1 solar mass = 1.9891 × 1030 kilograms
Thursday, June 6, 2024
‘Those with masses below the critical threshold remain stable as neutron stars, while those exceeding it may eventually collapse into black holes.’ What’s the critical threshold? (ChatGPT, 2024-6-6)
The critical threshold, known as the Tolman–Oppenheimer–Volkoff (TOV) limit, is the maximum mass that a neutron star can have before it can no longer support itself against gravitational collapse and becomes a black hole. The exact value of the TOV limit is not precisely known because it depends on the equation of state (EOS) of nuclear matter at extremely high densities, which is still an area of active research.
Current estimates place the TOV limit in the range of approximately 2 to 3 solar masses (M☉). If a neutron star's mass is below this limit, it can remain stable as a neutron star. If its mass exceeds this limit, it will likely undergo further collapse to become a black hole.
Various observations and theoretical models continue to refine our understanding of the TOV limit, but it generally falls within this estimated range.
Why some neutron stars do not evolve to become black hole? (ChatGPT, 2024-6-6)
Not all neutron stars evolve into black holes due to a combination of factors involving their mass, rotational speed, and external influences. Here are the main reasons why some neutron stars do not become black holes:
1. **Mass**: The primary factor determining whether a neutron star will become a black hole is its mass. There is a critical mass threshold, known as the Tolman–Oppenheimer–Volkoff (TOV) limit, beyond which a neutron star can no longer support itself against gravitational collapse. This limit is estimated to be around 2 to 3 solar masses. Neutron stars with masses below this limit remain stable and do not collapse into black holes.
2. **Rotational Speed**: Neutron stars often spin rapidly due to the conservation of angular momentum from their progenitor stars. This rapid rotation provides additional centrifugal support against gravitational collapse. As a result, a neutron star can remain stable at a higher mass than it could if it were not rotating. Over time, if the neutron star loses rotational energy through processes such as electromagnetic radiation or interactions with a companion star, it may become less stable, but this process can take a long time.
3. **Magnetic Fields**: Neutron stars have extremely strong magnetic fields, which can influence their stability and evolution. These magnetic fields can create additional pressure that helps support the neutron star against collapse. However, over time, the magnetic field may decay, potentially affecting the neutron star's stability.
4. **Accretion and Binary Systems**: In binary systems, a neutron star can accrete matter from a companion star. If the accretion of matter increases the neutron star's mass beyond the TOV limit, it can potentially collapse into a black hole. However, if the accretion rate is slow or if the companion star does not provide enough mass, the neutron star can remain below the critical mass threshold and stay stable.
5. **Equation of State**: The equation of state (EOS) of neutron star matter, which describes how matter behaves at extremely high densities, plays a crucial role in determining the maximum mass a neutron star can support. Different EOS models predict different maximum masses for neutron stars. The exact nature of the EOS for neutron star matter is still an area of active research.
In summary, the fate of a neutron star depends on its mass, rotational speed, magnetic fields, and interactions with its environment. Those with masses below the critical threshold remain stable as neutron stars, while those exceeding it may eventually collapse into black holes.
Kelvin (克耳文)
https://en.wikipedia.org/wiki/Kelvin
單位為克耳文(K)。 若T代表物體的絕對溫度，t代表物體的攝氏溫度，則T=t+273.15。 一度K的溫度變化與1℃的溫度變化相同。 絕對零度(0K)等於-273.15℃是所有溫度的最低下限，在此溫度下，氣體的壓力及體積均為零。
The kelvin, symbol K, is the base unit of measurement for temperature in the International System of Units (SI). The Kelvin scale is an absolute temperature scalethat starts from 0 K, the coldest possible temperature (absolute zero), then rises by exactly 1 K for each 1 °C.[1][2][3][4] The Kelvin scale was designed to be easily convertedfrom the Celsius scale (symbol °C). Any temperature in degrees Celsius can be converted to kelvin by adding 273.15.[1][5]
Black hole (黑洞）
https://en.wikipedia.org/wiki/Black_hole
https://zh.wikipedia.org/zh-tw/%E9%BB%91%E6%B4%9E
A black hole is a region of spacetime where gravity is so strong that nothing, including light and other electromagnetic waves, is capable of possessing enough energy to escape it.[2] Einstein's theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.[3][4] The boundary of no escape is called the event horizon. A black hole has a great effect on the fate and circumstances of an object crossing it, but it has no locally detectable features according to general relativity.[5] In many ways, a black hole acts like an ideal black body, as it reflects no light.[6][7] Quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is of the order of billionths of a kelvin for stellar black holes, making it essentially impossible to observe directly.
neutron star (中子星）
https://en.wikipedia.org/wiki/Neutron_star
中子星（neutron star）是除黑洞外密度最大的星体，恒星演化到末期，经由重力崩溃发生超新星爆炸之后，可能成为的少数终点之一，质量没有达到可以形成黑洞的恒星在寿命终结时塌缩形成的一种介于白矮星和黑洞之间的星体，其密度比地球上任何物质密度大相当多倍。
A neutron star is a collapsed core of a massive supergiant star. The stars that later collapse into neutron stars have a total mass of between 10 and 25 solar masses (M☉), possibly more if the star was especially rich in elements heavier than hydrogen and helium.[1] Except for black holes, neutron stars are the smallest and densest known class of stellar objects.[2] Neutron stars have a radius on the order of 10 kilometers (6 mi) and a mass of about 1.4 M☉.[3]They result from the supernova explosion of a massive star, combined with gravitational collapse, that compresses the core past white dwarf star density to that of atomic nuclei.
White dwarf (白矮星)
https://en.wikipedia.org/wiki/White_dwarf
A white dwarf is the stellar core left behind after a dying star has exhausted its nuclear fuel and expelled its outer layers to form a planetary nebula.
白矮星（White Dwarf，也称为简并矮星）是一种低光度、高密度、高温度的恒星。 因为它的颜色呈白色、体积比较矮小，因此被命名为白矮星。 白矮星是演化到末期的恒星，主要由碳构成，外部覆盖一层氢气与氦气。
A white dwarf is a stellar core remnant composed mostly of electron-degenerate matter. A white dwarf is very dense: its mass is comparable to the Sun's, while its volume is comparable to Earth's. A white dwarf's low luminosity comes from the emission of residual thermal energy; no fusion takes place in a white dwarf.[1] The nearest known white dwarf is Sirius B, at 8.6 light years, the smaller component of the Sirius binary star. There are currently thought to be eight white dwarfs among the hundred star systems nearest the Sun.[2] The unusual faintness of white dwarfs was first recognized in 1910.[3]: 1 The name white dwarfwas coined by Willem Luyten in 1922.
origi and evolution of … (negativity vs vitality)
1. The Universe (which means THIS universe)
2. The Milky Way Galaxy
3. The Solar system
4. The Sun
5. The Earth
6. The Life
7. The Conscious
8. The Autonoetic Conscious
9. The Hominid
10. The Human
11. The Negativity (Evil)
How did the cell membrane appear? (ChatGPT, 2024-6-6)
The appearance of the cell membrane, a crucial component of all living cells, is thought to have resulted from the natural formation and self-assembly of lipid molecules in the prebiotic environment. Here's a step-by-step explanation of how the cell membrane might have formed:
1. **Simple Lipids in the Primordial Soup**: Early Earth likely contained simple lipid molecules, which could have been synthesized through abiotic chemical reactions. These lipids are organic compounds that have hydrophilic (water-attracting) heads and hydrophobic (water-repelling) tails.
2. **Formation of Micelles and Vesicles**: In aqueous environments, lipid molecules tend to spontaneously arrange themselves into structures called micelles and vesicles due to their amphiphilic nature. Micelles are small spherical structures, while vesicles are larger, hollow spheres with a lipid bilayer.
3. **Lipid Bilayers**: When lipid molecules encounter each other in an aqueous environment, they can form bilayers, with the hydrophobic tails facing inward and the hydrophilic heads facing outward. This arrangement is energetically favorable and leads to the formation of lipid bilayers, the fundamental structure of cell membranes.
4. **Encapsulation of Biomolecules**: These lipid bilayers can form closed vesicles that encapsulate water and other molecules within their structure. This process could trap organic molecules, such as proteins and nucleic acids, inside these primitive vesicles.
5. **Protocells**: These lipid vesicles, containing organic molecules, are often referred to as protocells. They represent a key step in the origin of life, as they provide a distinct internal environment separate from the surrounding environment, allowing for more complex biochemical reactions to occur.
6. **Selective Permeability and Early Metabolism**: The lipid bilayer of the protocells could have allowed for selective permeability, enabling certain molecules to enter or leave while keeping others contained. This selective permeability is essential for maintaining homeostasis and enabling metabolic processes.
7. **Evolution of Modern Cell Membranes**: Over time, through natural selection and evolutionary processes, these primitive protocells evolved more complex and efficient cell membranes, incorporating proteins and other molecules that enhanced their functionality. This evolution led to the development of modern cell membranes, which are highly dynamic and sophisticated structures capable of regulating the movement of substances, communication, and energy production.
In summary, the cell membrane likely appeared through the self-assembly of lipid molecules into bilayers, forming primitive vesicles or protocells that provided a stable environment for the development of more complex biochemical processes.
abiogenesis (生命起源)
https://en.wikipedia.org/wiki/Abiogenesis
https://zh.wikipedia.org/zh-tw/%E7%94%9F%E5%91%BD%E8%B5%B7%E6%BA%90
the origin of life from nonliving matter. specifically : a theory in the evolution of early life on earth: organic molecules and subsequent simple life forms first originated from inorganic substances.
自然發生論，或者說生命起源[2][3][4][a]，指的是自然歷程中無生命物質如何演變為有機分子乃至生命的學說[5]:vi[3][6][7]:47。目前普遍接受的假設是，地球上從非生物到生物的過渡不是一個單一的事件，而是一個演化的過程（即一個複雜性逐漸增加的過程），其中涉及到宜居星球的形成、有機分子的前生物合成、可自我複製、自組裝、自催化的分子，及細胞膜的出現。[8][9][10]對這一過程的不同階段，存在許多假說。[11]
Please explain abiogenesis to me. (ChatGPT, 2024-6-6)
Abiogenesis is the scientific hypothesis that explains the origin of life on Earth from non-living matter. This concept suggests that life arose naturally through a series of chemical processes that resulted in the formation of simple organic molecules, which eventually led to more complex molecules and the first primitive life forms.
Key points of abiogenesis include:
1. **Primitive Earth Conditions**: Abiogenesis likely occurred on the early Earth, which had a very different environment compared to today, with a mixture of gases such as methane, ammonia, water vapor, and hydrogen.
2. **Chemical Reactions**: Under the conditions of early Earth, energy sources such as lightning, ultraviolet radiation, and volcanic activity could have driven chemical reactions among these simple molecules, leading to the formation of more complex organic compounds, such as amino acids and nucleotides.
3. **Formation of Simple Life**: These organic compounds could have accumulated in the "primordial soup," a body of water containing these molecules, where they eventually combined to form more complex structures like proteins and nucleic acids.
4. **Self-Replication**: At some point, these complex molecules developed the ability to replicate themselves, a key characteristic of life. The first self-replicating molecules were likely RNA, which can store genetic information and catalyze chemical reactions.
5. **Evolution of Life**: Through natural selection and evolution, these primitive life forms became more complex over time, eventually leading to the diversity of life we see today.
Abiogenesis remains a hypothesis because, while there is substantial evidence supporting the chemical processes that could lead to the formation of life, the exact pathway and conditions that led to the first life forms on Earth are still not fully understood.
nebula (星雲）
https://en.wikipedia.org/wiki/Nebula
A nebula (Latin for 'cloud, fog';[1] pl.: nebulae, nebulæ, or nebulas[2][3][4][5]) is a distinct luminescent part of interstellar medium, which can consist of ionized, neutral, or molecular hydrogen and also cosmic dust. Nebulae are often star-forming regions, such as in the "Pillars of Creation" in the Eagle Nebula. In these regions, the formations of gas, dust, and other materials "clump" together to form denser regions, which attract further matter and eventually become dense enough to form stars. The remaining material is then thought to form planets and other planetary system objects.
Most nebulae are of vast size; some are hundreds of light-years in diameter.
Cosmic dust (宇宙塵埃)
What’s the giant impact hypothesis? （ChatGPT, 2024-6-6)
The giant impact hypothesis is a scientific theory that explains the formation of the Moon. According to this hypothesis, the Moon formed from the debris resulting from a collision between the early Earth and a Mars-sized body, often referred to as Theia, approximately 4.5 billion years ago.
Key points of the hypothesis include:
1. **Collision**: The impact was so powerful that it caused a significant amount of material from both the Earth and Theia to be ejected into space.
2. **Debris Disk**: The ejected material formed a debris disk around Earth.
3. **Accretion**: Over time, the debris coalesced and accreted to form the Moon.
4. **Similar Composition**: This hypothesis explains why the Earth and Moon have similar isotopic compositions, as the Moon is largely made from material that originated from the Earth's mantle and Theia.
The giant impact hypothesis is widely accepted because it accounts for several observed properties of the Earth-Moon system, including the size of the Moon, its composition, and the dynamics of the Earth-Moon system.
How to disturb the gravitational equilibrium among the celestial objects, like the galaxies, stars and planets? (ChatGPT, 2024-6-6)
Disturbing the gravitational equilibrium among celestial objects, such as galaxies, stars, and planets, involves exerting forces or introducing perturbations that significantly alter their motions or interactions. Here are some scenarios and mechanisms that can disturb gravitational equilibrium:
### 1. **Collisions and Close Encounters**:
- **Galactic Collisions**: When galaxies collide or pass close to each other, their gravitational fields interact strongly, leading to significant disturbances in their structures and the orbits of stars within them. For example, the anticipated collision between the Milky Way and the Andromeda Galaxy will significantly disrupt both galaxies.
- **Stellar Close Encounters**: Stars passing close to each other in a dense stellar environment, like a globular cluster, can exchange gravitational energy, altering their orbits and potentially causing ejections from the cluster.
### 2. **Massive Object Introductions**:
- **Adding a Massive Object**: Introducing a massive object, such as a black hole or a large planet, into an existing system can perturb the orbits of nearby objects. For instance, if a rogue planet were to enter the Solar System, it could disrupt the orbits of the existing planets.
- **Supermassive Black Holes**: The presence or migration of a supermassive black hole can significantly disturb the orbits of stars and gas clouds in its vicinity, leading to the formation of accretion disks, jets, and other phenomena.
### 3. **Gravitational Waves**:
- **Merging Black Holes and Neutron Stars**: The merging of black holes or neutron stars generates gravitational waves, ripples in spacetime that can propagate through the universe. These waves can, in theory, induce minor disturbances in the orbits of celestial objects they pass through, although the effects are typically very small.
### 4. **Resonances and Orbital Perturbations**:
- **Orbital Resonances**: When two or more orbiting bodies exert regular, periodic gravitational influences on each other, they can enter into orbital resonances, leading to significant changes in their orbits over time. For example, Jupiter’s gravitational influence has caused gaps in the asteroid belt (known as Kirkwood gaps) due to resonances.
- **Perturbative Forces**: Small forces, such as radiation pressure, stellar winds, or tidal forces, can gradually alter the orbits of celestial objects over long periods.
### 5. **Catastrophic Events**:
- **Supernova Explosions**: When a massive star explodes as a supernova, it can expel a significant amount of mass and energy into its surroundings, perturbing the orbits of nearby stars and gas clouds.
- **Gamma-Ray Bursts**: Extremely energetic explosions, such as gamma-ray bursts, can exert intense radiation pressure on nearby objects, potentially altering their trajectories.
### 6. **Artificial Interventions** (Hypothetical):
- **Large-Scale Engineering**: Advanced civilizations (hypothetically) could build massive structures or use technology to move or influence celestial objects. Concepts like the "Star Lifting" technique, where material is siphoned off stars, or creating artificial gravitational fields could, in theory, disturb gravitational equilibria.
- **Asteroid Deflection**: On a smaller scale, intentional deflection of asteroids or comets by spacecraft could be used to alter their orbits, potentially causing secondary effects on other objects.
### 7. **Dark Matter Interactions**:
- **Dark Matter Density Variations**: Changes in the distribution of dark matter within galaxies can influence the gravitational forces experienced by visible matter, potentially causing disturbances in the motions of stars and gas clouds.
### Conclusion:
Disturbing gravitational equilibrium among celestial objects usually requires significant forces or events. While some mechanisms involve natural cosmic processes, others remain within the realm of theoretical or hypothetical scenarios.
6/6/24（星期四）
韓國瑜說，共匪藉發行，超長期（太陽五十億年後燒光，所以超長期為五十億年）國債，把中國人銀行存款，自動換成這些廢紙，直接收刮，是包子解決，共匪債務，天大黑洞，以至包子家族，獨佔全體中國人財富的高招，至於趙家人諸家族，財產多已不在境內，則藉買路錢，一次又一次，刮骨收刮之；宇宙星辰生成，由星雲之「氣」起；為什麼傅柯，六十年前，即可預見，人之退位；
Wednesday, June 5, 2024
Are there other known solar systems in the Milky Way Galaxy like ours and how to find them? （ChatGPT, 2024-6-5)
While our Solar System is unique in its specific arrangement of planets and other celestial bodies, many other planetary systems have been discovered in the Milky Way galaxy that have similarities to our own. These systems are known as exoplanetary systems, and they often contain multiple planets orbiting a central star. Here are some notable examples and the methods used to find them:
### Notable Exoplanetary Systems:
1. **Kepler-90**:
- This system has eight known planets, similar to our Solar System, discovered by the Kepler Space Telescope. The planets range from Earth-sized to gas giants.
2. **TRAPPIST-1**:
- A system with seven Earth-sized planets orbiting a cool dwarf star. Three of these planets are located in the star's habitable zone, where conditions might be right for liquid water.
3. **HD 10180**:
- A star with at least seven planets, including both rocky and gas giant types, discovered using the radial velocity method.
### Methods to Find Exoplanetary Systems:
1. **Transit Method**:
- Detects exoplanets by observing the slight dimming of a star as a planet passes in front of it (transits). This method has been used by missions like the Kepler Space Telescope and TESS (Transiting Exoplanet Survey Satellite).
- Example: The discovery of the TRAPPIST-1 system with seven Earth-sized planets.
2. **Radial Velocity Method**:
- Measures the wobble of a star caused by the gravitational pull of orbiting planets. This wobble affects the star's light spectrum, shifting its lines slightly.
- Example: The discovery of multiple exoplanets around HD 10180.
3. **Direct Imaging**:
- Captures images of exoplanets by blocking out the star's light. This method is challenging but has been successful for a few large exoplanets.
- Example: The HR 8799 system, where four giant exoplanets were directly imaged.
4. **Gravitational Microlensing**:
- Detects exoplanets by observing the bending of light from a distant star as a planet passes in front of it. This method can find planets at greater distances from their stars.
- Example: The discovery of OGLE-2005-BLG-390Lb, a cold super-Earth.
5. **Astrometry**:
- Measures the precise movements of stars on the sky. Planets cause slight shifts in the star's position, which can be detected with high-precision instruments.
- This method has been used to confirm some exoplanet discoveries but is less common due to its complexity.
### Future Prospects:
1. **James Webb Space Telescope (JWST)**:
- Will provide detailed observations of exoplanetary atmospheres, potentially identifying biomarkers and other signs of habitability.
2. **European Space Agency's PLATO Mission**:
- Scheduled for launch in the 2020s, PLATO will focus on finding and studying Earth-like exoplanets around Sun-like stars.
3. **Ground-based Observatories**:
- The Extremely Large Telescope (ELT) and other next-generation ground-based telescopes will enhance the capabilities to directly image exoplanets and analyze their compositions.
Finding other solar systems involves a combination of advanced telescopic technology, sophisticated data analysis, and innovative methods to detect the subtle effects that planets have on their host stars. These efforts continue to expand our understanding of the diversity and nature of planetary systems in our galaxy.
Krugman Says China Is ‘Bizarrely Unwilling’ to Boost Demand
https://www.taipeitimes.com/News/biz/archives/2024/06/04/2003818819
- US economist says Beijing’s economic model is not sustainable
Paul Krugman Slams Beijing's Economic Model: 'World Will Not Accept Everything China Wants To Export'
Nebular hypothesis (星雲假說)
https://en.wikipedia.org/wiki/Nebular_hypothesis
The nebular hypothesis is the idea that a spinning cloud of dust made of mostly light elements, called a nebula, flattened into a protoplanetary disk, and became a solar system consisting of a star with orbiting planets.
Originally applied to the Solar System, the process of planetary system formation is now thought to be at work throughout the universe.
Protoplanetary disk (原行星盤)
A protoplanetary disk is a rotating circumstellar disk of dense gas surrounding a young newly formed star, i.e. a TTS. If the disk is massive enough, the runaway accretions begin resulting in the rapid—100,000–300,000 years—formation of Moon- to Mars-sized planetary embryos.
T Tauri stars (TTS) (金牛T星)
T Tauri stars (TTS) are a class of variable stars that are less than about ten million years old.[1] This class is named after the prototype, T Tauri, a young star in the Taurus star-forming region.
The Real Threat to Taiwan (Seth Cropsey, Harry Halem, WSJ, 2024-6-2)
https://www.wsj.com/articles/the-real-threat-to-taiwan-legislature-manipulation-china-dbfcd442
https://www.youtube.com/live/WJ88Cj7CQiM?si=9tMiyO1_E6yvyfBB
China is unlikely to invade but determined to subvert and manipulate the island’s politics.
意思是說，王滬寧宋濤對蔣介石蔣經國發誓，韓傅不是傑出的匪諜，
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