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The Wow! Signal
The Wow! Signal
Sensitivity vs range for SETI radio searches. The diagonal lines show transmitters of different effective powers. The x-axis is the sensitivity of the
Sensitivity vs range for SETI radio searches. The diagonal lines show transmitters of different effective powers. The x-axis is the sensitivity of the search. The y-axis on the right is the range in light-years, and on the left is the number of Sun-like stars within this range. The vertical line labeled SS is the typical sensitivity achieved by a full sky search, such as BETA above. The vertical line labeled TS is the typical sensitivity achieved by a targeted search such as Phoenix.
Arecibo Telescope in Puerto Rico with its 300 m (980 ft) dish was one of the world's largest filled-aperture (i.e. full dish) radio telescope and cond
Arecibo Telescope in Puerto Rico with its 300 m (980 ft) dish was one of the world's largest filled-aperture (i.e. full dish) radio telescope and conducted some SETI searches.
Microwave window as seen by a ground based system. From NASA report SP-419: SETI – the Search for Extraterrestrial Intelligence
Microwave window as seen by a ground based system. From NASA report SP-419: SETI – the Search for Extraterrestrial Intelligence
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Besides Earth, Mars, Europa and Enceladus are the most likely places in the Solar System to find life.
Besides Earth, Mars, Europa and Enceladus are the most likely places in the Solar System to find life.
Lifeforms produce a variety of biosignatures that may be detectable by telescopes.
Lifeforms produce a variety of biosignatures that may be detectable by telescopes.
The Green Bank Telescope is one of the radio telescopes used by the Breakthrough Listen project to search for alien communications.
The Green Bank Telescope is one of the radio telescopes used by the Breakthrough Listen project to search for alien communications.
Artist's impression of Gliese 581 c, the first terrestrial extrasolar planet discovered within its star's habitable zone
Artist's impression of Gliese 581 c, the first terrestrial extrasolar planet discovered within its star's habitable zone