Messier Objects Distances Plot

1) Fill in the table below using the Messier data in the SEDS catalog. Use the following breakdown of the objects placing them into the categories listed.

cat1 - gas clouds, planetary nebula, asterisms, Milky Way patch

cat 2 - globular clusters

cat3 - open star clusters

cat4 - open clusters

cat5 - galaxy


Messier number
distance in kly                      
Messier description                                                                       
Category
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2) Plot the Messier object distances in the semi-log plot. Use different symbols for each of the categories or use the category numbers themselves in the plot.


3) What details of the plot strike you as especially pertinent? Remember the semi-log plot extends over 6 orders of magnitude.