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The graphic below color codes each of the four brightest planets that are consistently the best planets to view through a telescope. Use this chart to aid your events or general observing windows. These are the dates I’m following for my own sidewalk astronomy with some minor fluctuations depending on my current location.
With the exception of Mars, the START DATE of viewing is when the planet reaches 10-degrees above the horizon about one hour after rising. The START DATE of Mars is its OPPOSITION (when Earth passes Mars in orbit). I typically host an “Opposition of Mars” star party on that date, roughly every two years.
Please keep in mind that your local conditions and viewing horizon may impact these dates.
Feel free to download this graphic for printing and sharing.
