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We describe a new system for a society of highly advanced civilizations around a super massive black hole (SMBH), as an advanced Type III "Dyson Sphere", pointing out an efficient usage of energy for the advanced civilizations. SMBH also…

General Physics · Physics 2011-12-26 Makoto Inoue , Hiromitsu Yokoo

The Search for Extra-Terrestrial Intelligence (SETI) has so far been unsuccessful and needs additional methods. We introduce a two-dimensional metric for civilization development, using the Kardashev scale of energy increase and the Barrow…

General Physics · Physics 2011-04-25 Clement Vidal

The search for extraterrestrial intelligence (SETI) has been conducted for nearly 60 years. A Dyson Sphere, a spherical structure that surrounds a star and transports its radiative energy outward as an energy source for an advanced…

We investigate the microlensing detectability of extraterrestrial technosignatures originating from Dyson sphere \textendash like structures, such as Dyson Swarms surrounding primordial black holes (PBHs). These hypothetical swarms consist…

Instrumentation and Methods for Astrophysics · Physics 2026-02-17 Shant Baghram

Humanity has wondered whether we are alone for millennia. The discovery of life elsewhere in the Universe, particularly intelligent life, would have profound effects, comparable to those of recognizing that the Earth is not the center of…

The presence of dark energy in our universe is causing space to expand at an accelerating rate. As a result, over the next approximately 100 billion years, all stars residing beyond the Local Group will fall beyond the cosmic horizon and…

Cosmology and Nongalactic Astrophysics · Physics 2018-06-15 Dan Hooper

We investigate looking for black hole starships using very high energy gamma ray telescopes. We find they would be above the threshhold of visibility although there are many unknown factors.

General Relativity and Quantum Cosmology · Physics 2019-02-27 Louis Crane

We propose a search for sources of directed energy systems such as those now becoming technologically feasible on Earth. Recent advances in our own abilities allow us to foresee our own capability that will radically change our ability to…

Instrumentation and Methods for Astrophysics · Physics 2018-10-22 Philip Lubin

Over a period of several decades a concerted effort has been made to determine whether intelligent life exists outside of our solar system, known as the Search for Extraterrestrial Intelligence or SETI. This has been based primarily upon…

General Physics · Physics 2007-05-23 Fred H. Thaheld

Earth remains the only known example of a planet with technology, and future projections of Earth's trajectory provide a basis and motivation for approaching the search for extraterrestrial technospheres. Conventional approaches toward…

Earth and Planetary Astrophysics · Physics 2025-05-26 Jacob Haqq-Misra , Clément Vidal , George Profitiliotis

One of the most interesting questions that astronomy can hope to answer is: are we alone in our Milky Way galaxy? A detection of an electromagnetic (EM) signal generated by an extraterrestrial technological intelligence, or the presence in…

Instrumentation and Methods for Astrophysics · Physics 2026-05-01 B. Zuckerman

We describe the framework and strategy of the \^G infrared search for extraterrestrial civilizations with large energy supplies, which will use the wide-field infrared surveys of WISE and Spitzer to search for these civilizations' waste…

Popular Physics · Physics 2015-06-22 J. T. Wright , R. Griffith , S. Sigurðsson , M. S. Povich , B. Mullan

The search for extraterrestrial intelligence by looking for signals from advanced technological civilizations has been ongoing for some decades. We suggest that it could possibly be made more efficient by focusing on stars from which the…

Earth and Planetary Astrophysics · Physics 2009-03-10 Shmuel Nussinov

Humanity is at a critical juncture, marked by rapid technological advances and the pursuit of higher civilization stages on the Kardashev scale. This study explores humanity's potential progression toward Type I and Type II civilizations,…

Physics and Society · Physics 2025-10-07 Jonathan H. Jiang , Prithwis Das

Abridged: The interest towards searches for extraterrestrial civilizations (ETCs) was boosted by the discovery of thousands of exoplanets. We turn to the classification of ETCs for new considerations that may help to design better…

Popular Physics · Physics 2020-07-22 Valentin D. Ivanov , Juan Carlos Beamin , Claudio Caceres , Dante Minniti

This paper attempts to provide an estimation of the prevalence of hostile extraterrestrial civilizations through an extrapolation of the probability that we, as the human civilization, would attack or invade an inhabited exoplanet once we…

Physics and Society · Physics 2022-05-27 Alberto Caballero

Speculation about the existence of advanced forms of life in the Universe and in our galaxy, has been since ever a subject of fascination and discussion in fiction, as well as in astrophysics, biology and philosophy. The well-known Fermi's…

History and Philosophy of Physics · Physics 2025-11-18 Orfeu Bertolami

Searching for signatures of cosmic-scale archaeological artifacts such as Dyson spheres or Kardashev civilizations is an interesting alternative to conventional SETI. Uncovering such an artifact does not require the intentional transmission…

Astrophysics of Galaxies · Physics 2011-04-14 Richard A. Carrigan

In this article an analysis of the fundamentals used to search for extraterrestrial artificial signals in the galaxy, which have been developing for more than five decades, is presented. It is shown that the key factor for the success of…

Instrumentation and Methods for Astrophysics · Physics 2010-12-14 Guillermo A. Lemarchand
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