{"id":2128,"date":"2026-09-21T01:07:00","date_gmt":"2026-09-20T16:07:00","guid":{"rendered":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-21-elias-2-24-b-youngest-planet-en\/"},"modified":"2026-09-21T01:07:00","modified_gmt":"2026-09-20T16:07:00","slug":"2026-09-21-elias-2-24-b-youngest-planet-en","status":"publish","type":"briefing","link":"https:\/\/onepress.co.kr\/index.php\/briefing\/2026-09-21-elias-2-24-b-youngest-planet-en\/","title":{"rendered":"A planet younger than one million years has become the youngest confirmed exoplanet"},"content":{"rendered":"

2026-09-21 01:07 KST<\/strong><\/p>\n

The Jupiter-scale object lies in a gap in a gas-and-dust disk about 450 light-years away and is still gathering material.<\/p>\n

The team reprocessed archived Keck images from 2018 and 2020 and compared them with VLT observations and ALMA disk structure.<\/p>\n

Why it is a record<\/h2>\n

Earlier record holders were older than five million years, so this object exposes a much earlier stage of giant-planet growth.<\/p>\n

What the gap shows<\/h2>\n

Planets have long been suspected of carving disk gaps, but finding one inside a gap is difficult. Independent instruments pointing to the same location made the case stronger.<\/p>\n

\"A
This AI-generated image explains the topic; it is not a photograph of an actual event, observation or field site.<\/figcaption><\/figure>\n

What remains unknown<\/h2>\n

Its precise mass, temperature, atmosphere and accretion rate remain uncertain because it sits near current detection limits.<\/p>\n

Next check<\/h2>\n

Spectroscopy and orbital monitoring should refine its dynamical mass and test how quickly core-accretion models can build a giant planet.<\/p>\n

Primary source and independent checks<\/h2>\n

The Astrophysical Journal Letters \uc6d0 \ub17c\ubb38<\/a><\/p>\n

NASA Science \ub3c5\ub9bd \uc124\uba85<\/a><\/p>\n

Keck Observatory \uad00\uce21 \uc124\uba85<\/a><\/p>\n

Read in other languages<\/h2>\n

\ud55c\uad6d\uc5b4<\/a> \u00b7 English<\/a> \u00b7 Espa\u00f1ol<\/a> \u00b7 \u65e5\u672c\u8a9e<\/a> \u00b7 Ti\u1ebfng Vi\u1ec7t<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Astronomers report Elias 2-24 b, younger than one million years, as the youngest confirmed exoplanet. The age is inferred from its young star and disk rather than measured as an exact birthday.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"class_list":["post-2128","briefing","type-briefing","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing\/2128","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/briefing"}],"about":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/types\/briefing"}],"wp:attachment":[{"href":"https:\/\/onepress.co.kr\/index.php\/wp-json\/wp\/v2\/media?parent=2128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}