Skip to main content
You are the owner of this article.
You have permission to edit this article.
Steward Observatory to host free lecture on dark matter in Spanish

Steward Observatory to host free lecture on dark matter in Spanish

The Steward Observatory began offering Spanish lectures in fall 2018. The next Spanish lecture will feature Dennis Zaritsky, deputy director of the observatory and an astronomy professor at the UA.

As a part of its annual evening lecture series, the University of Arizona’s Steward Observatory will host a free lecture on dark matter entirely in Spanish.

The Steward Observatory has been hosting public astronomy lectures in English since 1922 but began offering Spanish lectures in fall 2018.

The next Spanish lecture will feature a talk from Dennis Zaritsky, deputy director of the Steward Observatory and a professor of astronomy at UA, on the history of dark matter, a mysterious force believed to be making the universe larger.

“I’m going to be focusing on dark matter, which is 85% of all the matter in the universe, but it’s something we don’t know a lot about,” he said. “So, I’m going to talk about the history of that process and key pieces of evidence that have led us to understand that we are dominated by dark matter. I’ll also discuss what it might be and where we go from here.”

The hourlong talk will begin at 7:30 p.m. on Monday, Oct. 21, in room N210 of the Steward Observatory at 933 N. Cherry Ave.

After the lecture, attendees will also have the opportunity to view the night sky from the telescope in the historic Steward Observatory dome.

“Astronomy is a fascinating topic. We have a real strength here in Tucson with a high standing astronomy department,” Zaritsky said.

“It’s a good opportunity for people in the community to come and hear the latest astronomy research and understand how weird our universe can be, and people should take advantage of that.”

With a large Spanish-speaking community at the university and in Tucson, the talk allows the observatory to expand its reach and provide educational opportunities for more than just English speakers, according to Zaritsky.

“We have this public lecture series every two weeks on different topics. Our talks are aimed at the general public. I know sometimes the science jargon can be a little intimidating, so we’re trying to make these lectures understandable,” he said. “By making at least one per semester in Spanish, we’re hoping to perhaps make it more understandable to that segment of the community.”

For more information on the Steward Observatory Public Evening lecture Series, visit

Contact reporter Jasmine Demers at

On Twitter: @JasmineADemers

Subscribe to stay connected to Tucson. A subscription helps you access more of the local stories that keep you connected to the community.

Be the first to know

* I understand and agree that registration on or use of this site constitutes agreement to its user agreement and privacy policy.


Jasmine joined the Star in 2019. With a master’s degree in journalism, Jasmine served in a variety of leadership roles, including The Daily Wildcat's editor-in-chief. She was also named Outstanding Newsperson of the Year by the UA School of Journalism.

Related to this story

Get up-to-the-minute news sent straight to your device.


News Alerts

Breaking News