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## Unveiling the Mysteries of Black Holes: A Journey into the Unknown with NASA’s Latest Revelations

Updated Dec 28, 2023, 03:56 PM IST

Explore the mysteries of black holes with NASA’s revelations. Far from empty, these cosmic wonders result from massive stars’ dramatic deaths, forming dense cores with gravitational forces so intense that not even light escapes. Recent discoveries challenge beliefs about black hole sizes, adding new dimensions to our understanding of these celestial wonder.

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Do you ever wonder – what’s inside a black hole? Despite their name, black holes are not empty voids but rather tightly packed with an immense amount of matter that results in an immensely strong gravitational pull that nothing, not even light, can escape.

How Are Black Holes Formed?

The concept of black holes was predicted in Albert Einstein’s theory of general relativity that explains black holes form when a massive star dies, leaving behind a small, dense core. If that core’s mass exceeds three times that of our Sun, gravity dominates, giving birth to a black hole.

How Do We Detect Black Holes?

Despite their significance, black holes remain elusive, escaping direct observation with traditional telescopes. Instead, scientists detect their presence by observing their influence on nearby matter. When a black hole interacts with interstellar clouds or a normal star, it triggers accretion ÔÇô a process where matter is drawn inward, emitting x-rays, gamma ray bursts, and even leading to the destruction of nearby stars.

Life and Death of Black Holes

Most black holes emerge from the remnants of large stars that meet a dramatic end in a supernova explosion. However, even more colossal black holes can form from stellar collisions. Imagine the cosmic ballet of a black hole and a neutron star colliding, giving rise to another black hole. Black holes can be of various sizes. “Stellar mass” black holes, remnants of massive stars, are generally 10 to 24 times more massive than the Sun, scattered across the Universe. On the other end, giants ÔÇô “supermassive” black holes, millions or billions of times more massive than our Sun, are believed to reside at the centers of large galaxies.

Black Holes – The Mysterious Entities

So, the next time you wonder about black holes, remember they are not empty voids but dynamic, mysterious entities influencing their cosmic neighborhoods. What is a black hole, and why is it called “black”? A black hole is a region in space where gravity is so intense that nothing, not even light, can escape. It’s called “black” because it doesn’t emit any visible light that we can detect.

How do scientists study black holes if they can’t be directly observed?

When a black hole interacts with interstellar clouds or other celestial bodies, it triggers processes like accretion, emitting detectable signals such as x-rays and gamma ray bursts. That’s how scientists infer the presence of a black hole. What happens inside a black hole? The gravitational forces inside black hole are so intense that they cause time and space to behave unusually. Once something crosses the event horizon, it’s believed to be lost forever. The exact nature of what happens beyond this point remains one of the greatest mysteries in astrophysics.

Do black holes come in different sizes?

Yes, black holes come in various sizes. “Stellar mass” black holes, formed from the remnants of massive stars, are generally 10 to 24 times more massive than the Sun. In contrast, “supermassive” black holes, believed to reside at the centers of galaxies, can be millions or even billions of times more massive.

Can a black hole destroy the entire universe?

No, a black hole cannot destroy the entire universe. Their influence is limited to their immediate vicinity, and they play a crucial role in the life cycles of galaxies, influencing star formation and other cosmic processes. (With Inputs From NASA Blog)

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