life.


When you have completed this quiz and are satisfied with your responses, click on the submit button at the bottom of this page, and then you may move forward to Cosmology or return to Galaxies.or go to the Syllabus .

| Home | Course Information | Assignments | Teacher Bio | Course Units | Syllabus | Links |