At some point in everyone's life they look up into the sky and think to
themselves “I wonder what's out there.” Scientists at NASA have taken this a few
steps further. They have scoured the skies for hours on end in search of the
elusive creatures we refer to as black holes. Black holes come in a variety of
different sizes such as the small and super-massive. By now you may be thinking,
“Where are the medium sized black holes?” Well according to new data, found by
those same scientists that stare at the sky for hours, they do exist and in larger
numbers than expected.
First off, the small and medium sized stars in our universe produce most
black holes, so there must be a chance of medium sized black holes right.
NASA's leading
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(Properties of Black Holes) The size of these objects or
black holes can vary depending on the star that gave birth to it.
According to NASA, "new evidence... strengthens the case that two mid-
sized black holes exist close to the center of a nearby starburst galaxy.” In
previous years, only small and super massive black holes had been observed.
These mid-sized black holes are the window into exploring black holes, how
they're formed, and how they first came into our universe. Mid-size black holes,
while they seem irrelevant in nature are vital in the advancement of science. If we
can greater understand how these mid-sized black holes are formed then it will
blast a hole in the side of the wall that we call black hole theory.
Black holes are rather mysterious creatures, we rarely see them, but they
are always there. The first black hole that was discovered was Cygnus X-1. This
black hole was only an ordinary small size to us today, but back in 1970, it was
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The first evidence for these medium black holes came about when groups
of astronomers were looking over some old probe data. ("Survivor" Black Holes
May Be Mid-Sized) They came across some strange x-ray readings that lead to
them to discovering the first mid-sized black hole. It measured at about 428 solar
masses, or the mass of 428 suns.
The mass of a black hole is measured based on how much more dense it is
in comparison to our own sun, the center of our solar system. Small sized black
holes are usually about 3 times larger than our sun, and supermassive black holes
can be up to 12 billion times bigger than our sun. (Black Holes and Wormholes -
The Physics of the Universe) These Of Corse are the extremes of both sides
giving the widest look at just how big these universal entities actually are.
While small sized black holes are very small in size and supermassive
black holes are large in size mid-sized black holes are quite different. The first
black hole measured was about 428 times bigger than our sun. When this data is
compared with the data from the supermassive black holes, they seem a bit
Death by Black Hole: And Other Cosmic Quandaries explains about his ability to blend content, accessibility, and humor, Tyson is a natural teacher who simplifies some of the most complex concepts in astrophysics
The origins of the super-massive black holes which concludes how they were formed and what caused them to form is an unsolved problem which is yet a mystery of astrophysics. ( Millis 2014)
Black holes were originally thought to have only mere mathematical concepts. There was seemingly no possible way to compress any object into a space small enough to equal to its schwarzschild radius. Later however, astronomer Subrahmanyan Chandrasekhar calculated that stars much larger than our own sun should theoretically be able to collapse into a black hole (UTFC). A star is like a blown up balloon with the force of gravity trying to compress the balloon inwards and the air trying to push the balloon outwards. Likewise, stars are held in balance by gravity trying to collapse the star inwards going against the outwards pressure of the internal reactions of the star called nuclear fusion.
Starting with black holes, Khalili describes the creation of one. I found that a black hole is what remains when a massive star dies. Because stars are so massive and made out of gas, there is an intense gravitational field that is always trying to collapse the star. As the star dies, the nuclear fusion reactions stop because the fuel for these reactions gets burned up. At the same time, the star's gravity pulls material inward and compresses the core. As the core compresses, it heats up and eventually creates a supernova explosion in which the material and radiation blasts out into space. What remains is the highly compressed and extremely massive core. The core's gravity is so strong that even light cannot escape. This object is now a black hole and literally cannot be seen because of the absence of light. Because the core's gravity is so strong, the core sinks through the fabric of space-time, creating a hole in space-time. The core becomes the central part of the black hole called the singularity. The opening of the hole is called the event horizon. Khalili describes that there are two different kinds of black holes:
... For, even if one would see an alien or even just a spacecraft, it would not have enough credence to prove beyond another person’s quizzical denial. Hence, bringing me back to my original issue, if someone really did see this phenomena where are these other people? I believe we will never know the answer regarding extraterrestrials until there is a national revelation of some sort. Once again, the skeptics are left waiting for an answer.
Black holes - the strange scientific phenomenon that has astounded physicists and astronomers alike for decades. Popular subjects in science fiction novels, black holes are one of the greatest enigmas of the scientific world. Even today, the concept of a super-dense ball of matter that not even light can escape from is somewhat farfetched, and many scientists disagree with each other about nearly every aspect of a black hole. This project will attempt to shed some light on these mysterious formations, and will inform you the reader of the most popular and widely accepted theories surrounding them.
A Black Hole is defined as an object in space that is so compact, that has a gravitational pull so powerful, not even light can escape its pull. In most cases Black Holes are formed when a massive star (much larger than our own) undergoes a supernova explosion. When this happens, the star may collapse on its own gravitational pull, thus resulting in a an object with infinitely large density and zero volume. As a result, the escape velocity (the speed required to escape the gravitational pull) becomes even greater than the speed of light, and because nothing can travel faster than the speed of light, nothing can escape a black hole.
Every day we look into the night sky, wondering and dreaming what lies beyond our galaxy. Within our galaxy alone, there are millions upon millions of stars. This may be why it interests us to learn about all that we cannot see. Humans have known the existence of stars since they have had eyes, and see them as white glowing specks in the sky. The mystery lies beyond the white glowing specks we see but, in the things we cannot see in the night sky such as black holes.
The Sun is a huge, bright sphere that is mostly made up of gas that is about 5 billion years old. The Sun is the closest to the Earth, it is 145 million km distant (this distance is called an Astronomical Unit). The next closest star is 300,000 times further away. There are probably millions of similar stars in the Milky Way galaxy (and even more galaxies in the Universe), but the Sun is the most important to us because it supports life on Earth.
Black holes have been theorized since 1916. However, no scientist has ever discovered a black hole in certainty. In theory, A black hole is created when a star of three or more solar masses collapses. “One solar mass is equal to the mass of the sun,” (Mclintock 1). A star collapses when the outward push of the combustion reaction no longer has the required forces compete with the inward pull of gravity. Most astronomers believe that the Milky Way contains millions of theses invisible devils, which are massive stars that have collapsed. In theory, anything could become a black hole if it were simply compressed into its Schwarzschild radius. For instance, Mount Everest has a Schwarzschild radius that is less than a nanometer, but there is “no known way to compress an object like Mount Everest into it’s Schwarzschild radius,” (Vsauce 1:05). Black holes also have a radius that is referred to as the event radius. The event radius which is used to measure the size of a black hole is normally reported in kilometers. Because of the fact that black holes are impossible to see or even to touch, most scientists refer to black holes and science fiction. However, black holes should no longer be thought of as science fiction due to the arguments concerning their signs, their ability to be orbited by heavenly bodies, and what happens when matter crosses into one.
When you look up the sky all you see is a blue sky or maybe a moon and stars, but Consolations makes the audience think twice. What if the biggest problems we all have weren’t even a deal in another universe? What if the universe we live in is just one out of all the other universes we leave out? Now look up
Black holes are the result of the death of a massive star, leaving behind a dense remnant core that eventually collapses to create a gravitational force so strong that nothing, including light, can escape the force. The theory that black holes existed started back in the early 1900s and since then astronomers and scientists have been trying to get a better understanding of them. This phenomenon has been a working progress for astronomers and scientists for many years and as we develop a better understanding of our solar system, the more likely it is to make a significant discovery that can answer some of the most difficult questions about our incredible galaxy and solar system. The more information we are able to acquire about our universe, the more questions we might be able to answer about our existence. With advancements in technology we may be able to see some significant discoveries and insights into the world of black holes.
Black holes happen when a star with a great mass dies and becomes a supernova. The star couldn’t handle the energy so it explodes. There is still a lot of things we don’t know about black holes. Black holes have such a strong gravitational pull that nothing can escape it, not even light so black holes are completely invisible but, scientist are able to see how they affect planets around them with special telescopes and are able to find them. Black holes can be any size, the smallest is the size of an atom with the mass of a large mountain and the largest has a mass equivalent to 17 billion suns. Everyone thinks that anything that gets close to a black hole will get sucked up nut, in reality the majority of things don’t, a lot of it just ends
What is a black hole? How are black holes formed? And who first discovered black holes? Are all excellent questions that will be answered in this research document. However, before you are fed information on the history of black holes, you must first know the definition: A black hole is a region of space having a gravitational pull so intense that matter or light can escape. Black holes can be classified into 3 three categories based on their method of creation and size. These types are called: stellar, supermassive, and miniature black holes.