Monthly Start Chart

October evening skies over Hawai‘i

October 2020

Mars is at opposition on the 13th shining brightly at magnitude -2.6. Jupiter moves to the western sky in the evening at magnitude -2.4, about the same as Mars. The striking difference in color between Mars and Jupiter is evident. Nearby Saturn moves to just 3 degrees east of Jupiter by the end of the month. Uranus, in Aries, reaches opposition on the 31st at mag. 5.7. On October 21, the Earth crosses the orbit of Comet 1P/Halley, producing the Orionids meteor shower as the Earth impacts bits of dust shed by the comet.

Monthly Moon Phase Calendar

Making Your Own Star Charts


This star chart is produced using the Cartes du Ciel Sky Charts program written by Patrick Chevalley.

This free program runs on Windows and Macintosh computers. If you are interested in making your own star charts for use at home or school, you may obtain a copy of the program and its documentation from this website.

This program is very powerful and can be used to generate star charts far more detailed than the one provided here.

Institute for Astronomy

We are one of the largest university astronomy programs in the world.