Probes

Unlike crewed spacecraft, automated probes would be a viable means of extending a civilization's reach outside of its own solar system with minimal expense or risk. Our own civilization has already sent two probes into interplantary space.

Probes also improve on two of the challenges of optical, radio and other forms of information-only broadcast: they're cheap when compared with the cost of constantly powering a signal beacon, and if augmented with some level of autonomous AI can be a much more responsive communications channel than long distance speed-of-light communication.

Detectability

  • Although for all practical purposes undetectable at a distance, probes which enter our own solar system or are already here as passive observers are theoretically among the most detectable technosignatures.
  • Various search locations and contact strategies have been proposed as a means of detecting or potentially "turning on" probes already in our vicinity.

Research

21-Mar-2022
The Astrophysical Journal Letters
21-Mar-2022
Acta Astronautica
15-Nov-2021
25-Oct-2021
Acta Astronautica
21-Oct-2021
Journal of the BIS
6-Oct-2021
1-Oct-2021
22-Sep-2021
17-Sep-2021
The Astronomical Journal
20-Jul-2021
(21-Mar-2022)
The Astrophysical Journal Letters
(21-Mar-2022)
Acta Astronautica
Martin Elvis (15-Nov-2021)
(25-Oct-2021)
Acta Astronautica
(21-Oct-2021)
Journal of the BIS
(6-Oct-2021)
(1-Oct-2021)
(22-Sep-2021)
(17-Sep-2021)
The Astronomical Journal
(20-Jul-2021)