earth-like planetsLooking for another Earth? An international team of researchers has pinpointed which of the more than 4,000 exoplanets discovered by NASA’s Kepler mission are most likely to be similar to our rocky home.  The new research outlines 216 Kepler planets located within the “habitable zone” — the area around a star in which a planet’s surface could hold liquid water. Of those, they list 20 that are the best candidates to be habitable rocky planets like Earth.

“This is the complete catalog of all of the Kepler discoveries that are in the habitable zone of their host stars,” said Stephen Kane, an associate professor of physics and astronomy at San Francisco State University and lead author of the study. “That means we can focus in on the planets in this paper and perform follow-up studies to learn more about them, including if they are indeed habitable.”

The research also confirms that the distribution of Kepler planets within the habitable zone is the same as the distribution of those outside of it — additional evidence that the universe is teeming with planets and moons where life could potentially exist.

The boundaries of the habitable zone are critical. If a planet is too close to its star, it will experience a runaway greenhouse gas effect, like Venus. But if it’s too far, any water will freeze, as is seen on Mars. Kane and his colleagues sorted the planets by whether they were in a conservative or a more optimistic interpretation of the habitable zone. Then they further sorted them by planet size: smaller, rocky planets versus larger gas giants.


The four categories are aimed at helping astronomers focus their research. Those looking for moons that could potentially hold life can study exoplanets in the gas giant categories, for example.

The 20 planets in the most restrictive category — rocky surface and a conservative habitable zone — are the most likely to be similar to Earth. Kane has already begun gathering additional data on these planets, as well as those in the other categories.

Studying and cataloging the more than 4,000 exoplanets took more than three years and involved researchers at NASA, Arizona State University, Caltech, University of Hawaii-Manoa, the University of Bordeaux, Cornell University and the Harvard-Smithsonian Center for Astrophysics. The team included Natalie Hinkel, a former SF State post-doctoral scholar now with Arizona State, and Michelle Hill, an undergraduate Australian student studying abroad at SF State.

“It’s exciting to see the sheer amount of planets that are out there, which makes you think that there is zero chance of there not being another place where life could be found,” said Hill, who sought out Kane shortly after arriving on campus and soon got involved with the research.


Kane is one of the world’s leading “planet-hunters,” having discovered several hundred exoplanets, including Kepler-186f, a rocky planet included in the new catalog illustrated above. He is contributing his scientific knowledge to two upcoming satellite missions – NASA’s Transiting Exoplanet Survey Satellite (TESS) and the European Space Agency’s Characterizing ExOPLanet Satellite (CHEOPS) — that will benefit from the information contained in his latest research.

“There are a lot of planetary candidates out there, and there is a limited amount of telescope time in which we can study them,” Kane said. “This study is a really big milestone toward answering the key questions of how common is life in the universe and how common are planets like the Earth.”

From The Daily Galaxy via San Francisco State University

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  1. Although the gist of the article implies that we should be finding Earth-like planets for colonization, the reason the article is on PFC is to show that there are very many planets the can host civilizations similar to ours.

    One of the main points presented by the Cabal through their control of the media and the army of noxious trolls sliming the Internet is that interstellar travel (using rockets) is too difficult, since it would take thousands of years to travel the distance at subliminal speeds.

    Of course that is irrelevant because advanced civilizations discover that the nature of space creates portals allowing people and craft to jump from one place to another. We have discovered this too, but the Elite have publicly suppressed that information and used in their breakaway civilization AKA the Secret Space Program.

    It needs to be common knowledge that not only are there numerous planets like Earth, but also that those civilizations can and do travel here, for science, for curiosity and for resources. This information is just one piece of a refutation of the story that “we are alone”.

    We are not alone, we are just one of tens of thousands of inhabited planets, many of which host advanced civilizations who regularly visit this part of the Galaxy.

  2. Kane, don’t you think that before searching for another “Earth”, I think that we have the obligation to love our mother Earth, to care for her before we look out for another vrigin planet to destroyit like we did so far and still doing with our beautiful blue planet


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