*All guests wearing science themed Halloween costumes will receive free admission! Freaky Physics: 6, 7, and 8 p.m. – Join our mad scientists in conducting wild experiments! Scary Space: 6 and 8 p.m. – Learn about the scary science, harsh realities, and the ominous truths behind space travel in our universe. Haunted Observatory Tours*: 5, 6, 7, and 8 p.m. – From haunted telescopes to Percival Lowell’s tomb, you can experience some of the spookier history of Lowell Observatory on our guided Haunted Observatory tours! Tours visit multiple sites so you may learn about some of the lesser known, creepier history of the observatory, hear our ghost stories, and perhaps even see some of your own! Cosmic Zoom: 5 and 7 p.m. Sky Tonight: 6 and 8 p.m. Telescope Viewing: Dark – 10 p.m. *Halloween tours will last one hour. Two tours will be running each hour.