KELSEYVILLE, Calif. – The Taylor Observatory will host its next “Window to the Universe” who on Saturday, June 29.

The event will take place from 8 to 11 p.m.

At 8 p.m., Bill Haddon, president of the Friends of the Taylor Observatory, will give a talk titled, “What’s Up at Taylor Observatory?”

Tim Gill of Kelseyville Unified will speak at 8:10 a.m. on celestial navigation.

Have you ever wondered how navigators knew where they were and in which direction they should go before the invention of global positioning system, or GPS, satellites?

Gill will investigate how ancient mariners and land-based explorers used the position of celestial objects (sun, moon, planets, and stars) to navigate from one place to another.

Through tales of heroic adventurers and demonstrations of pre-GPS observation tools, attendees will gain a new appreciation for celestial objects and the role they played in our understanding of the geography of the Earth.

Gill brings both knowledge and light-heartedness to this interesting topic. A math teacher and student services director for the Kelseyville Unified School District, Gill works yearly with students in Australia as a break from his multiple school district responsibilities.

At 9 p.m., Eduardo Alatorre will lead the full dome show and the June night sky telescope viewing from 9:30 to 11 p.m. on the Nieman Star Deck.

Jupiter, positioned near opposition, should be a spectacular telescope target on Saturday night and will be a featured observational goal.

Admission is $5 for adults and is free to Lake County students from kindergarten through 12th grade. Additional donations support Lake County STEM education.

Taylor Observatory is located at 5725 Oak Hills Lane, Kelseyville, telephone 707-262-4121.

Visit Friends of Taylor Observatory on Facebook.