Nguồn ảnh: Dự án Kính thiên văn Chân trời sự kiện (Event Horizon Telescope).

Thông tin thêm:

Các lỗ đen trong vũ trụ không tồn tại mãi mãi, chúng dần mất đi khối lượng thông qua “bức xạ Hawking”. Tuy nhiên, quá trình này mất rất rất rất rất rất x 3.14 nhiều thời gian, lâu đến nỗi khi lỗ đen cuối cùng bốc hơi đi, sự sống trong vũ trụ có thể đã biến mất từ rất lâu về trước.

Nguồn thông tin: Wikipedia, Kurzgesagt In-a-nutshell, “THE UNIVERSE IN A NUTSHELL” – Stephen Hawking.

“PER ASPERA AD ASTRA”

THROUGH HARDSHIPS TO THE STARS

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BLACK HOLE - AN EVERLASTING MYSTERY OF SPACE

·        What is "black hole" ?

Contradicting to our way of perceiving "holes" as holes, Black Hole isn't just a hole, or a sphere that eventually sucks up everything inside. Black Hole is, in fact, a region of spacetime where gravity is so strong that nothing - no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. As a relevant, pictures that we have seen about black holes we usually see is the "event horizon" of the Black hole, NOT the Black Hole itself. Inside the event horizon existed a space-time singularity, where concentrates the whole mass of the black hole which made scientists to believe the area comprises an everlasting densed matters. However, what appear to be inside the event horizon can be different from what we human perceived as it exceeds our knowledge at the moment.

·        How a black hole is formed 

- Stars like our sun produces energy solely by a reaction deep inside the core of the star - nuclear fusion. This is the reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons). This specific energy repel against the gravitational force of the star. Big and heavy stars, the temperature and pressure inside core allow the reaction (nuclear fusion) to produce heavier atoms. In contrast to the lighter atoms, these heavy atoms (usually irons) can't produce energy while in the reaction, causing the balance between the radiation energy and the gravitational force to be broken. Right at this moment, in a short time, under the gravitational force, the core collapses and 1 in the 2 events might occur: 

1/ If the pressure inside the star's big enough to repel the collapse, a supernova starts, leaving behind a neutron star and the matters left will turn into a nebula.

2/ If the pressure is not big enough, all of its matters will be forced into the center of the star, forming a black hole.

·        What happen if we accidentally fall into a black hole ?

The gravitational field around the black hole is so strong that it curves space, and dilate time. From an outsider’s perspective, you will be seen moving towards the event horizon, slowing down gradually, then almost stop completely. From your point wof view, the gravitational force from the black hole will affect your evesxry body parts, every cells; the closer that part is to the centre, the stronger the force. Eventually, you will be spaghettified, in other words, you die. But, again, no one really knows what will happen, since every person who decided to jump into a black hole never wanted to go back :D!

·        Extra information

Black holes do not last forever, they are slowly losing mass through Hawking radiation. However, this process is extremely time consuming, it is so slow that when the last black hole had evaporated, the universe could have become inhabitable a long time ago.