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 are studying black holes and still do not fully understand their phenomena. Black holes are not holes, but rather huge concentrations of matter packed into very small spaces. The surface of a black hole is called the event horizon. This surface is not like the surface of the Earth or the sun. The event horizon is a boundary that contains all the matter that makes up the black hole. Because the black hole is so dense, the gravity just below its surface, the event horizon, becomes strong enough that nothing, not even light, can escape through it.
Is your type tall (maybe even “super massive”), dark and mysterious? Celebrate #BlackHoleWeek with us!
Learn about these cosmic objects, share scientific updates, visualizations and sonifications. Continue @NASAUniverse and let yourself go: https://t.co/6fYorGK8rd pic.twitter.com/rS1vDyO1Eq
— NASA (@NASA)
May 1, 2023
NASA Black Hole Week 2023: May 1-5, 2023
Image source: NASA
According to data shared by NASA, there are likely tens of millions of black holes spread across the Milky Way. However, so far we have only identified a few dozen. Those that have been discovered are usually paired with a star that interacts in a way that reveals the presence of the black hole in the universe. So NASA will be sharing images of hidden black holes all this week. Black Hole Week was established in 2019 by NASA to study black holes in more depth on social media.
welcome to #BlackHoleWeek! Most galaxies, like our Milky Way, have black holes at their centers. This computer simulated image shows what that might look like. At the center is the black hole’s event horizon, from which no light can escape. https://t.co/mayS4A7WiA pic.twitter.com/yKmPvuLB7w
— NASA Exoplanets (@NASAExoplanets)
May 1, 2023
Black Hole Facts
Here are some interesting facts about black holes:
|
Characteristics |
Facts |
|
Closest |
The closest known black hole, called 1A 06200-00, is 3,000 light years away. |
|
Farthest |
The most distant black hole detected, at the center of a galaxy called QSO J0313-1806, is about 13 billion light years away. |
|
Larger |
The most massive black hole observed, TON 618, tips the scales at 66 billion times the mass of the Sun. |
|
tiny |
The lightest known black hole is only 3.8 times the mass of the Sun. It is paired with a star. |
|
spaghettification |
An actual term that describes what happens when matter gets too close to a black hole. It is squeezed horizontally and stretched vertically, resembling a noodle. |
|
Spin |
All black holes spin. The fastest known, called GRS 1915+105, clocks more than 1,000 rotations per second. |
|
Particle accelerators |
The monstrous black holes at the centers of galaxies can launch particles at speeds close to the speed of light. |
|
The gravity is the same. |
If the Sun were replaced by a black hole of the same mass, the solar system would cool greatly, but the planets would remain in their orbits. |
|
Star Booms |
This type of black hole is born when massive stars run out of fuel and explode in supernovae. |
|
not so strange |
Most Milky Way-sized galaxies have monstrous black holes at their centers. Ours is called Sagittarius A* (pronounced ey-star) and is 4 million times the mass of the Sun. |
How to find a black hole?
Because black holes neither emit nor reflect light, they are invisible to telescopes. Scientists detect and study black holes based primarily on how they affect their environment. NASA shared the four ways to detect a black hole:
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 intense gravity of a supermassive black hole can cause stars to orbit around it in a particular way.
3. When massive objects accelerate through space, they create waves in the fabric of space-time called gravitational waves. Scientists can detect some of these by the effect of waves on detectors.
4. Massive objects like black holes can bend and distort light from more distant objects. This effect, called gravitational lensing, can be used to find isolated black holes that would otherwise be invisible.
Is #BlackHoleWeek, a special week where we celebrate black holes! We could talk about black holes every day, but we still have to cover the rest of the universe. So this is their time to shine… figuratively, of course, because black holes don’t emit light themselves. pic.twitter.com/lR9fn9eO4D
– NASA Universe (@NASAUniverse)
May 1, 2023
It’s a fact that there is a lot we don’t know about black holes, for example what matter looks like inside their event horizons. However, scientists have discovered a lot about black holes in recent decades. So if you are interested in black hole events, NASA Black Hole Week is just for you!
Categories: Optical Illusion
Source: ptivs2.edu.vn