Detection technique for artificially illuminated objects in the outer solar system and beyond.

  title={Detection technique for artificially illuminated objects in the outer solar system and beyond.},
  author={Abraham Loeb and Edwin Lewis Turner},
  volume={12 4},
Existing and planned optical telescopes and surveys can detect artificially illuminated objects, comparable in total brightness to a major terrestrial city, at the outskirts of the Solar System. Orbital parameters of Kuiper belt objects (KBOs) are routinely measured to exquisite precisions of<10(-3). Here, we propose to measure the variation of the observed flux F from such objects as a function of their changing orbital distances D. Sunlight-illuminated objects will show a logarithmic slope… 

Novel Detection Techniques for Extraterrestrial Intelligence Beyond and Inside the Solar System

  • Physics
  • 2012
The scientific search for extraterritorial intelligence (SETI) began when Cocconi and Morrison (1959) pointed out that human radio technology (then achievable broadcast power and detection

Observational Constraints on the Great Filter.

The search for spectroscopic biosignatures with the next generation of space telescopes could provide observational constraints on the abundance of exoplanets with signs of life, and if planets with technosignatures are abundant, then it can increase confidence that the hardest step in planetary evolution-the Great Filter-is probably in the authors' past.

A Shiny New Method for SETI: Specular Reflections from Interplanetary Artifacts

  • B. Lacki
  • Physics
    Publications of the Astronomical Society of the Pacific
  • 2019
Glints of light from specular reflection of the Sun are a technosignature of artificial satellites. If extraterrestrial intelligences have left artifacts in the solar system, these may include flat

Searching for life among the stars

The recent discovery1 of a habitable Earth-mass planet four light years away and orbiting our nearest star, Proxima Centauri, revealed a new opportunity in the search for life. Due to the proximity

Finding mountains with molehills: the detectability of exotopography

Mountain ranges, volcanoes, trenches, and craters are common on rocky bodies throughout the Solar System, and we might we expect the same for rocky exoplanets. With ever larger telescopes under

Detectability of Chlorofluorocarbons in the Atmospheres of Habitable M-dwarf Planets

The presence of chlorofluorocarbons (CFCs) in Earth’s atmosphere is a direct result of technology. Ozone-depleting CFCs have been banned by most countries, but some CFCs have persisted in elevated

Detection of pre-industrial societies on exoplanets

Abstract Approximately 22% of sun-like stars have Earth-like exoplanets. Advanced civilizations may exist on these, and significant effort has been expended on the theoretical analysis of planetary

Benchmarking information carriers

S1473550420000361jra 1..8

Approximately 22% of sun-like stars have Earth-like exoplanets. Advanced civilizations may exist on these, and significant effort has been expended on the theoretical analysis of planetary systems,



Improving Earth-like planets' detection with an ELT: the differential radial velocity experiment

Context. Direct detection of Earth-like planets around a nearby star is extremely difficult for ground-based telescopes equipped with the eXtreme Adaptative Optics system. Aims. We propose to combine

Looking for life in unlikely places: reasons why planets may not be the best places to look for life

  • F. Dyson
  • Physics
    International Journal of Astrobiology
  • 2003
A new method is proposed to search for extraterrestrial life adapted to cold environments far from the Sun. To keep warm, using the light from a distant sun, any life-form must grow a system of


Planetesimal formation is a common by-product of the star formation process. Taking the dynamical history of the solar system as a guideline—in which the planetesimal belts were heavily depleted due

Physical Properties of Kuiper Belt and Centaur Objects: Constraints from the Spitzer Space Telescope

Detecting heat from minor planers in the outer solar system is challenging, yet it is the most efficient means for constraining the albedos and sizes of Kuiper belt objects (KBOs) and their progeny,

Initial Results from Harvard All-sky Optical SETI

Search for temporal coherence in the sky

  • E. Ribak
  • Physics
    SPIE Astronomical Telescopes + Instrumentation
  • 2006
A new observation mode, a survey of temporal coherence in large fields, is described. Longitudinal coherence can arise in many astrophysical scenarios and at different wave lengths, from plasma

Targeted and all-sky search for nanosecond optical pulses at Harvard-Smithsonian

We have built a system to detect nanosecond pulsed optical signals from a target list of some 10,000 sun-like stars, and have made some 20,000 observations during its two years of operation. A

Eavesdropping on radio broadcasts from galactic civilizations with upcoming observatories for redshifted 21 cm radiation

The question of whether intelligent life exists elsewhere is one of the fundamental unknowns about our Universe. Over the past decade extra-solar planets have been discovered, providing new urgency

Photometric Lightcurves of Transneptunian Objects and Centaurs: Rotations, Shapes, and Densities

We discuss the transneptunian objects and Centaur rotations, shapes, and densities as determined through analyzing observations of their short-term photometric lightcurves. The lightcurves are found

Diverse albedos of small trans-neptunian objects