On Tuesday morning, the moon appeared at the far "right" of a Mars-Saturn-Jupiter string. (Photo by Joe Guzman)

Here’s a reason to set the alarm clock to “ridiculously early” this week: The moon will align with three bright morning planets — Mars, Saturn and Jupiter — in the pre-dawn hours.

Joe Guzman, aka the "Chicago Astronomer," illustrates the progression of the planet-moon conjunction. (Joe Guzman)

Joe Guzman, aka the "Chicago Astronomer," illustrates the progression of the planet-moon conjunction. (Joe Guzman)

Joe Guzman, aka the "Chicago Astronomer," illustrates the progression of the planet-moon conjunction. (Joe Guzman)

Joe Guzman, aka the "Chicago Astronomer," illustrates the progression of the planet-moon conjunction. (Joe Guzman)

Joe Guzman, aka the "Chicago Astronomer," illustrates the progression of the planet-moon conjunction. (Joe Guzman)

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