05.01 - 블랙홀로 향한 여정(Journey into a Black Hole)

05.01 - 블랙홀로 향한 여정(Journey into a Black Hole) [커세라 페이지]

Black holes are common element in many science fiction movies and TV shows. In the 2014 movie, Interstellar, the fictional crew of the spacecraft, Endurance, visits a super massive black hole called Gargantua.

Similarly, in Disney's 1979 film, The Black Hole, the crew of the spaceship, Cygnus, plunges into a black hole.

In this module, we will approach the nearby stellar mass black hole, only 6,00 light years away known as Cygnus X-1. From a safe distance, we'll make our way towards its event horizon. Along the way, we will make observations, examining some of the major structures that are common in the environment around the black hole.

이번 강의는 지구에서 가장 가까운 항성 질량급 블랙홀로 6천광년 밖에 떨어지지 않은 시그너스 X-1 에 다가가 보기로 한다. 안전을 위해 사건의 지평선 밖에서 이 블랙홀을 관측해 보자. 블랙홀의 주요 구조와 블랙홀을 둘러싼 공통적인 주변 환경을 살펴보자.

Our journey will finish at the inner edge of the black hole's accretion disk teetering in the closest stable orbit around Cygnus X-1.

우리의 여정은 블랙홀의 강착 원반의 가장 안쪽 끝에서 끝난다. 시그너스 X-1 을 둘러싼 안정된 궤도중 가장 안쪽이다.

In module six and seven, we will plunge past the inner edge of the black hole's accretion disk to gaze upon Cygnus X-1's event horizon, exploring the latest theories and predictions about what a black hole's interior might be like.

Is Cygnus X-1 hiding a worm hole ?

Or is there a destructive singularity lurking at its core?

From our vantage point here on Earth, Cygnus X-1 appears in the constellation of Cygnus, the Swan. One of my favorites because it's visible on summer nights in the Northern hemisphere.

Cygnus X-1 was the first confirmed black hole. Canadian astronomer, Tom Bolton, stated, "It is inevitable that we should also speculate that this might be a black hole."

Cygnus X-1's status as a black hole was confirmed in 1974. 

Through a telescope, the stellar companion of Cygnus X-1 is a faint source of light along the neck of the Swan.

But a closer x-ray examination of Cygnus X-1 reveals a bright X-ray source originating from the system. What is creating all of this X-ray light?

Closer to the black hole is a pancake-like feature called the accretion disk. This squashed donut ring of material is the food that is feeding the black hole.

So, I hope you aren't too hungry. I know Ross is.

As we continue our approach, we will encounter firsthand some of the strange effects produced by the extreme gravity of Cygnus X-1. Friction, tidal forces, and gravitational effects make this journey extremely dangerous. What dangers can you identify and how close to a black hole do you think it would be safe for an astronaut to approach?

블랙홀에 접근해 갈수록 시그너스 X-1의 엄청난 중력이 만들어내는 기이한 현상에 직면하게 될 것이다. 마찰, 조석력 그리고 중력이 만드는 효과로 블랙홀로 향한 여정은 엄청나게 위험해진다. 그 위험의 정체를 밝혀낼 수 있을까? 우주 비행사가 안전할 거리는 어디까지 일까?

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