{"id":3643,"date":"2026-07-04T10:07:21","date_gmt":"2026-07-04T10:07:21","guid":{"rendered":"https:\/\/metrotransitreview.com\/?p=3643"},"modified":"2026-07-04T10:07:21","modified_gmt":"2026-07-04T10:07:21","slug":"astronomers-discover-earths-new-next-door-neighbor-a-potentially-habitable-planet","status":"publish","type":"post","link":"https:\/\/metrotransitreview.com\/?p=3643","title":{"rendered":"Astronomers discover Earth\u2019s new \u2018next-door neighbor\u2019 \u2014 a potentially habitable planet"},"content":{"rendered":"
\n

A newly discovered and potentially habitable exoplanet scientists are calling Earth\u2019s \u201cnext-door neighbor\u201d could be the next stepping stone in humanity\u2019s search for extraterrestrial life.<\/p>\n

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\u201cThis one\u2019s exciting,\u201d Paul Robertson of the University of California, Irvine, said in a statement on Tuesday, adding that \u201cit\u2019s one of our closest cosmic neighbors.\u201d\u00a0<\/p>\n

\u201cTwenty-five light years sounds like a long way, but the Milky Way is about 100,000 light years across, so in that respect it\u2019s our next-door neighbor,\u201d said Robertson, the lead author of a new study published in The Astrophysical Journal.<\/p>\n

The exoplanet, called \u201cGJ 3378b,\u201d is approximately twice the size of Earth and is located in the Goldilocks zone, the scientific region around a star where a planet\u2019s surface temperature is just right to maintain liquid water.<\/p>\n

Whether the planet has an atmosphere remains a crucial component of its ability to host life \u2014 GJ 3378b sits on the edge of the \u201ccosmic shoreline,\u201d a metric that determines whether a planet can retain an atmosphere based on gravity versus the radiation it receives.\u00a0<\/p>\n

\u201cIf you scale the Earth down to the size of an apple, its atmosphere would be about as thick as the skin of the apple,\u201d said Robertson.<\/p>\n

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\u201cThat\u2019s just enough to maintain the kinds of surface pressures where you can have liquid water,\u201d he explained.<\/p>\n

\u201cIt\u2019s enough that there\u2019ll be breathable air, and it provides maybe a little bit of protection from the harsh radiation environment of space.\u201d<\/p>\n

More observatories are required to determine if a given planet has any kind of atmosphere, which could \u201cjustify further research looking for biosignatures, liquid water or other signs of life that require both an atmosphere and the right amount of heating from the host star,\u201d said Gogod James, a UC Irvine student in Robertson\u2019s group who helped study the size of GJ 3378b.<\/p>\n

\n<\/div>\n

NASA has plans to construct the Habitable Worlds Observatory, which is slated to launch in the next 20 years or so.\u00a0<\/p>\n

If completed, astronomers will begin to search for chemicals in atmospheres that could have been produced by life.\u00a0<\/p>\n

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\u201cI think that\u2019s just too much fun,\u201d said Robertson.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

A newly discovered potentially habitable exoplanet named GJ 3378b, described as Earth\u2019s \u201cnext-door neighbor,\u201d could be a key step in the search for extraterrestrial life.<\/p>\n","protected":false},"author":1,"featured_media":3642,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-3643","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-us-news"],"yoast_head":"\nAstronomers discover Earth\u2019s new \u2018next-door neighbor\u2019 \u2014 a potentially habitable planet - Metro Transit Review<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/metrotransitreview.com\/?p=3643\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Astronomers discover Earth\u2019s new \u2018next-door neighbor\u2019 \u2014 a potentially habitable planet - 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