·科学·
C1

Astronomers Discover New Cosmic Object Called a 'Black Hole Star'

「ブラックホール・スター」と呼ばれる新たな天体を天文学者が発見

#astronomy#black holes#space#James Webb Space Telescope
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Deep within the constellation Cetus, lurking billions of light-years from Earth, astronomers have uncovered an extraordinary cosmic entity: a "black hole star" the size of our entire solar system that radiates an intense red glow. The breakthrough, detailed in the journal Nature, sheds light on a missing link in how the early universe gave birth to supermassive black holes and shaped the structure of modern galaxies.

shed light on= 〜に光を当てる、〜を解明する手がかりを与える

The mysterious object, designated MoM-BH*-1, was identified by an international team analyzing high-resolution images from NASA's James Webb Space Telescope (JWST). Dating back to roughly 660 million years after the Big Bang, the object initially appeared as a hyper-luminous red dot. Subsequent measurements revealed an astounding anomaly: while its structural appearance resembles an immense star, it releases over 100 billion times more energy than any conventional star can produce—an energy output far more characteristic of black holes.

far more characteristic of= 〜の典型的な特徴である、〜により特徴づけられる

According to computer simulations, MoM-BH*-1 is not powered by nuclear fusion like ordinary stars. Instead, it is a giant black hole encased in extremely dense clouds of surrounding gas, which absorb and re-emit the immense gravitational energy as brilliant, reddish light. Dr. Rohan Naidu of the Kavli Institute for Astrophysics and Space Research at MIT explained that the object shines with the energetic fury of a black hole while exhibiting the classic spectral signatures of a giant star.

powered by= 〜を動力源とする、〜によって駆動される

This discovery provides a compelling explanation for scores of mysterious "Little Red Dots" that have intrigued scientists across JWST deep-space observations. Researchers suspect these black hole stars represent an early, swaddled phase of supermassive black holes—the very seeds that later anchored major galaxies, including our own Milky Way, and dictated the cosmic conditions for star and planet formation.

scores of= 多数の、数多くの

学習ノート

表現パターン

パターン意味
shed light on〜に光を当てる、〜を解明する手がかりを与える
far more characteristic of〜の典型的な特徴である、〜により特徴づけられる
powered by〜を動力源とする、〜によって駆動される
scores of多数の、数多くの

語彙

レベル意味
lurkingB2(暗闇や遠方に)潜んでいる、隠れている
breakthroughB2画期的な発見、飛躍的進歩
encasedB2(〜に)包まれた、覆われた
anomalyC1異常、特異な現象
swaddledC1(層や布で)固く包まれた、包まれた状態の

言語メモ

  • 「Little Red Dots(小さな赤い点)」は、JWSTが初期宇宙で発見した謎の赤い点状天体の通称であり、超大質量ブラックホールの初期段階である可能性が注目されています。
  • 「ブラックホール・スター」は、高密度のガス雲に包まれたブラックホールが星のようなスペクトルを示す、初期宇宙特有の天体フェーズを示唆しています。

練習

読んだ内容を確認しましょう。

  1. The  , detailed in the journal *Nature*, sheds light on a missing link in how the early universe gave birth to supermassive black holes and shaped the structure of modern galaxies.

  2. What energy source powers the newly discovered 'black hole star' MoM-BH*-1?

  3. What does the phrase 'shed light on' mean in this context?

Source: The Guardian Science