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Black Holes — What They Are and How We Photographed One

International Science · Page 블랙홀이란

한국어 English

A black hole is an object whose gravity is strong enough that not even light escapes. The boundary beyond which light cannot escape is called the event horizon. In April 2019 the Event Horizon Telescope collaboration released the first image of a black hole, at the centre of the galaxy M87.

Verified facts

  • A black hole is defined as an object whose gravitational pull is strong enough that not even light can escape.
  • The event horizon is the boundary beyond which light can no longer escape the black hole.
  • In April 2019 the Event Horizon Telescope collaboration published the first image of a black hole, located at the centre of the galaxy M87.

Timeline

  1. Apr 2019Event Horizon Telescope releases the first image of a black hole (M87).

Frequently asked

What is the event horizon?

The boundary around a black hole beyond which light cannot escape. It is not a physical surface — it marks the point of no return.

How was a black hole photographed if light cannot escape?

The image does not show the black hole itself but the bright ring of material around it, silhouetted against the dark shadow cast by the event horizon.

Which black hole was imaged first?

The one at the centre of the galaxy M87, released by the Event Horizon Telescope collaboration in April 2019.

Sources

Source titles are kept in their original language
  1. 1 블랙홀 — 위키백과
  2. 2 M87 블랙홀 편광 관측을 통해 물질을 빨아들이고 내뱉는 과정 밝히다 — 한국천문연구원 (공식 보도자료) primary
  3. 3 인류 첫 블랙홀 관측의 일등공신 EHT, 그리고 중력파와 사건의 지평선 — 경희대학교 연구실 자료
  4. 4 모습 드러낸 블랙홀 주변의 자기장 — MIT 테크놀로지 리뷰 코리아
  5. 5 역대 최고 해상도로 'M87* 블랙홀' 관측 성공 — 네이트 뉴스 (연합)
  6. 6 Astronomers Capture First Image of a Black Hole (EHT 최초 관측 공식 발표) — ESO 유럽남방천문대 (원출처, 영문) primary

This English edition covers the verified facts and sourced claims. The full document — with sentence-level source references, timeline, FAQ and the complete revision history — is maintained in the Korean edition.