NASA celebrates Black Hole Week 2023: NASA celebrates Black Hole Week from May 1 to 5, 2023. Black holes are considered the most mysterious cosmic objects in the universe. Many scientists and space organizations study black holes but still do not fully understand their phenomena. A black hole is not a hole but a concentration of a lot of matter packed into a very small space. The surface of the black hole is called the event horizon. This surface is not like the surface of the Earth or the Sun. The event horizon is the boundary containing all the matter that makes up a black hole. Because the black hole is so dense, the gravitational pull just below its surface, the event horizon, becomes strong enough that nothing, not even light, can escape it.
Is your type tall (maybe even “super big”), dark, and mysterious? Memory #blackholeweek with us!
Learn more about these cosmic objects, share scientific updates, visualizations and audiovisuals. screen @NASAUniverzum and tune: https://t.co/6fYorGK8rd pic.twitter.com/rS1vDyO1Eq
– NASA (@NASA)May 1, 2023
NASA Black Hole Week 2023: May 1-5, 2023
Photo source: NASA
According to data shared by NASA, there may be tens of millions of black holes around the Milky Way. However, so far we have only identified a few dozen. The stars discovered are often paired with an interacting star in a way that reveals the presence of black holes in the universe. So NASA will be sharing images of hidden black holes throughout the week. Black Hole Week was established by NASA in 2019 to take a closer look at black holes on social media.
Welcome #blackholeweek! Most galaxies, like our Milky Way, have a black hole at their center. This computer simulation shows what it would look like. At the center is the event horizon of a black hole, from which light cannot escape. https://t.co/mayS4A7WiA pic.twitter.com/yKmPvuLB7w
– NASA Exoplanets (@NASAExoplanet)May 1, 2023
black hole of truth
Here are some interesting facts about black holes:
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Featured |
truth |
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Nearest |
The closest known black hole, named 1A 06200-00, is 3,000 light-years away. |
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furthest |
The most distant black hole discovered is located in the center of a galaxy called QSO J0313-1806, about 13 billion light years away. |
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The biggest |
The largest observed black hole, TON 618, has a mass 66 billion times that of the Sun. |
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At least |
The lightest known black hole is only 3.8 times the mass of the Sun. It is paired with a star. |
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Spaghetti |
A term that actually describes what happens when matter gets too close to a black hole. It is compressed horizontally and stretched vertically, like noodles. |
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Turn |
All black holes are rotating. The fastest known – called the GRS 1915+105 – operates at more than 1000 rpm. |
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particle accelerator |
Massive black holes at the centers of galaxies can eject particles at speeds close to the speed of light. |
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Gravity is the same |
If you replace the Sun with a black hole of the same mass, the Solar System will become much cooler, but the planets will remain in their orbits. |
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oak star |
This type of black hole is formed when massive stars run out of fuel and explode in supernovae. |
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Not so rare |
Most galaxies the size of the Milky Way have giant black holes at their centers. Our star is called Sagittarius A* (pronounced ey-star) and it has 4 million times the mass of the Sun. |
How to find a black hole?
Because black holes do not emit or reflect light, they cannot be seen with a telescope. Scientists discover and study black holes mainly based on their impact on the environment. NASA shared four ways to detect black holes:
1. Black holes can be surrounded by rings of gas and dust, called accretion disks, that emit light at many wavelengths, including X-rays.
2. The extremely strong gravity of a supermassive black hole can cause stars to orbit it in a certain direction.
3. When massive objects accelerate through space, they create ripples in the fabric of space-time called gravitational waves. Scientists were able to detect some of them thanks to the impact of waves on the detector.
4. Massive objects such as black holes can bend and distort the light of more distant objects. This effect, called gravitational lensing, can be used to find isolated black holes that are otherwise invisible.
That is #blackholeweek, a special week where we celebrate black holes! We can talk about black holes every day but we still have the rest of the universe to study. So it’s their time to shine… figuratively of course, since black holes don’t emit light themselves. pic.twitter.com/lR9fn9eO4D
– NASA Space (@NASAUniverse)May 1, 2023
In fact, there’s a lot we don’t know about black holes, such as what matter looks like inside their event horizons. However, scientists have discovered a lot about black holes over the past few decades. So if you are interested in black hole events then NASA Black Hole Week is for you!
Category: Trends Source: newstars.edu.vn