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Early astrobiology research focused on the search for extraterrestrial life and the study of the potential for life to exist on other planets. [2] In the 1960s and 1970s, NASA began its astrobiology pursuits within the Viking program, which was the first US mission to land on Mars and search for signs of life. [4]
Carl Sagan Institute. Lisa Kaltenegger (4 March 1977 in Kuchl nearby Salzburg) is an Austrian astronomer specialising in the modeling and characterization of exoplanets and the search for life. On July 1, 2014, she was appointed Associate Professor of Astronomy at Cornell University. [1][2] Previously, she held a joint position at the Max ...
The most massive planet listed on the NASA Exoplanet Archive is DENIS-P J082303.1−491201 b, [108] [109] about 29 times the mass of Jupiter, although according to most definitions of a planet, it is too massive to be a planet and may be a brown dwarf instead.
It is claimed as private property by several individuals. [1] [2] Extraterrestrial real estate refers to claims of land ownership on other planets, natural satellites, or parts of space by certain organizations or individuals. Previous [clarification needed] claims are not recognized by any authority, and have no legal standing.
Enrico Fermi (1901–1954) The Fermi paradox is a conflict between the argument that scale and probability seem to favor intelligent life being common in the universe, and the total lack of evidence of intelligent life having ever arisen anywhere other than on Earth. The first aspect of the Fermi paradox is a function of the scale or the large ...
The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way Galaxy. [1][2][3] The equation was formulated in 1961 by Frank Drake, not for purposes of quantifying the number of civilizations, but as a way to stimulate scientific dialogue at the first ...
William Feldman speculates the warming could be because Mars might be coming out of an ice age. [15] Other scientists state the warming may be a result of albedo changes from dust storms. [16] [17] The study predicts the planet could continue to warm, as a result of positive feedback. [17]
The Rare Earth hypothesis argues that planets with complex life, like Earth, are exceptionally rare.. In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the origin of life and the evolution of biological complexity, such as sexually reproducing, multicellular organisms on Earth, and subsequently human intelligence, required an improbable combination of astrophysical ...