STATISTICIAN STAGES:

 
 
 
 
 
 
 
 
 

Before beginning, get this activity's HAL (PDF, 235 KB) or get the full HAL (PDF, 355 KB) for the whole HDF lesson.

One of the first questions to be asked

Upon studying the Hubble Deep Field image, one of the first questions asked by astronomers and students is: "How many objects are there?" Scientists often develop rough estimates, which they verify later with further investigation. We would like you to do the same.

In the space provided below, type your preliminary estimate of the number of objects in the Hubble Deep Field (HDF).

Your preliminary estimate of the number of objects in the HDF

As scientists gather more data, their estimates become more accurate. You will now begin a data-collection procedure astronomers used on the HDF to make more accurate estimates of the number of objects in the field.