The Robert C. Byrd Green Bank Radio Telescope (GBT) focuses 2.3 acres of radio light. It is 485ft tall, nearly as tall as the nearby mountains and much taller than pine trees in the national forest. The telescope is in a valley of the Allegheny mountains to shield the observations from radio interference. -- NRAO/AUI

Astronomy & Telescopes, Citizen Science / Open Science, Intelligence & Language, SETI & Technosignatures, Status Report

Results Of Ten Tears Of UCLA SETI Searches With The Green Bank Telescope

by Keith CowingMay 11, 2026May 11, 2026

We have been conducting a search for narrowband radio signals with the L-band receiver (1.15-1.73 GHz) of the 100 m diameter Green Bank Telescope (Margot et al., 2023). So far, […]

Correlations of crystallization metrics with cluster mass, Galactocentric distance, and a dynamical-age proxy. Top row: Cindex versus log(Mcl/M⊙), RGC, and log10(tage/trh). Bottom row: the N⋆-corrected residual index Cresid versus the same quantities. Spearman rank coefficients and two-sided p-values are printed in each panel. Star symbols mark Tier 1 clusters. -- astro-ph.GA

AI - Data - Apps - Cybernetics, Astronomy & Telescopes, SETI & Technosignatures, Status Report

Phase-Space Crystallization in Galactic Globular Clusters: A Gaia-Based Metric and Implications for Technosignature Searches

by Keith CowingMay 9, 2026May 9, 2026

We develop a model-independent framework to quantify phase-space “crystallization”, the degree of ordered radial and kinematic substructure, in 79 Galactic globular clusters using the Gaia EDR3-based membership catalogue of E. […]

Astronomy & Telescopes, Conferences and Meetings, Intelligence & Language, Interstellar, Nanotechnology & SynBio, Press Release, SETI & Technosignatures

The Dyson Minds 2025 Workshop: SETI around Black Holes

by Keith CowingApril 24, 2026April 24, 2026

The Dyson Minds 2025 Workshop, held at the Center for Brains, Minds & Machines at MIT and organized by Penn State, MIT, and The Ultraintelligence Foundation, brought together researchers in […]

Sperm whale at water's surface. Credit: NOAA Fisheries

Intelligence & Language, SETI & Technosignatures, Status Report

CETI / SETI: The Phonology Of Sperm Whale Coda Vowels

by Keith CowingApril 15, 2026April 15, 2026

Sperm whales (Physeter macrocephalus) communicate using series of clicks known as codas. In previous research, sperm whale codas have been shown to resemble human vowels acoustically.

Schematic overview of the data-processing workflow in this work. After splitting the 2C data into three antenna spectra, we first conduct a general comb diagnostics for each antenna, then perform per-antenna PCA decomposition, basis alignment, and periodogram/FT/ACF analysis. The component-level results are finally combined to distinguish non-shared periodic signals from shared or comb-like RFI. -- astro-ph.IM

Artemis & Lunar Exploration, Astronomy & Telescopes, Biosignatures & Paleobiology, Missions & Hardware, Moon, SETI & Technosignatures, Status Report

First Lunar Farside SETI Observations for Periodic Signals With The Low-frequency Radio Spectrometer Of Chang’E-4 Mission

by Keith CowingApril 12, 2026April 12, 2026

Chang’E-4 (CE4), the first mission to soft-land on the lunar farside, provides a unique opportunity for astronomical observations from an environment shielded from terrestrial radio interference, and thus serves as […]

Transmitted power vs wavelength to various star systems of potential interest. The red dashed line shows the current wavelength limit of reflective optics. -- Nature

Astronomy & Telescopes, Biosignatures & Paleobiology, Interstellar, SETI & Technosignatures, Status Report

X-ray And γ-ray Beam Interstellar Communication And Implications For SETI

by Keith CowingApril 11, 2026April 11, 2026

The possibility of detecting artificial signals transmitted by alien civilizations via collimated X-ray or gamma-ray beams is investigated.

The final accumulated nighttime light change area: A night-time view of Earth, capturing human activity across the eastern hemisphere of the planet through the emissions of artificial light. Derived from satellite images taken daily over the past decade, the image maps the dynamics of the human night-time activity, with golden areas experiencing brightening, purple areas featuring dimming, and white areas experiencing both. Credit © Michala Garrison/NASA Earth Observatory

Astronomy & Telescopes, Imaging & Spectroscopy, Press Release, SETI & Technosignatures

Terrestrial Technosignatures: Satellites Capture The Glowing Pulse Of Human Civilization

by Keith CowingApril 10, 2026April 10, 2026

An analysis of data from the VIIRS DNB satellite instrument covering the years 2014 to 2022 finds that nighttime lighting is increasing globally by about two percent per year. “Although […]

Astronomy & Telescopes, Biosignatures & Paleobiology, Intelligence & Language, SETI & Technosignatures, Status Report

A TESS Test of the Hybrid Ring Strategy for Technosignature Searches Using GRB 221009A

by Keith CowingApril 9, 2026April 9, 2026

We present the first observational test of the hybrid ring strategy, a general coordinated signaling scheme proposed by Seto (2025), which provides a practical Schelling-point realization for interstellar signaling.

Scatter plots of potential candidate in frequency, drift rate and signal-to-noise ratio for each polarization channel. The color and the size for each point represent the value of SNR in log space. The green and red color bar is the frequency ranges of civil aviation and navigation satellites, respectively. The black dashed lines represent the expected drift rates for each observation date. -- astro-ph.IM

Astronomy & Telescopes, Biosignatures & Paleobiology, Comets and Asteroids, Intelligence & Language, Interstellar, Magnetic Fields, Electromagnetism, bioelectricity,, SETI & Technosignatures, Status Report

Narrowband Radio Technosignature Search Toward 3I/ATLAS With FAST

by Keith CowingMarch 21, 2026March 21, 2026

3I/ATLAS is the third confirmed interstellar object passing through the Solar System. In this work, we conduct narrowband radio technosignature search toward 3I/ATLAS using the Five-hundred-meter Aperture Spherical Telescope (FAST) […]