Showing posts with label Astrophysics. Show all posts
Showing posts with label Astrophysics. Show all posts

20.2.24

Carlo Rovelli Has Once Again Taken Me Along For The Ride



White Holes - Carlo Rovelli (2023)


I have admired so many great thinkers, imagining how it must have been for contemporary readers of Goethe, Homer, Nietzsche, etc.  To share in the intimate thoughts of those at the cutting edge of abstract human exploration (Literature, Philosophy, Science, Arts) as they themselves first share them with the world at large seems to me one of the rarest glories that life may afford for a layperson such as myself, in love with science and human exploration.  Reading the work of Carlo Rovelli I find myself exactly where I imagined decades ago, with open ears and mind, receiving original ideas from someone on the leading edge of abstract thought, ideas which will alter everything moving forward.  I feel so fortunate.

(I must mention here that Mr. Rovelli is Italian, and writes in his native language.  I feel a great debt owed to the translator of this book, Simon Carnell.  He managed to convey both the facts and the subtle meanings in a wonderful way.)

Carlo Rovelli is a theoretical physicist, and one of the most original thinkers.  He is gifted not only with the ability to grasp and calculate abstract mathematics and physical theory, but he writes like a poet, explaining the science with the same fervor with which he explains his personal mode of work.  He not only loves ideas, and exploring them as far as possible, but he loves the process by which he develops his ideas.  The joy he finds in work that, to many, may seem like mathematical drudgeries and theoretical mazes, is readily apparent.  I felt his joy and wonderment as his conclusions led to new questions, and eventually to the idea that a black hole does not "die" but is instead, reborn as a "white" hole.  

Thirty years ago, black holes were barely an accepted theoretical idea.  Today, there are hundreds, if not thousands, of them catalogued in visible space, with nearly every galaxy containing a massive black hole at its center.  Physicists sought to understand the "life cycle" of a black hole, much like they studied the life cycle of stars.  Many assumed that a black hole was a permanent null void in space, while others, such as Stephen Hawking, surmised that through natural quantum effects, the black holes would slowly "evaporate" away.  Evidence of these processes has been found.   These became the consensus on black holes.

Mr. Rovelli's genius lies not only in the real of physical science, but in the much-admired (by me) and often lacking skill that is pure abstract thought.  It is in abstract thought that the human mind achieves greatness.  This place is where intuition, knowledge, and the magic of consciousness combine to create the truly new ideas.  From the first human to note that fire made the clay underneath hard and sturdy, thereby intuiting that shaping the clay while wet and then placing it in the fire she could create a vessel or bowl, to Albert Einstein discovering the relativity of time while pondering the way train stations miles apart managed to keep track of departures and arrivals, this mind abstraction has shaped all of humanity.  It is in this realm that Carlo Rovelli realized a black hole does not need to evaporate or die, since quantum effects prevented the actual formation of a singularity, always assumed to reside inside all black holes.  Instead, Rovelli grasped that the gravity pit would bounce back, in a sense, and that the black hole would become a "white hole," an object that spews matter and energy out of itself into the universe at large, without ever becoming a singularity.  This is a BIG idea, and the hard part was yet to come.

Many non-scientists assume that the job of physicist is to come up with ideas.  That is only the very start of the process.  The work comes in using rigorous mathematics to test the ideas over and over again, looking for any and all possibility of error, assumption, and misunderstanding.  One must also look into any previous work that may have analyzed the same phenomenon.  It can take a lifetime to properly verify that a physical theory stands up.  It is now 2024 and we still run experiments testing the theories Einstein crafted one hundred years ago.  THEY HOLD UP! My favorite sections of this book are when Rovelli describes the joy he feels when the mathematics consistently work in his idea's favor.  What the Universe does not allow will not happen. The joy of discovery is a pure one, and rarely described so beautifully.

I am fortunate to find myself here, with Carlo Rovelli, at the start of his journey.  I expect he will explore white holes and every new possibility they may bring.  I will be right there with him, receiving periodic updates hopefully, as he continues his foray into the unknown, leading the charge for the rest of us.  I highly recommend this book. 

(White Holes can be purchased here: https://www.penguinrandomhouse.com/books/724426/white-holes-by-carlo-rovelli/ )


6.4.23

Lawrence M. Krauss Shares How Far We Have Come, and How Much Further We Have To Go

 


The Known Unknowns: The Unsolved Mysteries of the Cosmos – Lawrence M. Krauss (2023)

 

            If I could define myself with just one word, it would be “reader.”  Everything in my life either stems from, or draws from, the many books I have read in my 49+ years on this planet Earth.  My biggest heroes, Kurt Vonnegut, Robert Anton Wilson, Richard P. Feynman, etc., came into my life through the written page.  When I began RXTT’s Book Journey almost ten years ago, I dreamed of the possibility that book publishers and authors would appreciate my reviews and want to share their soon-to-be-released work with me.  Dreams do come true.

            The latest advance copy received by the RXTT household is physicist Lawrence M. Krauss’ forthcoming book, The Known Unknowns. (That is the UK title.  The book will be titled The Edge of Knowledge in the USA, probably because Donald Rumsfeld’s use of the phrase “known unknowns” became such a joke in ignorant America.)  After requesting it from Mr. Krauss himself, he contacted his publisher on my behalf and I was sent the book.  MIND BLOWN.

            The reason I read is to enlighten myself, both with new ideas and new information, for I am a curious mind.  Sometimes, the most useful and valuable books are not the ones with the most data, but instead the books with the best questions.  One such book, among many faves, is Richard Feynman’s The Character of Physical Law, a book full of ideas and questions which, it turns out, was also a guiding light for Lawrence M. Krauss.  Feynman’s spirit, willing to share ideas in a thoughtful manner, directly engaged with the toughest questions, and able to explain the most obtuse scientific thought in a manner where a layperson can grasp the fundamentals, is alive and well in Mr. Krauss.  We are all very fortunate.

            Krauss divides this book into five chapters, each one concerning itself with a specific topic where science has shed some light, but where there are still far more questions than answers.  Time, Space, Matter, Life, and Consciousness are the guideposts for Lawrence M. Krauss to not only sum up our current knowledge, but to also point out the vast gaps.  Our collective ignorance is the greatest impetus towards science, scientific discovery, and new knowledge.  The very worst of humanity arises when humans feel absolute certainty, whether political, religious, or social.  Not knowing is the greatest gift to an inquisitive mind.

            My biggest surprise as I devoured this book was its readability.  There are many amazing minds in the world of science, and physics specifically, but very few have the ability to provide us their thoughts and knowledge in such a fun and engrossing manner.  Some books, even great ones, can be a chore to read.  Lawrence M. Krauss has succeeded in creating a book that will enlighten young and old alike, while also opening up their minds to the myriad possibilities yet available for exploration and research.  This may be this book’s most valuable contribution, sparking the mind of some young students out there, and starting their paths toward new discoveries, new fields of research, and, hopefully, new questions.  Questions are truly important.  Anyone claiming to have all the answers is trying to rip you off, and should be treated accordingly.

            Each chapter begins with questions.  For example, the chapter titled Matter starts with these:

What is the World Made of?

How Many Forces are there? 

Is Anything Fundamental?

Is Quantum Mechanics True? 

Will Physics Have an End?

Will Matter End?

Krauss perfectly encapsulates our current state of knowledge in each chapter, sharing it with the reader through the specific details of past scientific achievement.  He then explores how we came to find that knowledge, use it, and seek to understand the underlying principles involved.  One of the best attributes of scientists is their humility in the face of new data.  It allows for self-correction, which is why the scientific method has been such a valuable tool for humanity.  Krauss details the baby steps taken in our human search for knowledge, steps often met with wildly erroneous interpretations, each of them critical points in our collective knowledge.

            Krauss brings his physics knowledge to bear on what is the most complex and mysterious part of our everyday world, the quantum realm.  He guides the reader through the many different steps us humans required to comprehend that the sub-atomic world even existed, and details plainly why it remains such a difficult science to explain.  Everything in our modern world is touched by subatomic processes, from the manufacture of medicine, to the Global Positioning Satellite System, to the various smart phones and gadgets we all take for granted.  None would work without our collective understanding of the processes involved in the quantum realm.  The irony remains that, even as we use quantum science to create new wonders, we still do not fully grasp exactly what processes allow for these modern marvels to function.  We are much like the ancient humans who used fire to bake clay, cook food, warm their home, and provide light, but had no clue as to what caused the fire to exist in the first place.  We now know that free oxygen atoms in our atmosphere combine with the carbon in wood, and that this reaction creates new compounds (Carbon dioxide, water vapor) and energy (light, heat).  It seems common sense to us now, but to a human living 500 years ago this would be utter nonsense.  They “knew” that fire was but one of the four basic constituents of everything that exists, along with Water, Earth, and Air.  For centuries, this basic explanation served its purpose, but it did not actually provide verifiable, repeatable truth.  Only the scientific method does that.

            I hope that this book receives a very wide readership, for it is as equally valuable to a young scientist as it is to a layperson interested in big ideas.  Our world bounces back and forth from close-minded totalitarian fundamentalism to wide-open progressive ideals.  It is very easy for a society to lose ground, to lose hard-earned knowledge and wisdom, because someone, or something, claims to know all the answers.  Beware of anyone telling you to stop asking questions.  RUN AWAY from anyone telling there are no new answers out there and we already know all we need to know.  They are Liars and con-artists and only seek to control you so they can line their pockets.  Find those among us who are kind, who seek new answers and new questions, who understand that, for all we know as humans, our knowledge is dwarfed by the vast amounts we do not know.  Lawrence M. Krauss has crafted an amazing book, one that not only tells us what we know and how, but informs us of what we have yet to find out.  I highly recommend it.


(This book can be purchased here: https://mitpressbookstore.mit.edu/book/9781637588567 )

20.12.22

Italo Calvino Uses Words to Help Us Travel Through Deep Time

 


Cosmicomics – Italo Calvino (1965)

 

            I have read so many science fiction books and stories.  Many of their authors use specific scientific data or details to build stories around.  A few actually try to create stories that help the reader understand the scientific concepts discussed in the works.  Even fewer of those manage to create gripping, inventive stories.  Italo Calvino managed all of this and more.  What an amazing collection of short stories!

            I have been fortunate to discover many classic authors as part of my reading on this Book Journey.  From OG sci-fi writer Henry Kuttner, to modern author Cory Doctorow, I treasure finding their work and feeding my brain with their stories.  The one book I have read which most closely resembles Cosmicomics, however, is Clifton Fadiman’s Fantasia Mathematica, a collection of short stories from the 1950’s dealing with purely mathematical subjects.

            Italo Calvino takes the same approach with cosmology, specifically an exploration of the basic concepts used to describe the development of our Universe, from the Big Bang to the farthest reaches of deep time. His main narrator, inscrutably named Qfwfq, regales the reader with stories of his past, describing in beautiful allusions and metaphors, what the universe was like in the very first instances of existence.  In one story, he describes how the Moon used to be so close to the Earth that at certain points in the year, people would climb long ladders to reach the Moon, and harvest essential nutrition from it.  This is based on the knowledge that our Moon, Luna, is slowly moving away from the Earth.  In a million years, the Moon will be far smaller in our sky, and will not completely cover the Sun during eclipses.  In the far past, the Moon was much, much bigger than the Sun in our sky.

            In another great story, Italo’s narrator describes what it was like for him to exist as a creature who once lived in water, but is now on land, and all the accompanying weirdness!  One tale describes what the inner thoughts of fundamental particles must be like, while another shares the story of three entities forever falling through space and time.  Each tale is self-contained, but the whole collection truly helps expand the mind.  I found much wisdom in these stories.  The ancient poets created stories such as these to use as learning tools, handing them down orally to the next generation.  Mr. Calvino wanted to do the same with the often-misunderstood knowledge of Deep Time brought forth by Relativity and 20th century cosmology.

            Ancient scribes did likewise. These old stories were often misinterpreted or misunderstood by people of later generations.  Instead of seeking intellectual and informational wisdom in them, people started to see them as “divine” messages, or as dogmatic truth.  The very same thing could happen to Italo Calvino’s stories, should someone read them in two or three centuries, well after the average human forgets or is no longer taught basic scientific truths.  We seem to be headed in that direction now, sadly, and this blog, RXTT’s Book Journey, is my small attempt to forestall the stupidization of humanity.

            I must commend a Mr. William Weaver, who translated these stories into English around 1968.  The world owes so much to good translators.  It is almost as important a job as actually writing the books themselves!  Translation is how we can share ideas across cultures, continents, and centuries.

            I highly recommend this book to anyone with an interest in science fiction, mind expansion, originality, and creativity in storytelling.  It feels like something of a miracle that stories like this are available for us to read.  We are very fortunate indeed!

(This book can be downloaded and read here: https://www.are.na/block/11318370 )

13.10.17

Tycho Brahe & Johannes Kepler. Two shining lights in a sea of ignorance.





Tycho & Kepler: The Unlikely Partnership That Forever Changed Our Understanding of the Heavens – Kitty Ferguson (2002)

The knowledge that humanity has built up over our existence is always dependent on the sharing of information and the ability to spread the information as far as possible.  One never knows just who will be the person to grasp that bit of data and head off on a new intellectual adventure.  This is especially true in the sciences, where solitary scientists spent years of their life making very careful observations of the natural world and the heavens around us.  This hard data is the basis of all science.  Only when such rigorous data is obtained are the theories that seek to explain the data able to be verified, or rejected as not conforming to the verified data.  For decades, Tycho Brahe labored as the pre-eminent astronomer of his time, using his knowledge and position to build ever more elaborate and precise astronomical observation instruments.  His data, gathered after countless thousands of man-hours spent between him and his many assistants making nocturnal observations, spoke no truths in and of itself.  It was up to a younger astronomer and mathematician, Johannes Kepler, to utilize this storehouse of astronomical data in his quest for the truth about why and how the planets move through the sky, and bring about a revolution in the human understanding of the Universe.

The two men could not have been more dissimilar.  Tycho Brahe was, while not a royal, a member of a family that had been deeply ingrained in Denmark’s aristocracy, with members serving royal courts, acting as bishops in the church, and running fiefdoms in accordance with the King’s will.  Tycho Brahe grew up and was educated with the intent to have him become one of these servants to the crown, which included not only formal education, but the skills and tact necessary to commiserate with the royal courts of Europe and the egos found within.  He ingratiated himself with the king and was given many opportunities to pursue his intellectual and scientific curiosity, mostly abandoning the family demands that his class demanded.  Johannes Kepler was a more modest man.  He was not raised in the aristocracy, but his family members were well respected members of academia, business, and local religion.  Kepler did not have the connections available to Brahe.  He had to seek out his place in life.  He wanted to study the cosmos, but his family would not support it, hoping he would become one of the new class of professional men, and urging him to become a physician, a job more respectable than University professor at the time.

It is the life stories of these two men, and how they eventually became intertwined for posterity, that is the main thrust of this book.  It details both men’s childhoods, their educations, their attempts at scientific discovery, and their nearly endless troubles with the crown, the churches, and the profound level of ignorance that they found themselves surrounded with.  Tycho Brahe worked for decades, cataloguing a star chart the likes of which had never even been attempted by a human being.  In the later years of his life, and through countless setbacks, he accepted Johannes Kepler as his assistant.  In fact, he had chosen a man whose intellectual abilities rivaled the master’s, and who would guarantee the immortality of Tycho Brahe and his work.  Johannes Kepler used these precise measurements to understand what we now know as the Solar System.  He was the first human to do so, working out his three Laws of Motion, which are the basis for nearly all of modern astronomy. 

Johannes Kepler’s insights allowed him to describe our heavens in a way that had never been understood before.  Tycho Brahe had refuted the Ptolemaic system, which stated that the sun, planets, and stars all rotated around the Earth, which was the center of existence.  Tycho did not, however, postulate a solar system where the planets all rotate around the Sun.  Instead, he created a very complex system to explain the motions of the heavenly bodies.  It was not perfect.  Johannes Kepler, much to Brahe’s consternation. Supported the Copernican model of the solar system, in which the Sun stood in the center and the planets and stars all rotated around the Sun.  Kepler also suspected that the stars were much further away than the planets.  These and other observations were extremely revolutionary, not just for science, but for humanity at large.  Humans had been living under the Ptolemaic system for centuries because it aligned with the teachings of the catholic church.  The Earth was the center of all things, as it should be, since god created earth for humans and humans are his most perfect creation. Everything else is secondary. These types of circular arguments are all that any organized religion has to justify their own bullshit existence.  The church silenced any scientists that sought to understand the true reality of existence, even setting a few of them on fire. 

            Both Brahe and Kepler had to contend with a Europe in the midst of a Counter-Reformation.  The Calvinists and Lutherans that had started the Reformation, were now being attacked on all sides by the Holy Roman Empire and the ridiculous catholic church.  In catholic towns, protestants were banished or killed if they chose not to convert, with their heads hung on pikes for the world to see their “sin.”   In Protestant towns, Catholics were equally persecuted, all for supporting the Pope.  These two men of science, men of reason and enlightenment, and devout Christians both, were plagued on all sides by the stupid, petty, and evil wars that religions create among us to keep us in their debt and our money in their coffers. (It is still the same damn thing).  Not only did Kepler have to contend with religions and their stupidities, but he had such a tragic life.  He lost his first wife and around 9 children to disease over the span of twenty years.  His mother was accused and tried at age 72 for being a witch, by the ignorant Christians in her town.  Thank rationality and human ingenuity that Kepler was able to overcome all this and work on astronomy.

The bravest among us are the ones willing to stand up for their individuality and the ability to think for oneself.  Humanity is filled with countless people and organizations who seek to dampen human intelligence, to keep us stupid and slobbering at their crooked teats.  People like Johannes Kepler and Tycho Brahe who are strong enough and fortunate enough to hold their own against the tide of shit around them do so for the betterment of all humankind.  Without these two men our world would be a lot different.  The story of their lives and research is invaluable and anyone interested in the history of astronomy, or human thought, should read this book.

(This book can be purchased here:  AMAZON  )

24.8.17

Neil deGrasse Tyson brings the Astrophysics to us





Astrophysics for People In a Hurry – Neil deGrasse Tyson (2017)


            The science of Physics, and specifically Astrophysics, has always fascinated me.  I have found that the best way to step outside my own reality tunnel, and to gain what Mr. Tyson labels the “Cosmic Perspective,” is to read and study about the amazing achievements and discoveries that humans from ancient times have made regarding the cosmos we live in.  Our current world-society, with its incessant data-feeds and distractions, impedes people from reflecting on the Universe at large, and the amazingly complex and utterly massive nature of it.  We are all obsessed with our day-to-day grind, our jobs, our families, the news, politics, financial worries, etc.  It is because of this glut of activities and concerns that take up much of the modern human’s life that Neil deGrasse Tyson wrote this great little book.

            One of Neil deGrasse Tyson’s greatest traits is his ability to be a science explainer.  Very few scientists have this ability, and because of this, many non-scientists feel that either science is too complex to be understood by them or that scientists are purposefully being obtuse and intricate so as to not share their knowledge with “normal” people.  That is a real shame, because the basics of all the sciences affect us every single day, and without this knowledge it is too easy to be fooled by charlatans and con-artists seeking to impress you with pseudo-science and psychobabble, which all sound very plausible as long as you do not think critically about them.  Some hard-line nerds may put down Mr. Tyson because his focus is on education and dissemination, just as they used to insult Carl Sagan, that last great astronomer-teacher.  Screw them.  The world needs people who can clearly, and patiently, explain the vast knowledge we have accumulated to those who are interested, but do not have the rigorous and expensive education needed to grasp the mathematical underpinnings of science.  I would rather our best and brightest minds become celebrities than the vapid illiterates that society worships
.
            In the first chapters Neil deGrasse Tyson explores the development of astrophysics and humanity’s evolving understanding of the heavens above, deliberately highlighting how new discoveries and technologies forced us to change our perspective, from being self-absorbed and obsessed with our human primacy among the cosmos, to finding out that our planet Earth is not the center of the Universe, to discovering out that our Solar System is just one of countless billions in our Milky Way galaxy, to learning that our immense galaxy is just one among billions that populate the Universe, to understanding that we cannot even see much of the Universe due to its expansion.  It is a breathtaking journey that is all the more amazing because it happened in a blink of cosmic time, the teeny tiny sliver of time that Homo Sapiens Sapiens has been studying the heavens.  Compared to the age of our Earth (around 4.5 billion years) humans have not been around very long at all. Compared to the age of our Universe (around 14.5 billion years) we have barely begun to exist!  It blows my mind to think that we humans have only been able to study the heavens as they are for the past several hundred years.

            Each chapter is divided into the different ways that astrophysics are able to study the cosmos.  Some deal with the visible light available.  Others talk about the discovery of the remnants of the big bang, mapped through microwaves.  One chapter details the development of radio frequency telescopes, capable of exploring parts of the Universe that are invisible in any other manner.  From gamma detectors to cosmic rays, to the particle/antiparticle pairs that are popping in and out of existence throughout all of “empty” space, every major movement and field of study in astrophysics is presented, and the latest data and ideas about these findings are shared with the reader.  This is all in the service of what Mr. Tyson discusses in the last chapter, which is the beauty and joy of the Cosmic Perspective.  Understanding that we truly are one with the cosmos, that we are made of the same material that the Universe is made of, that our world is one of billions, that all life on Earth, and maybe all life in the Universe, is united by the common threads of our existence, and that it is our ability to understand the Universe itself that sets us apart, all are vital for each and every human being to understand.  The divisions that humans create to aggrandize one group and demean and subjugate another are illusions.  They are outright lies.  We are all humans, all conscious, all alive, all looking for our place in the Universe and our place among our human society.  I hope many people read this book and take the Cosmic Perspective to heart.

(This book is available for purchase here:  AMAZON  )