Pope Leo XIV marked the 56th anniversary of the Apollo 11 moon landing with a video call to U.S. astronaut Buzz Aldrin and a visit to the Vatican Observatory, located on the papal estate of Castel Gandolfo, where he has been staying for two weeks.
According to the Vatican, the pontiff’s July 20 call with the 95-year-old Aldrin, the last surviving Apollo 11 crew member, included reminiscing on the historic 1969 landing and meditating together on the “mystery, greatness, and fragility” of God’s creation as described in Psalm 8.
Earlier in the day, Leo visited the Vatican’s internationally-recognized observatory, called the Specola Vaticana, where he was able to look through the astronomical center’s historic telescopes.
The Vatican Observatory has been located on the papal estate of Castel Gandolfo, around 18 miles southeast of Rome, since the 1930s, but the history of the institution dates to the 18th century. After several years of closure in the late 1800s, Leo’s predecessor, Pope Leo XIII, re-founded the observatory in 1891.
In 1993, the Vatican Observatory Research Group, which opened a second research center at the University of Arizona in Tucson in 1981, completed construction of the Vatican Advanced Technology Telescope in Mount Graham, Arizona.
Pope Leo has been taking a break from the heat of Rome with a sojourn at the lakeside town of Castel Gandolfo, a revival of a tradition last observed by Pope Benedict XVI. The pontiff’s stay was originally expected to end July 20, but the Vatican announced Sunday that Leo had extended the two-week stay an additional two days, through July 22.
On June 16, Pope Leo XIV, who holds a degree in mathematics from Villanova University, expressed his appreciation for astronomy when he received the participants of this year’s Vatican Observatory Summer School.
On that occasion, he asked the young scientists to never forget “that what they do is meant to benefit everyone.”
“Be generous in sharing what you learn and what you experience, to the best of your ability and in any way possible,” he added.
The pope also urged them not to hesitate to share “the joy and wonder born of your contemplation of the ‘seeds’ which, in the words of St. Augustine, God has sown in the harmony of the universe.”
The summer program, held every two years, brings together young astronomers from different countries. The most recent edition hosted 24 students from 22 nations under the theme “Exploring the Universe with the James Webb Space Telescope,” an instrument that has revolutionized astronomical observation since 2022.
During his meeting with astronomy students, Pope Leo highlighted the importance of the advances made by the telescope: “For the first time we can deeply observe the atmosphere of exoplanets where life may be developing and study the nebulae where the planetary systems themselves are forming” as well as trace “the ancient light of distant galaxies, which speaks of the very beginning of our universe.”
By By Hannah Brockhaus & Diego López Marina
This article was orginally published by Catholic News Agency on July 21, 2025.
