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PLANETARIUM SHOWTIMES Laser Light Nights Pub Night Under the Stars Wine and Cheese Under the Stars Yoga Under the Stars Planet Passport Series Interplanetary 5K Race Community Solar System Unnamed Comet Locations Outreach Rucker Family Science Teacher Program Planetarium Newsletter Infinite Wonder Podcast Museum Conversations | Henry Diltz: Legendary Rock Photographer -SOLD OUT Museum Conversations: Christopher Marley American Animation: Art on Screen SENIOR DAY Senior Morning FREE DAYS Bradley FUSE Interactive Experience 2026 Engineering Day 2026 Virtual Programming Objectively Speaking | The Young Collectors Hands-on at Home | Fun Art + Science Projects Virtual Science Demos All Events - Listing Field Trips | Outreach Programs Every Student Initiative ESI Student + Family Museum Fun Pass Recurring Programs Chemistry Demonstrations with Bradley University's Chemistry Club Science Treasure Hunt I Hear America Singing- Both shows SOLD OUT Newsletter Sign-up Join | Renew Membership Member Appreciation Day Membership FAQ Digital Membership Card Reciprocal Programs Member Saturdays Member Saturday | FUSE Every Student Initiative Visionary Society Matching Gifts Corporate Members Peoria Falcon Circle Every Student Initiative State of the Museum 2025 Fundraising Events 4th of July Backyard BBQ- Tickets go on sale May, 2026 Membership Swap Weekend Nita Sunderland Tribute Volunteer Opportunities Board of Directors Foundation Board of Directors Museum Staff President & CEO John Morris Every Student Initiative Our Story Partners Blue Star Museum Museums for All Leed Gold Certification Accessibility in the Museum Peoples Choice Awards Museum News Donation Requests Volunteer Opportunities Employment Dome Planetarium Community Solar System Dome Planetarium Meet the World's Most Advanced Planetarium System! PLANETARIUM SHOWTIMES Laser Light Nights Pub Night Under the Stars Wine and Cheese Under the Stars Yoga Under the Stars Planet Passport Series Interplanetary 5K Race Community Solar System Unnamed Comet Locations Outreach Rucker Family Science Teacher Program Planetarium Newsletter Infinite Wonder Podcast Community Solar System Peoria Riverfront Museum Central Illinois Community Solar System Peoria Riverfront Museum's Community Solar System model is the world's most complete large-scale model of the Solar System. The scale factor is 99,000,000:1, covering 6,000 square miles of Central Illinois. In addition to the Sun and 8 planets, the model includes 5 dwarf planets and numerous unnamed comets spread across the globe. Click here to see a list of cities home to unnamed comets. The Sun is the center of the model, and is depicted on Riverfront Museum's Sun Plaza (and the wall of Dome Planetarium lobby). The Earth (5 inches in diameter) is nearly one mile from the Museum on the Rock Island/Pimiteoui Trail at the Peoria riverfront. The 3 stars of the Alpha Centauri system (the closest stars to the Sun) are represented by Little West Crater at the Apollo 11 landing site - they could be lined up across the 100’ crater, accurate for both their size and distance to the scale of the model. SEE THE MODEL ON GOOGLE MAPS The Sun (46 feet in diameter) is located on Riverfront Museum's Sun Plaza. The real Sun is actually 865,000 miles in diameter. Mercury (1.93 inches in diameter) is located along the Rock Island/Pimiteoui Trail near the Riverplex Playground, about 0.36 miles from the Museum. The planet Mercury is actually 3,032 miles in diameter, and 36,000,000 miles from the Sun. Venus (4.8 inches in diameter) is located along the Rock Island/Pimiteoui Trail near the the volleyball courts, about 0.68 miles from the Museum. The planet Venus is actually 7,521 miles in diameter, and 67,200,000 miles from the Sun. Earth (5 inches in diameter) is located along the Rock Island/Pimiteoui Trail in Constitution Park, about 0.94 miles from the Museum. The planet Earth is actually 7,926 miles in diameter, and 93,000,000 miles from the Sun. Mars (2.7 inches in diameter) is located along the Rock Island/Pimiteoui Trail in Detweiller Marina Park Playground, about 1.4 miles from the Museum. The planet Mars is actually 4,221 miles in diameter, and 141,600,000 miles from the Sun. Ceres (0.4 inches in diameter) is located at the Bonnie W. Noble Center for Park District Administration, at Lakeview Park, about 2.6 miles from the Museum. The dwarf planet Ceres is actually 600 miles in diameter, and about 260,000,000 miles from the Sun. Jupiter (55 inches in diameter) is located in the Peoria International Airport lobby, about 4.9 miles from the Museum. The planet Jupiter is actually 88,846 miles in diameter, and 483,800,000 miles from the Sun. Saturn (46 inches in diameter) is located in Pekin Public Library (301 S. 4th St. Pekin 61554), about 8.9 miles from the Museum. The planet Saturn is actually 74,897 miles in diameter, and 890,800,000 miles from the Sun. Uranus (18 inches in diameter) is located in Troutman Park in Princeville, about 16 miles from the Museum. The planet Uranus is actually 31,763 miles in diameter, and 1,784,800,000 miles from the Sun. Neptune (18 inches in diameter) is located at the Wyoming Train Depot along the Rock Island Trail State Park, about 28 miles from the Museum. The planet Neptune is actually 30,775 miles in diameter, and 2,793,100,000 miles from the Sun. Pluto (0.9 inches in diameter) is located at Good’s Furniture (Rt 78 & 34, Kewanee), about 40 miles from the Museum. The dwarf planet Pluto is actually 1,485 miles in diameter, and 3,647,200,000 miles from the Sun. Haumea (0.7 x 0.4 inches in diameter) is located at the Children’s Discovery Museum (101 E. Beaufort, Normal, IL 61761), about 41 miles from the Museum. The dwarf planet Haumea is actually 1,218 x 619 miles in diameter (ellipsoidal), and 4,025,000,000 miles from the Sun. Makemake (0.6 inches in diameter) is located at the Discovery Depot (128 S Chambers St., Galesburg, IL 61401), about 43 miles from the Museum. The dwarf planet Makemake's size is undetermined, but is probably 808-1,181 miles in diameter, and 4,257,400,000 miles from the Sun. Eris (0.9 inches in diameter) is located at Western Illinois University (near room 135 of Knoblauch Hall, 1 University Circle, Macomb), about 62 miles from the Museum. The dwarf planet Eris is actually 1,491miles in diameter, and 6,293,100,000 miles from the Sun. The Alpha Centauri Star System (closest star to the Sun), could be located at the Little West Crater, the Apollo 11 landing site on the Moon, about 238,900 miles from the Museum. The three stars could line up across the 100 foot crater. Alpha Centauri A would be 59 feet in diameter, Alpha Centauri B would be 39 feet in diameter, and Alpha Centauri C would be 6 feet in diameter. The actual stars in Alpha Centauri are 1,112,000, 741,000, and 124,000 miles in diameter, and about 4.3 light years from the Sun. Have fun exploring the Peoria Solar System!