BLACK HOLES⚫

-

 What is a Black Hole? 

A black hole is a place in space where gravity pulls so much that even light cannot get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying. Because no light can get out people can't see black holes. They are invisible. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently than other stars. 



Different Types Of Black Holes.

Black holes can come in a range of sizes, but there are three main types of black holes. The black hole's mass and size determine what kind it is. Black Holes are of following types:
1. Premordial Black Holes
2. Stellar
3. Super Massive

Buy at best deals:



These Black Holes are explained below:

1. Premordial Black Holes

The smallest ones are known as Premordial  Black Holes. Scientist believe this type of Black hole is as small as a single atom but with the mass of a large mountain.




2. Stellar

The most common type of medium-sized Black Holes is called "Stellar". The mass of a Stellar black hole can be up to 20 times greater than the mass of the sun and can fit inside a ball with a diameter of about 10 miles. Dozens of Stellar mass Black Holes may exist within the Milky Way Galaxy.



3. Super Massive 

The largest of the Black Holes are known as "Super Massive" Black Holes. Scientific evidence shows that in the centre of the Milky Way is a Super Massive Black Hole. These black holes have masses greater than 1 million suns combined and would fit inside a ball with the diameter about the size of the solar system. Scientific evidence suggest that every large galaxy contains a supermassive black hole at its centre. The supermassive black hole at the centre of the Milky Way galaxy is called Sagittarius A. It has a mass equal to about 4 million sons and would fit inside a ball with a diameter about the size of the Sun.


Buy kitchen and home appliances at beat deals; click here 


How Do Black Holes Form?

A common type of Black hole is produced by certain dying stars. A star with the mass greater than about 20 times the mass of our Sun may produce a Black Hole at the end of its life. In the normal life of a star there is a constant tug of war between gravity pulling in and pressure pushing out. Nuclear reactions in the core of the star produce enough energy and pressure to push outward. For most of star's life, gravity and pressure balance each other exactly, and so the star stable. However, when a star runs out of nuclear fuel, gravity gets The upper hand and the material in the core is compressed even further. The more massive the core of the star, the greater the force of gravity that compresses the material, collapsing it under its own weight.

• Premordial Black Holes are thought to have formed in early Universe, soon after the Big Bang.
• Stellar black holes form when the centre of a very message star collapses in upon itself. This collapse also causes a supernova, or an exploding star, that blasts part of the star into space.
• Scientist things supermassive black holes formed at the same time as the galaxy they are in. The size of the super massive Black Hole is related to the size and mass of the galaxy it is in.

How to do fitness test for senior citizens, click here:   Get Fit

Top 5 games available in mobiles for free
Click here:.    Daily Gaming   

THANK YOU.


Comments

Post a Comment

Popular posts

LIFE CYCLE OF A STAR!

-
Image
Outlined below are the many steps involved in a stars evolution, from its formation in nebula, to its death as a white dwarf or neutron star. NEBULA A Nebula is a cloud of gas(hydrogen) and dust in space. Nebulae are the birth places of stars. There are different types of nebula. An emission nebula e.g. such as Orion nebula, glows brightly because the gas in it is energized by the stars that have already formed within it. In a Reflection Nebula, starlight reflects on the grains of dust in a nebula. The nebula surrounding the Pleiades Cluster is typical of a reflection nebula. Dark Nebula also exist. These are dense clouds of molecular hydrogen which partially or completely absorb the light from the stars behind them e.g. the Horsehead nebula in Orion. Planetary Nebula are the outer layers of a star that are lost when the star changes from a red giant to a white dwarf.   Shop now at Amazon Pantry at best deals Amazon Pantry STAR A star is a luminous globe of gas producing its own heat a
Read more

GRAVITY

-
Image
GRAVITY What is Space Time Continuum? Time is not completely separate from and independent of space, but is combined with it to form an object called space-time. It is a matter of common experience that one can describe the position of a point in space by three numbers, or coordinates. For instance, one can say that a point in a room is 7 feet from 1 wall, 3 feet from another and 5 feet above the floor. Or one could specify that a point was at a certain latitude and longitude and a certain height above sea level. One would not specify the position of the moon in terms of kilometres north and kilometres west of a building on Earth and some feet above sea level. Instead, one might describe it in terms of distance from the Sun, distance from the plane of the orbits of the planets, and the angle between the line joining the Moon to the Sun and the line joining the Sun to a nearby star such as Alpha Centauri. Even these coordinates would not be of much use in describing the position of the
Read more

THE SOLAR SYSTEM

-
Image
Here are some amazing elements that our SOLAR SYSTEM consists.  1. Sun The Sun is a star present at the centre of the Solar System. It is spherical in shape and is emmiting huge amount of light and infrared radiations with heat due to the nuclear fusion reactions in its core. It is a type of G-Typemain Sequence Star with a life span of approximately 10 billion years.  2. Planets Our Solar System consists of eight planets named Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, ordered in their respective distances from the Sun.  The smallest and the nearest planet to the is Mercury and the largest planet is Jupiter. The hottest planet is Venus and the coldest is Neptune. Listed below is the time taken by every planet to rotate around its Axis and revolve around the Sun. Planet             Rotation              Revolution    1. Mercury.    58d 15h 30m           88d 2.Venus.          116d 18h                  225d 3. Earth.          23h 56m                   365d 4. Mars. 
Read more

CRAZY SCIENCE EXPERIMENTS IN SPACE SHUTTLE

-
Image
Outlined below are some of the coolest Space Shuttle Science Experiments: 1. Microbes Get More Virulent In Microgravity. Experiments aboard the space shuttle have shown that salmonella bacteria, a   common and sometimes deadly source of food poisoning, get more virulent in space. Scientist believe that the bacteria get ramped up because space flight tricks them into behaving as if they're inside the human gut. The shuttle missions also identified dozens of genes that seem to be involved in the hyper-virulence, as well as "master switch" protein that regulates many of these genes.  2. Space Roses Smell Different. It sounds like some sort of symbolic or ceremonial gesture: The Shuttle Discovery carried a single rose to orbit on its STS-95 mission in 1998. But there was science, and business, behind the move. The company International Flavours and Fragrances (IFF) wanted to see how microgravity altered the sweet and familiar scent of a Rose — and if a new perfume component m
Read more

NASA FOUND SALT TRACES ON MARS...

-
Image
Recently, after the testing of the samples brought from the Red Planet (Mars), NASA said that there are some possibilities of organic salt present on Mars. After this research of NASA our understanding of Mars's surface will improve. Also this will help in finding life forms in Mars as well as on different Planets. In an interview NASA said that organic compound and salt traces on Mars could be a mark of geographical processes or bacterias, like that of found by the Curiosity Rover. Salts Could Be Made from Geological Processes..... According to one research, the iron, calcium and magnesium oxalate and acetate affected by radiation and oxidation together can combine to mix up with the organic salts. These salts could be made from Geological Processes or these are the remains of micro organisms. Possibilities Of Life On Red Planet Increases.... According to NASA traces of salt could increase the possibility of organic matter present on Mars. On Earth as well such type of life forms
Read more