Lunar Crater Radio Telescope: NASA’s Revolutionary Leap into Cosmos


Discover how NASA plans to go beyond James Webb Space Telescope with a colossal Lunar Crater Radio Telescope—aimed at uncovering the secrets of the primordial universe.

The Shortcomings of Earth-Based Telescopes

Why Earth Isn’t Enough

Remember James Webb Space Telescope? It opened new horizons but has its limitations. Huge Earth-based radio telescopes like Arecibo also have drawbacks, from terrestrial interference to limited lifespan. Arecibo collapsed in 2020 after 57 years!

FactDetails in Numbers
NameLunar Crater Radio Telescope (LCRT)
LocationFar side of the Moon
Wavelengths ObservedGreater than 10m
Deployment Diameter1km wire-mesh
Crater Size3-5km diameter
Robots UsedWall-climbing DuAxel robots
Size RankingLargest filled-aperture radio telescope in Solar System
Scientific Impact – FieldCosmology
Scientific Impact – Wavelength Band10-50m (6-30MHz frequency)

The Moon as a Solution

The Moon offers a natural shield against Earth’s radio noise and a stable platform. Imagine using moon craters to hold a telescope, much like Arecibo’s sinkhole. Sounds incredible, right?

The Lunar Crater Radio Telescope Concept

The Lunar Crater Radio Telescope

A Grand Design

This telescope isn’t some distant dream. NASA envisions Moonish 50 meters larger than Arecibo, situated in a 1.3-kilometer-wide moon crater. It’s part of NASA’s “futuristic tech” brainstorming, set for possible implementation in the next two decades.

Engineering Brilliance

The plan leverages lunar gravity to shape wire mesh into a dish. This approach significantly reduces the structure’s weight. The mesh design ensures it reflects radio waves, using principles similar to your microwave oven’s mesh screen.

If you’re fascinated by the ambitious plans for the Lunar Crater Radio Telescope and find yourself inspired to explore the cosmos from your own backyard, you’ll definitely want to check out our guide on the best telescopes of 2023.

Finding the Perfect Crater

Moon crater

Why Location Matters

Selecting the perfect crater isn’t easy. The Moon’s far side, tidally locked away from Earth, is ideal for shielding the telescope from Earth’s radio noise. However, the crater must meet specific criteria, including size, depth, and smoothness.

The Final Choice

Out of 82,000 potential candidates, only 300 met the stringent criteria. A further shortlist of 50 was studied before finalizing the perfect location—situated almost 10 degrees north, away from Milky Way interference.

Engineering Challenges and Solutions

The Lunar Crater Radio Telescope, Engineering Challenges and Solutions

Material Constraints

Here’s the catch: transporting materials from Earth is costly. Carbon fiber cables, which withstand the Moon’s temperature swings, make a lightweight yet strong framework.

Structural Design

Creating a perfect parabolic shape isn’t easy. Anchoring the wires effectively without human intervention is another puzzle. Solutions involve innovative technologies like duaxel robots and anchor-firing landers.

Cost and Feasibility

James Webb Space Telescope vs. Lunar Crater Radio Telescope

The Lunar Crater Radio Telescope

Costs? A single lander design might need just $2.4 billion. In contrast, James Webb Space Telescope cost a staggering $10 billion. Robots would raise the budget to $4.5 billion.

The Deployment Process

Once the anchors are in place, an antenna receiver is raised to the dish’s focal point. A robotic pulley system could be deployed to minimize friction against the lunar surface.

Scientific Impact

moon and sun

What Will We Learn?

The telescope aims to capture signals from the electromagnetic spectrum between 4.7 MHz and 47 MHz. This can provide unprecedented data on hydrogen distribution in the Moon’s universe.

Testing Existing Theories

Current theories suggest uniform hydrogen distribution. However, assumptions are made to be tested. The telescope’s ability to detect hydrogen over time through redshifting will provide invaluable insights.

The Pioneering Promise of the LCRT

The Lunar Crater Radio Telescope (LCRT) is an ambitious proposal to set up an ultra-long-wavelength telescope on the far side of the Moon. This strategic location offers two significant advantages: the capacity to observe wavelengths above 10m, usually reflected by Earth’s ionosphere and natural shielding from Earth’s radio interferences. 

Using wall-climbing DuAxel robots, the project aims to deploy a 1km-diameter wire-mesh inside a 3-5km lunar crater. Upon completion, the LCRT would become the largest filled-aperture radio telescope in the Solar System. Its potential to explore previously unexamined frequencies could revolutionize our understanding of cosmology.


The Lunar Crater Radio Telescope is not just another scientific instrument. It’s a bold step in our cosmic journey, promising to unlock secrets that even James Webb couldn’t glimpse. Are you ready for the revolution?

If you’re interested in lunar exploration and the scientific potential of the Moon, you might also want to read about the ongoing debate regarding the presence of water on the Moon in our in-depth article.


1. What is the Lunar Crater Radio Telescope (LCRT)?

The LCRT is a proposed ultra-long-wavelength telescope to be situated on the Moon’s far side. Its primary advantage is the ability to explore wavelengths greater than 10m, which are reflected by Earth’s ionosphere.

2. How does the LCRT compare to Earth-based telescopes?

Unlike Earth-based telescopes, the LCRT’s location shields it from radio interferences originating from Earth, Earth-orbiting satellites, and the Sun’s radio noise during the lunar night. This offers a distinct observational advantage.

3. What is the estimated cost of the LCRT?

A basic lander design for the LCRT is estimated to cost around $2.4 billion. Including wall-climbing DuAxel robots for deployment could raise the budget to $4.5 billion.

4. What is the James Webb Space Telescope?

James Webb Space Telescope is an orbiting infrared observatory set to replace the Hubble Telescope. It’s one of the most expensive telescopes ever built, with a cost of $10 billion.

5. How do the costs of the LCRT and James Webb Space Telescope compare?

James Webb Space Telescope is significantly more expensive, costing approximately $10 billion. In contrast, even the more expensive LCRT version with robots is estimated to cost $4.5 billion.

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