Episodes
-
Its gravity holds the Solar System together, influencing the orbits of planets, moons, comets, and asteroids. This stellar giant is primarily composed of hydrogen and helium, undergoing nuclear fusion in its core, where hydrogen atoms combine to form helium, releasing a tremendous amount of energy. This process is the source of the Sun's light and heat, essential for life on Earth.
-
Predicted by Albert Einstein in 1916 as a consequence of his General Theory of Relativity, these waves propagate at the speed of light, carrying with them information about their cataclysmic origins and about the nature of gravity. Unlike electromagnetic waves, which travel through space, gravitational waves actually travel through spacetime itself, making them a unique messenger in the realm of astrophysics.
-
Missing episodes?
-
According to this theory, the universe began from an extremely dense and hot state approximately 13.8 billion years ago and has been expanding ever since. This initial explosion not only created the majority of matter but also the physical laws that govern our cosmos.
Initially, the universe was in a state of extreme heat and density. Within the first few moments, it began expanding rapidly—a phase known as cosmic inflation. This expansion helped to smooth out any irregularities or anisotropies in the nascent universe, laying the groundwork for a more uniform distribution of energy and matter. As the universe expanded, it also began to cool, allowing for the formation of subatomic particles, and later simple atoms.
-
It was formed approximately 4.6 billion years ago from the gravitational collapse of a region within a large molecular cloud most commonly found in the Milky Way galaxy. Over millions of years, the collapsing material formed a spinning disk, with the Sun coalescing at its center, growing hot and dense enough to initiate nuclear fusion.
-
Nestled within the Orion Nebula, which itself is a part of the larger Orion Molecular Cloud Complex, the cluster is a vivid laboratory for the study of young stars and their development. This cluster is relatively close to Earth, situated approximately 1,300 light-years away, in the constellation of Orion, making it an accessible and invaluable resource for astronomers.
-
Stretching about 100,000 light-years in diameter, it is a part of a larger group of galaxies known as the Local Group. This majestic galaxy, seen from Earth as a milky band of light arching across the night sky, contains a complex structure of spiral arms wrapped around a dense central bulge, which is believed to harbor a supermassive black hole known as Sagittarius A*.
-
It is the largest member of the Local Group of galaxies, which includes the Milky Way, Triangulum, and several smaller galaxies.
The Andromeda Galaxy is the largest nearby galaxy to the Milky Way, with a diameter of approximately 220,000 light-years. It is visible to the naked eye on a clear night as a faint, fuzzy patch in the constellation Andromeda.
-
Available on Audible and iTunes. "Book 101 Review Volume 2" continues the insightful exploration of literature and knowledge that was begun in the first volume. This ambitious compilation assembles reviews, critiques, and analyses of 101 significant works from a diverse array of genres, authors, and themes.
-
Available on Audible and iTunes. Life is Too Short: A Journey of Discovery, Fulfillment, and Joy" is a conceptual book that serves as an inspirational guide, exploring various facets of the human experience. It encourages readers to live life to the fullest, recognizing that life's brevity calls for intention, appreciation, and celebration.
-
Available on Amazon and leading online bookstores worldwide. Life is Too Short: A Journey of Discovery, Fulfillment, and Joy" is a conceptual book that serves as an inspirational guide, exploring various facets of the human experience. It encourages readers to live life to the fullest, recognizing that life's brevity calls for intention, appreciation, and celebration.
-
Available on Amazon and leading online bookstores worldwide. In the comprehensive and enlightening book, "Earth's Fever: The Unraveling Climate and Our Race to Restore Balance," readers are taken on an explorative journey through the complex landscape of climate change. Authored with passion, precision, and a profound sense of urgency, this book serves as both a wake-up call and a roadmap to action.
Spanning 40 compelling chapters and an inspiring epilogue, "Earth's Fever" delves into the multifaceted dimensions of the global climate crisis. From the science of melting ice and rising seas to the ethics of climate justice and grassroots movements, this book leaves no stone unturned. -
Available on Amazon and leading online bookstores worldwide.
-
The outer limit of the Oort cloud defines the cosmographic boundary of the Solar System and the extent of the Sun's Hill sphere
-
Two main types of star clusters can be distinguished: globular clusters are tight groups of ten thousand to millions of old stars which are gravitationally bound, while open clusters are more loosely clustered groups of stars, generally containing fewer than a few hundred members, and are often very young.
-
The rest mass of the neutrino is much smaller than that of the other known elementary particles excluding massless particles.The weak force has a very short range, the gravitational interaction is extremely weak due to the very small mass of the neutrino, and neutrinos do not participate in the strong interaction.Thus, neutrinos typically pass through normal matter unimpeded and undetected
-
The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.The boundary of no escape is called the event horizon. Although it has a great effect on the fate and circumstances of an object crossing it, it has no locally detectable features according to general relativity.In many ways, a black hole acts like an ideal black body, as it reflects no light
-
Some of the earliest cosmological models of the universe were developed by ancient Greek and Indian philosophers and were geocentric, placing Earth at the center.Over the centuries, more precise astronomical observations led Nicolaus Copernicus to develop the heliocentric model with the Sun at the center of the Solar System. In developing the law of universal gravitation, Isaac Newton built upon Copernicus's work as well as Johannes Kepler's laws of planetary motion and observations by Tycho Brahe
-
It has a diameter of about 46.56 kiloparsecs (152,000 light-years)[8] and is approximately 765 kpc (2.5 million light-years) from Earth. The galaxy's name stems from the area of Earth's sky in which it appears, the constellation of Andromeda, which itself is named after the princess who was the wife of Perseus in Greek mythology.
-
The term Milky Way is a translation of the Latin via lactea, from the Greek γαλακτικὸς κύκλος (galaktikòs kýklos), meaning "milky circle".[26][27] From Earth, the Milky Way appears as a band because its disk-shaped structure is viewed from within. Galileo Galilei first resolved the band of light into individual stars with his telescope in 1610. Until the early 1920s, most astronomers thought that the Milky Way contained all the stars in the Universe.[28] Following the 1920 Great Debate between the astronomers Harlow Shapley and Heber Doust Curtis,[29] observations by Edwin Hubble showed that the Milky Way is just one of many galaxies.
-
It is the fourth-largest planet in the Solar System by diameter, the third-most-massive planet, and the densest giant planet. It is 17 times the mass of Earth, and slightly more massive than its near-twin Uranus. Neptune is denser and physically smaller than Uranus because its greater mass causes more gravitational compression of its atmosphere. Being composed primarily of gases and liquids, it has no well-defined solid surface
- Show more