Pluto Dome Open House




Most evenings from dusk to close


Included with General Admission

Take a self-guided tour through the very building where Pluto was discovered!

You can check out the Lawrence Lowell Telescope, a 13” astrograph that was built specifically to aid in the search for Percival Lowell’s fabled ‘Planet X,’ and was eventually used by Clyde Tombaugh to discover Pluto in February of 1930. An educator will be present to answer your questions about the mysterious dwarf planet and its discovery. 

Learn more about the Pluto Discovery Telescope

COVID-19 and General Admission

Test negative* for COVID-19 within 72 hours of visit.
(Ages 12+)
*Lab tests only.

Vaccination accepted in lieu of negative test.
(Ages 12+)

Young children wear masks when indoors.
(Ages 2-11)

Negative test not required for young children.
(Ages 2-11)

Phase 3A

General Admission is back, with new protocols to keep guests and staff safe from COVID-19. We will move to Phase 3B—unrestricted General Admission—as soon as the level of community spread permits it.

See our reopening plan.