NASA announced the discovery of 7 new Earth-like planets on Wednesday, at a special press conference in Washington, DC.
The newly-discovered exoplanets could be home to extraterrestrial life-forms, under the right atmospheric conditions, according to the agency.
The exoplanets, meaning planets outside our solar system, circle the star TRAPPIST-1, which lies just 39 light-years from Earth.
The discovery sets a new record for the greatest number of habitable-zone planets found around a single star outside our solar system.
— ESO (@ESO) February 22, 2017
“This discovery could be a significant piece in the puzzle of finding habitable environments, places that are conducive to life,” Thomas Zurbuchen, associate administrator of NASA’s Science Mission Directorate in Washington, said in a statement.
“Answering the question, ‘Are we alone?’ is a top science priority and finding so many planets like these for the first time in the habitable zone is a remarkable step forward toward that goal.”
At a news conference to announce the discovery, one of the research team said TRAPPIST-1’s relatively close proximity to Earth means information on the planet’s life-hosting potential should soon be informed by hard data.
In a Q&A session following the announcement, NASA scientists said that the presence of water has not been confirmed on any of the newly-discovered planets.
— NASA Marshall News (@NASA_Marshall) February 22, 2017
They also confirmed that they have yet to name any of the exoplanets, because there is no easy system for naming planets outside of our solar system.
The exoplanet system is called TRAPPIST-1 after the Transiting Planets and Planetesimals Small Telescope (TRAPPIST) in Chile, which was used by researchers to discover three exoplanets last year. The latest discovery, which was made using the Spitzer Space Telescope, confirmed the existence of two of those previously discovered planets, along with an additional five.
Data gathered so far suggests that all the planets are likely covered with a rocky surface. The new results were published Wednesday in the journal Nature and announced at the news briefing at NASA HQ.
“The seven wonders of TRAPPIST-1 are the first Earth-size planets that have been found orbiting this kind of star,” said the lead author of the paper, Michael Gillon. “It is also the best target yet for studying the atmospheres of potentially habitable, Earth-size worlds.”
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