The California Institute of Technology announced it is moving forward with construction of the Deep Synoptic Array, a massive radio telescope project that will become the world’s most sensitive radio telescope array when completed. The facility will be located in White Pine County, Nevada, spanning more than 123 square miles of Bureau of Land Management land in the Great Basin.
The project will consist of 1,650 individual radio dishes, each measuring roughly 20 feet across. Construction could begin next year, with a targeted completion date of 2029. The telescope is designed to survey the sky 100 times faster than previous radio telescopes, with scientists saying it could double the total number of known radio sources in the universe within its first 24 hours of operation.
Scale and Scientific Significance
The Deep Synoptic Array represents a significant advancement in radio astronomy capabilities. According to Gregg Hallinan, professor of astronomy at Caltech and principal investigator for the project, the sheer number of antennas sets this telescope apart from existing facilities.
“It’s the sheer number of antennas that makes this completely unique and unlike other existing telescopes,” Hallinan said.
To put the project’s potential in perspective, Hallinan explained the historical context of radio astronomy discoveries. “Every telescope that has been built in history — and that’s going back a century — combined has found about 20 million radio sources. That’s how many radio sources we know of in the universe. This telescope will double that in the first 24 hours,” he said.
The array will study supermassive black holes, pulsars, and fast radio bursts. These celestial phenomena represent some of the most energetic and mysterious events in the universe, and the new telescope’s sensitivity could provide unprecedented data about their nature and behavior.
What We Know So Far
The project is currently in the permitting process, with two prototype dishes recently constructed near Bishop, California. The array will span more than 123 square miles in White Pine County, Nevada, on land managed by the Bureau of Land Management.
Funding for the Deep Synoptic Array came from Schmidt Sciences, the philanthropic organization created in 2024 by former Google CEO Eric Schmidt and his wife Wendy Schmidt. Eric Schmidt became CEO of Relativity Space last year, and that company won a NASA contract this week to deliver science instruments to Mars in 2028.
For comparison, the Green Bank Telescope measures 328 feet across, while the Very Large Array has 27 dishes. The Deep Synoptic Array’s 1,650 dishes represent a fundamentally different approach to radio astronomy, prioritizing quantity and distribution over individual dish size.
Scientific Capabilities and Collaboration
Vikram Ravi, professor of astronomy at Caltech and co-principal investigator for the Deep Synoptic Array, described the transformative potential of the new telescope.
“Radio astronomy is about to go from sketch to photograph. The DSA is looking at a far larger volume of the universe far more often than any other telescope,” Ravi said.
The telescope’s precision will enable coordination with other astronomical facilities around the world. “We’ll be able to say precisely where in the sky we detected the radio source, and then all these other telescopes — optical, infrared and X-ray observatories — can point there,” Ravi explained.
This capability means that discoveries made by the Deep Synoptic Array could trigger follow-up observations from multiple types of telescopes, creating a more complete picture of cosmic events as they occur.
Why Nevada Was Chosen
The selection of White Pine County, Nevada, for the telescope array was driven by the need for radio silence. Modern radio telescopes are extremely sensitive to interference from electronic devices and communications equipment.
“This telescope is sensitive enough to detect a cellphone as far away as the sun, so we need to try to get away from all that,” Hallinan explained.
The team conducted extensive surveys to find the quietest location possible for radio astronomy. “There are these quiet valleys that are also very low in population. This location in White Pine County was by far the quietest that we found, and it was just incredibly well-suited for radio astronomy,” Hallinan said.
The Great Basin region of Nevada offers the combination of remote location, low population density, and favorable terrain that makes it ideal for sensitive radio observations.
What Happens Next
The Deep Synoptic Array project is currently navigating the permitting process required for construction on Bureau of Land Management land. If permits are approved, construction could begin next year, with the goal of completing the array by 2029.
The project represents a continuation of Caltech’s leadership in radio astronomy and reflects growing interest from private philanthropic sources in funding major scientific infrastructure. Schmidt Sciences’ support for the project demonstrates how private funding is increasingly playing a role in advancing astronomical research.
Technical Specifications
The Deep Synoptic Array will feature 1,650 individual radio dishes, each measuring roughly 20 feet across. These dishes will be distributed across more than 123 square miles of Nevada desert, creating an array that can observe the sky 100 times faster than previous radio telescopes.
The telescope’s primary scientific targets include supermassive black holes at the centers of galaxies, pulsars that emit regular radio pulses, and fast radio bursts, which are brief but intense flashes of radio energy from distant cosmic sources that remain poorly understood.
Frequently Asked Questions
What is the Deep Synoptic Array?
The Deep Synoptic Array is a radio telescope project led by the California Institute of Technology that will consist of 1,650 individual radio dishes spanning more than 123 square miles in White Pine County, Nevada. It will be the world’s most sensitive radio telescope array when completed.
When will the Deep Synoptic Array be completed?
Construction could begin next year if permits are approved, with a targeted completion date of 2029. The project is currently in the permitting process.
Who is funding the Deep Synoptic Array?
Funding for the project came from Schmidt Sciences, the philanthropic organization created in 2024 by former Google CEO Eric Schmidt and his wife Wendy Schmidt.
What will the Deep Synoptic Array study?
The telescope will study supermassive black holes, pulsars, and fast radio bursts. Scientists say it could double the total number of known radio sources in the universe within its first 24 hours of operation.
How sensitive is the Deep Synoptic Array?
According to project scientists, the telescope is sensitive enough to detect a cellphone as far away as the sun, which is why it needs to be located in a remote area with minimal radio interference.
The Deep Synoptic Array project represents a major investment in radio astronomy infrastructure in the United States. The telescope’s unprecedented sensitivity and sky-surveying speed could fundamentally change how astronomers study the universe, providing data on millions of previously unknown radio sources and enabling new discoveries about some of the most energetic phenomena in the cosmos.
