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All articles tagged with "technosignatures"

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© 2026 Developments Today. All rights reserved.

technosignatures Articles | Developments Today

*A hypothetical Dyson Sphere Swarm. Credit: Wikipedia*

Webb observations rule out two more Dyson sphere candidates

Webb follow-up observations eliminated two M-dwarf Dyson sphere candidates identified by Project Hephaistos.
Researchers found the infrared excess came from background galaxies, not artificial megastructures around the stars.
The result highlights how difficult technosignature searches are and why high-resolution follow-up is essential.

DE

DT Editorial Team·Aug 27, 2026·via universetoday.com

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Glowing beams from the 4 Laser Guide Star Facility. Credit - ESO/P. Horálek

SETI Researchers Argue We May Be Missing Slower Alien Beacons

A new preprint says SETI may be searching for the wrong type of optical signal.
The authors argue practical civilizations might prefer longer, cheaper laser pulses over ultra-short bursts.
They also suggest detectable beacons may be placed far from a home star to reduce interference.

DE

DT Editorial Team·Jul 26, 2026·via universetoday.com

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Artist's impression of 'Oumuamua, our first known interstellar visitor. Credit - NASA, ESA, and J. Olmsted and F. Summers (STScI)

A Study Says We’ve Barely Searched for Alien Probes

The paper asks whether physical extraterrestrial technosignatures could be present in the Solar System today.
Humanity has already sent five spacecraft onto escape trajectories out of the Solar System.
The study uses a four-part framework covering active and passive artifacts in space and on surfaces.
Its conclusion is that current technology is insufficient to rule the idea out.

DE

DT Editorial Team·Jun 16, 2026·via universetoday.com

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A study has listened to 70,000 stars and planetary systems for signs of life! (Credit : ESO/Y. Beletsky)

After Ten Years and 70,000 Targets, a Major UCLA SETI Search Reports No Confirmed Technosignatures

A UCLA team used the Green Bank Telescope for ten years to survey more than 70,000 stars and planetary systems.
The search produced 100 million candidate signals, all of which were traced to human-made interference.
The resulting upper limit suggests fewer than one in 16,000 nearby stars hosts a detectable transmitter of this kind.

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DT Editorial Team·May 17, 2026·via universetoday.com

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Photo taken by Bettymaya Foott as part of an astrophotography project with the National Radio Astronomy Observatory and the Very Large Array (VLA).
Credit: Bettymaya Foott, NRAO/AUI/NSF

Scientists Call for SETI to Expand Beyond Narrow Radio Spectrum

A new paper argues that 60+ years of narrow radio/microwave SETI searches have produced no results and the methodology needs rethinking
Authors propose expanding to optical, infrared, gamma-ray, and X-ray frequencies plus broader technosignature detection
Modern machine learning tools make a wider-spectrum search computationally practical for the first time

DE

DT Editorial Team·Mar 18, 2026·4 min read·via universetoday.com

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