Creative Commons License Copyright © Michael Richmond. This work is licensed under a Creative Commons License.

Use Stellarium to answer an astronomical question

This project must be done by individuals.

The goal of this project is for you to learn how to use the software package called Stellarium, which allows you to look at the night sky from any point on Earth, on any date, at any time. It can be very useful for figuring out just what IS that bright object in the west after sunset, or making plans for a trip in the future.

Stellarium is free, and runs under Windows, MacOS, and Linux. You can download a copy from

If you don't want to install a copy on your own computer, you can find copies on the computers in the College of Science computer lab, and on the computers out at the RIT Observatory.

In order to receive full credit for this exercise, you must answer both questions below by creating a picture of the night sky at the time in question, and printing that picture onto paper in a printer-friendly manner: invert the color scale first, turning black into white and vice versa.

So, do NOT print out a picture like this:

but instead, DO print out a picture like this:

Here are the two questions you must answer:

  1. During this past summer, the planet Mars grew very bright as the Earth caught up to it and passed it in its orbit. I remember one night when, just at midnight, I could see Mars about 20 degrees above the southern horizon, sitting halfway between Saturn and the Moon.

    What night was that? Make a screenshot showing the sky.

  2. Another celestial event that took place this summer was the lunar eclipse.
    1. Look up the date and time of the eclipse. When was it?
    2. Could we see this event from Rochester at the middle of the eclipse? (don't bother with a screenshot for this, just use words)
    3. What was the best place on Earth from which to view this eclipse? In other words, from which location was the Moon directly overhead at the moment of totality? Make a screenshot showing the sky from this location at this time.

Creative Commons License Copyright © Michael Richmond. This work is licensed under a Creative Commons License.