What is causing the universe to expand faster and faster? That question will take center stage during a free Star Party at Western Nevada College's Jack C. Davis Observatory on Saturday evening.

Jack C. Davis Observatory Director Dr. Thomas Herring will present an engaging discussion on dark energy, one of the greatest mysteries in modern astronomy and physics. The presentation will examine the evidence behind the accelerating expansion of the universe and why scientists continue to investigate the unseen force believed to be driving it.

“I'll provide some history about looking at the universe, how the idea of an expanding universe came about, the measurements that won a Nobel Prize and convinced physicists that dark energy exists at all, and why we continue to question the fate of the universe,” Dr. Herring said. “The main spoiler is that the word 'dark' is physics code for we don't really know or understand but think there's something to investigate.”

The educational presentation will be followed by telescope viewing opportunities, weather permitting. With clear skies expected, visitors will have the chance to observe Jupiter and Venus through the observatory's powerful telescopes, along with several globular clusters and distant galaxies visible during the summer season.

“There are quite a few good globular clusters and a few galaxies that provide nice views this time of year as well,” said Dr. Herring, referencing the enormous number of stars (some as old as 13 billion years) compacted by gravity.

Adding to the excitement, Dr. Herring and an observatory volunteer will be watching for an exoplanet transit occurring late Saturday night into Sunday morning. During a transit, a planet passes in front of its host star, creating a slight dimming that astronomers can detect and study.

Western Nevada College President Dr. J. Kyle Dalpe encouraged community members of all ages to attend.

"One of the great joys of the Jack C. Davis Observatory is its ability to make complex scientific concepts accessible and exciting for the public," President Dalpe said. "Whether attendees are lifelong astronomy enthusiasts or simply curious about the universe, this Star Party offers a unique opportunity to learn about one of science's biggest mysteries while experiencing the wonder of the night sky firsthand."

The Star Party is free and open to the public. Doors open at 6:30 p.m.

The Jack C. Davis Observatory is located at 2269 Vanpatten Ave. on the northern end of Western Nevada College's Carson City campus.