Scientists are proposing a new lunar radio telescope, the Lunar Farside Transients and Technology Telescope (LFT3), aiming to establish it on the moon’s far side before the region loses its exceptional radio silence. This instrument would enable the detection of subtle cosmic signals, including enigmatic radio bursts and potential signals from extraterrestrial technology.
For many years, the moon’s far side has been considered an ideal spot for radio astronomy due to its natural shielding from Earth’s radio interference caused by satellites, radar, and other technological activity.
However, preserving this unique quiet zone is becoming increasingly challenging. The notable “Wow!” signal detected in 1977 emerged during a period of much lower radio noise. Nowadays, a similar signal could easily be drowned out by the barrage of transmissions generated by today’s technology.
A Limited Opportunity for a Lunar Radio Observatory
The concept behind LFT3 focuses on deploying the telescope on the moon’s far side while it remains one of the best radio-quiet zones. As lunar exploration increases, human-made radio interference is likely to grow, compromising the site’s suitability.
In a preprint shared on arXiv, lead author David DeBoer and his team from the University of Oxford outline a plan to establish a radio telescope on the lunar far side before persistent radio-frequency interference (RFI) takes hold.
The team anticipates that by 2030, an expanding presence of orbiters and landers around the moon will generate new sources of interference. While the far side will remain scientifically important, its window as a radio-quiet haven is closing.
This mission, potentially supported by NASA’s Commercial Lunar Payload Services (CLPS) program, is estimated to cost about $150 million and aims to deploy the telescope before the decade ends.
Capturing Cosmic Signals Far From Earthly Noise
The LFT3 telescope will scan the universe in HF, VHF, and UHF bands during a scheduled ~20-week mission. It will focus on three scientific objectives, including the search for technosignatures—potential signals from advanced extraterrestrial civilizations. The project receives backing from the Breakthrough Listen initiative, which aims to find signs of technological activity beyond Earth.
Another target is the detection of exoplanetary auroras, which produce radio emissions that can reveal details about distant planets’ magnetic fields and environments. Additionally, the telescope will observe fast radio bursts (FRBs) and long-duration transient phenomena.
As detailed in the LFT3 proposal, the moon’s far side offers an environment free from much of Earth’s radio interference, allowing clearer study of both rare cosmic signals and natural phenomena that are otherwise hard to detect.
Engineering Challenges of a Lunar Telescope
Deploying a radio telescope on the moon involves overcoming severe technical obstacles. The equipment must endure drastic temperature variations, with daytime temperatures soaring to roughly 120°C (248°F) and plunging near -130°C (-202°F) during lunar nights.
Communicating with Earth is complicated because the moon’s far side never faces Earth directly. LFT3 would require a satellite relay to transmit data back. Current lunar communication systems support only around 100 GB of data each month, creating limits on how much information can be sent. To address this, the telescope is designed to preprocess and filter data on-site, forwarding only the most critical findings.
The team emphasizes the need for radiation-hardened computers capable of operating in moon conditions to reduce raw data volume and optimize communication efficiency.
Although funding is still pending, this mission offers a rare chance to place a sensitive radio observatory in a location exceptionally shielded from the growing noise of human technology.
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