Join Lowell Educators for our once a year, special Pluto tour!

Follow in the footsteps of Clyde Tombaugh on the day of discovery, visit the less known relics of the search for planet X on Mars Hill, and learn what exactly it takes to find Pluto.

Your General Admission pass will get you all-day access to Lowell Observatory.

I Heart Pluto Festival 2023 is an event 93 years in the making! Celebrate the anniversary of Pluto’s discovery on February 18 – 20.

Show your love at the Home of Pluto in snowy Flagstaff, Arizona, where it was discovered by Clyde Tombaugh 93 years ago on February 18, 1930.

This festival will take place at Lowell Observatory with special events throughout the historic city of Flagstaff, Arizona.