Module 1, Assignment 2

What is the largest value you can find within the image of the sun? Let’s call these “Data Numbers” or DN value.

Comment on what you estimate is your measurement accuracy. How many significant figures are meaningful? (In other words, can you measure the diameter to an accuracy of one pixel? One tenth of a pixel? One hundredth of a pixel? None of these?)

How much fainter in DN units is the sunspot than its surroundings?

Repeat your measurement of the Sun’s diameter several times and post your average value of the diameter in kilometers on the Blog. Include a comment about sig figs.

On the Blog describe the general nature of the Sun’s surface around the location of this sunspot.What is the largest value you can find within the image of the sun? Let’s call these “Data Numbers” or DN value.

Comment on what you estimate is your measurement accuracy. How many significant figures are meaningful? (In other words, can you measure the diameter to an accuracy of one pixel? One tenth of a pixel? One hundredth of a pixel? None of these?)

How much fainter in DN units is the sunspot than its surroundings?

Repeat your measurement of the Sun’s diameter several times and post your average value of the diameter in kilometers on the Blog. Include a comment about sig figs.

On the Blog describe the general nature of the Sun’s surface around the location of this sunspot.