Knowledge Tree
exoplanets
Also known as: exoplanet
Facts (18)
Sources
If we made contact with aliens, how would religions react? - BBC bbc.com Dec 16, 2016 7 facts
measurementAstronomers knew of approximately 50 exoplanets in the year 2000.
claimDavid Weintraub, an associate professor of Astronomy at Vanderbilt University and author of 'Religions and Extraterrestrial Life', predicts that the number of known exoplanets may reach one million by the year 2045.
quoteDavid Weintraub wrote: "We can quite reasonably expect that the number of known exoplanets will soon become, like the stars, almost uncountable."
measurementBy 2013, astronomers had discovered almost 850 exoplanets located in over 800 planetary systems.
measurementAstronomers knew of approximately 50 exoplanets in the year 2000, and by 2013, they had identified almost 850 exoplanets located in over 800 planetary systems.
claimDavid Weintraub, an associate professor of Astronomy at Vanderbilt University and author of 'Religions and Extraterrestrial Life', predicts that the number of known exoplanets may reach one million by the year 2045.
quoteDavid Weintraub stated: "We can quite reasonably expect that the number of known exoplanets will soon become, like the stars, almost uncountable."
UFOs and the U.S. government: The push towards greater ... - WBUR wbur.org Nov 14, 2023 4 facts
claimAs late as the 1990s, scientists did not know that exoplanets existed beyond the solar system.
claimCurrent scientific belief holds that there are planets around effectively every star in the universe.
claimAs of the 1990s, scientists did not know that there were any exoplanets, or planets beyond our own solar system.
claimAs late as the 1990s, scientists did not know that exoplanets or planets beyond the solar system existed.
Estimating The Number of Intelligent Extraterrestrial Civilizations ijcsrr.org Nov 25, 2025 1 fact
measurementBy applying current observational evidence of exoplanets, laboratory studies of prebiotic chemistry, and estimates of stellar and planetary habitability, the authors of 'Estimating The Number of Intelligent Extraterrestrial Civilizations' calculated a tentative value of approximately 72 civilizations capable of interstellar communication via radio astronomy.
Life on the Edge: Bioprospecting Extremophiles for Astrobiology link.springer.com May 19, 2023 1 fact
measurementAs of 2023, scientists have discovered nearly 200 planets and satellites within the solar system and more than 5,000 exoplanets orbiting stars in the universe.
Classroom discussion based on the Drake equation ojs.southfloridapublishing.com Feb 10, 2025 1 fact
claimAstrophysicists have discovered thousands of exoplanets, which provides support for the possibility that life can emerge in locations other than Earth.
Beyond Carbon-Based Life: Exploring Alternative Biochemistries in ... walshmedicalmedia.com 1 fact
claimThe James Webb Space Telescope has the potential to enhance the ability to analyze the atmospheres of exoplanets for biosignatures, including those associated with alternative biochemistries.
Carbon may not be the only basis for life. Look for silicon, too bigthink.com Jul 1, 2022 1 fact
claimA prerequisite for silicon-based life on an exoplanet or exomoon is the absence of significant amounts of free oxygen or liquid water.
Extraterrestrial Intelligence and the Catholic Faith: A Brief History of ... catholicscientists.org 1 fact
claimNicholas of Cusa anticipated the existence of exoplanets long before astronomers actually discovered them in the last decade of the twentieth century.
a special or general case in the search for extra-terrestrial life academia.edu 1 fact
claimA.J. Rushby et al. calculated the habitable zone lifetimes of exoplanets orbiting main sequence stars.