What will Chile’s latest telescope tell us about the universe?
The Inquiry
BBC
4.6 • 1.7K Ratings
🗓️ 22 July 2025
⏱️ 24 minutes
🧾️ Download transcript
Summary
In Chile, a powerful new telescope has just given a taster of what we can expect from it later this year, when it will be used to survey the cosmos over a ten-year period. In one image it revealed vast colourful gas and dust clouds swirling in a star-forming region 9,000 light years from the Earth.
Housed in the Vera C Rubin Observatory, which sits on a mountain in the Chilean Andes, the telescope is designed to get giant images of the sky about one hundred times larger and quicker than any other existing telescope can achieve. It contains the world’s most largest digital camera, the size of a large car.
When the Legacy Survey of Space and Time begins towards the end of 2025, the camera will film the entire Southern hemisphere night sky for the next decade, every three days, repeating the process over and over. And it will focus on four areas: mapping changes in the skies or transient objects, the formation of the Milky Way, mapping the Solar System and understanding dark matter or how the universe formed.
So, on this week’s Inquiry, we’re asking, ‘What will Chile’s latest telescope tell us about the Universe?’
Contributors: Catherine Heymans, Professor of Astrophysics, University of Edinburgh, Astronomer Royal for Scotland, UK Željko Ivezić, Director of Rubin Construction, Professor of Astronomy, University of Washington, USA Dr. Megan Schwamb, Planetary Astronomer, Reader, School of Mathematics and Physics, Queen’s University, Belfast, Northern Ireland Dr. Burçin Mutlu-Pakdil, Observational Astronomer, Assistant Professor, Physics and Astronomy, Dartmouth College, New Hampshire, USA
Presenter: Charmaine Cozier Producers: Louise Clarke and Jill Collins Researcher: Maeve Schaffer Editor: Tara McDermott Technical Producer: Craig Boardman Production Management Assistant: Liam Morrey
Image Credit: Anadolu via Getty Images
Transcript
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| 0:30.3 | Welcome to the inquiry from the BBC World Service. |
| 0:33.3 | I'm Charmaine Kosier. |
| 0:34.8 | Each week, one question, four expert witnesses and an answer. |
| 0:42.6 | June 2025, Washington, D.C. |
| 0:47.7 | A live stream media conference is revealing some new images and they're out of this world. |
| 0:55.5 | The speakers include one of our expert witnesses, Professor Jelko Iversich. |
| 1:00.6 | The entire Rubin team is so excited about this data. |
| 1:06.7 | We have been talking about this data for over two decades. |
| 1:11.5 | It's finally here. |
| 1:13.5 | The Virarubian Observatory is in Chile. |
| 1:17.1 | The South American country is a world-leading location for astronomical research. |
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