Questions

Since light takes so long to travel why does universe look homoge

The universe looks homogeneous on large scales because of the smoothing effects of cosmic inflation and the statistical averaging of large-scale structures. Despite the finite speed of light, the observations of the CMB and large-scale structure consistently support this homogeneity, aligning with the cosmological principle that underlies modern cosmology.
Question by: [email protected]

Have they found any microorganism form of life on another planet?

Scientists have not confirmed the discovery of microorganism forms of life on other planets. The search for extraterrestrial life encompasses various methods, including the analysis of the Martian surface by rovers such as Curiosity and Perseverance, the study of atmospheres of exoplanets, and the examination of moons within our solar system that may harbor subsurface oceans, like Europa around Jupiter and Enceladus around Saturn.
Question by: Marwow

Is there a book that can help laymen understand quantum mechanics

Yes, there are several books that aim to explain quantum mechanics to laypeople, without requiring a deep background in physics or mathematics. Here are a few notable ones: "Quantum Physics for Dummies" by Steven Holzner: Part of the popular 'For Dummies' series, this book breaks down the essentials of quantum physics in an easy-to-understand manner. It's great for beginners. "The Quantum World: Quantum Physics for Everyone" by Kenneth W. Ford and Diane Goldstein: This book aims to make quantum physics accessible to a general audience. It uses minimal mathematics and includes many analogies and examples. "In Search of Schrödinger's Cat: Quantum Physics and Reality" by John Gribbin: Gribbin is a well-known science writer and his book is a popular account of quantum mechanics, delving into its history and implications for our understanding of reality. "Quantum: A Guide for the Perplexed" by Jim Al-Khalili: This is a beautifully illustrated book that helps demystify quantum physics. Al-Khalili is known for his ability to explain complex concepts in an engaging and accessible way. "Six Easy Pieces: Essentials of Physics Explained by Its Most Brilliant Teacher" by Richard P. Feynman: While not exclusively about quantum mechanics, this book by one of the most famous physicists of the 20th century provides a clear and entertaining introduction to the fundamentals of physics, including quantum ideas. "The Dancing Wu Li Masters: An Overview of the New Physics" by Gary Zukav: This book covers a range of topics in modern physics, including quantum mechanics. It's written for a general audience and focuses on the philosophical and spiritual implications of quantum physics.
Question by: Muffinsdaddy

What’s the most strangest objects discovered in space?

Certainly, here are some of the strangest objects discovered in space: 1. **Black Holes**: Regions of space with gravity so strong that nothing can escape. 2. **Neutron Stars**: Extremely dense remnants of collapsed stars. 3. **Magnetars**: Neutron stars with incredibly powerful magnetic fields. 4. **Quasars**: Bright, distant objects powered by massive black holes. 5. **Dark Matter**: Invisible matter that does not emit light or energy. 6. **Dark Energy**: A mysterious force accelerating the expansion of the universe. 7. **Rogue Planets**: Planets not orbiting any star, drifting through space. 8. **Brown Dwarfs**: Objects between the size of a planet and a star. 9. **Exoplanets with Extreme Conditions**: Planets with unusual compositions or weather. 10. **Hypervelocity Stars**: Stars moving fast enough to leave their galaxies. 11. **The Great Attractor**: A region in space pulling galaxies towards it. 12. **Cosmic Microwave Background Radiation**: Thermal remnants from the Big Bang. 13. **KIC 8462852 (Tabby's Star)**: A star with mysterious light fluctuations. 14. **Galactic Cannibalism**: Larger galaxies absorbing smaller ones. These discoveries represent some of the most puzzling and fascinating aspects of our universe.
Question by: DARKLIGHT

Is the webb always hide behind in the shadow of the earth?

The James Webb Space Telescope (JWST) is positioned at the second Lagrange point (L2), which is about 1.5 million kilometers (0.93 million miles) away from Earth. At this location, the telescope is not always behind the Earth's shadow. L2 is a stable point in space where the gravitational forces of the Earth and the Sun balance the orbital motion of an object, allowing the telescope to maintain a stable position relative to Earth and the Sun. This position provides a continuous view of the sky without being obstructed by Earth's shadow.
Question by: Wuen

Can we detect radio waves from objects shifted beyond infrared?

Radio waves and infrared radiation are part of the electromagnetic spectrum, which encompasses a wide range of wavelengths and frequencies. Radio waves have longer wavelengths and lower frequencies than infrared radiation. Infrared radiation typically ranges from about 700 nanometers to 1 millimeter in wavelength, while radio waves can have wavelengths ranging from millimeters to meters or even longer.\n\nIf you're asking whether we can detect electromagnetic radiation with wavelengths longer than infrared (i.e., longer than 1 millimeter), then the answer is yes, we can. These longer-wavelength electromagnetic waves are often referred to as microwaves and radio waves.\n\nRadio telescopes are used to detect and study radio waves from various astronomical objects, such as stars, galaxies, and cosmic microwave background radiation, which has much longer wavelengths than infrared radiation. Some of the longest radio waves used in astronomy have wavelengths measured in meters.\n\nSo, in summary, we can detect electromagnetic radiation with wavelengths beyond infrared, including radio waves and microwaves, using specialized instruments like radio telescopes. These longer-wavelength waves provide valuable information about the universe and are routinely observed in astronomy.
Question by: Frogguy

Is it possible to find what is after pluto?

Pluto was considered the ninth and farthest known planet from the Sun in our solar system. However, in 2006, the International Astronomical Union (IAU) reclassified Pluto as a \"dwarf planet,\" which means it is no longer considered one of the major planets in our solar system.\n\nBeyond Pluto, there are numerous objects in the Kuiper Belt, a region of space beyond Neptune that contains many small icy bodies and dwarf planets. Some of these objects include Eris, Haumea, Makemake, and several others. These Kuiper Belt objects are relatively small and distant from the Sun compared to the major planets.\n\nIf you're asking about whether there might be more undiscovered objects or planets beyond Pluto, it's certainly possible. Astronomers continue to search for and discover new objects in the outer reaches of our solar system using telescopes and other observational techniques. The existence of such objects is a subject of ongoing research and discovery.\n\nSince my knowledge is based on information available up to September 2021, I recommend checking the latest scientific news and astronomical discoveries for updates on objects and phenomena beyond Pluto, as our understanding of the outer solar system is continually evolving. There may have been new discoveries or developments since that time.
Question by: Faktea

Why planetary systems orbit stars and not other type of objects?

Planetary systems primarily orbit stars because of the fundamental gravitational interaction between celestial bodies. This interaction is governed by Isaac Newton's law of universal gravitation, which states that every mass attracts every other mass with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. Because stars are usually significantly more massive than other objects in their vicinity, they have a stronger gravitational pull and can dominate the gravitational dynamics of their surrounding space.
Question by: Piv

How can we see back in time through wavelengths?

We can see back in time through wavelengths by studying light from distant objects in space. Light travels at a constant speed, so the light we observe from far-off celestial bodies took a long time to reach us. By analyzing this light, astronomers can learn about the object's past conditions and events, effectively looking back in time. This process is crucial in understanding the history and evolution of the universe. Different wavelengths, such as radio, infrared, visible, ultraviolet, X-ray, and gamma-ray, provide unique information about the objects they originate from.
Question by: Jray

Where is the closest black hole and what are they?

The closest known black hole to Earth is the one located in the binary star system called V616 Monocerotis, also known as A0620-00. This black hole is approximately 3,000 light-years away from Earth. Please note that new discoveries might have occurred since my last update, so I recommend checking the latest astronomical data for the most current information.\n\nBlack holes are regions in space where the gravitational pull is so strong that nothing, not even light, can escape from them once it crosses a boundary called the event horizon. They are formed from the remnants of massive stars that have undergone a supernova explosion, leaving behind a highly dense core. Black holes can also form through the collision of other black holes or the merging of neutron stars.\n\nBlack holes come in different sizes, ranging from stellar-mass black holes (a few times more massive than our Sun) to supermassive black holes found at the centers of most galaxies, including our own Milky Way galaxy. Supermassive black holes can have masses ranging from hundreds of thousands to billions of times that of the Sun.\n\nBlack holes have been a subject of fascination and intense study for astronomers and astrophysicists because they challenge our understanding of the laws of physics, particularly when it comes to the extreme conditions they create.
Question by: Marwow

Have scientists found planets that could possibly be habitable?

Today, there are more than 5,000 known exoplanets, ranging from gas giants to small rocky worlds. And perhaps most excitingly, astronomers have now found about a dozen exoplanets that are likely rocky and orbiting within the habitable zones of their respective stars.\n\nAstronomers have even discovered a few systems like TOI 700 (101.4 light years) that have more than one planet orbiting in the habitable zone of their star. We call these keystone systems.\n\nTOI 700 first made headlines when our team announced the discovery of three small planets orbiting the star in early 2020. Using a combination of observations from NASA s Transiting Exoplanet Surveying Satellite mission and the Spitzer Space Telescope we discovered these planets by measuring small dips in the amount of light coming from TOI 700. These dips in light are caused by planets passing in front of the small, cool, red dwarf star at the center of the system.\n\nBy taking precise measurements of the changes in light, we were able to determine that at least three small planets are in the TOI 700 system, with hints of a possible fourth. We could also determine that the third planet from the star, TOI 700 d, orbits within its star s habitable zone, where the temperature of the planet s surface could allow for liquid water.\n\nThe Transiting Exoplanet Surveying Satellite observed TOI 700 for another year, from July 2020 through May 2021, and using these observations our team found the fourth planet, TOI 700 e. TOI 700 e is 95 percent the size of Earth and, much to our surprise, orbits on the inner edge of the star s habitable zone, between planets c and d. Our discovery of this planet makes TOI 700 one of only a few known systems with two Earth sized planets orbiting in the habitable zone of their star. The fact that it is relatively close to Earth also makes it one of the most accessible systems in terms of future characterization.
Question by: Marwow

Where do virtual particles go?

Virtual particles are a part of quantum field theory, a theoretical framework that describes the quantum behavior of particles. They are not \"particles\" in the traditional sense, but rather fluctuations in a quantum field.\n\nThese virtual particles are constantly being created and annihilated in pairs, in what's known as quantum fluctuations. They pop in and out of existence in a very short amount of time, so short that it can't be directly observed. This duration is governed by the Heisenberg's uncertainty principle, which states that the more precisely the position of a particle is known, the less precisely its momentum (and therefore its energy) can be known, and vice versa.\n\nThese particles play a role in many quantum processes. For example, in the quantum electrodynamics (QED) description of the electromagnetic force, photons are exchanged between charged particles. These \"exchange photons\" are virtual photons; they are necessary for the force to work according to the rules of quantum mechanics, but they cannot be directly detected.\n\nSo, in answer to your question, virtual particles do not go anywhere in the traditional sense. They are temporary fluctuations in a field and they disappear as quickly as they come into existence. They serve as a mathematical tool to help physicists make accurate predictions about the behavior of real particles in the quantum realm.
Question by: Bigboy

What coordinate system do we use in the universe? How to check?

Astronomers use different coordinate systems depending on the scale and context:\n\nEquatorial Coordinate System: For local objects like planets or stars. It uses right ascension (similar to longitude) and declination (like latitude), based on the celestial equator and the vernal equinox.\n\nGalactic Coordinate System: For objects within our galaxy. The reference plane is the plane of the Milky Way, and the zero point is towards the Galactic Center.\n\nInternational Celestial Reference System (ICRS): The standard for most astronomical data. It's based on very distant extragalactic objects and is unaffected by local galaxy movements.\n\nComoving Coordinates: Used by cosmologists for large scale calculations. This system adjusts for the universe's expansion.\n\nTo verify these systems, astronomers compare observational data with their predictions. If they match, the coordinate system is deemed correct. Corrections for Earth's rotation, orbit, and axis movements may also be applied for precision.
Question by: Tin

Is a light beam a macro quantum mechanic effect?

Yes, light beams, including those observed by the James Webb Space Telescope (JWST), can be considered macroscopic quantum phenomena because they are made up of photons, which are quantum mechanical particles. Here are some examples of how light, observed with the JWST or otherwise, exhibits quantum mechanical properties:\n\nParticle-Wave Duality: Light has both wave-like and particle-like properties, a concept known as particle-wave duality. This can be seen in experiments such as the double-slit experiment, which demonstrates the interference and diffraction of light, and the photoelectric effect, which demonstrates the particle-like properties of light.\n\nQuantization of Energy: The energy of a photon is quantized, meaning it can only take on certain discrete values. The energy of a photon is directly proportional to its frequency, as described by the equation E=hν, where E is the energy, ν is the frequency, and h is Planck's constant. This quantization of energy is what allows the JWST to detect different frequencies (and thus energies) of light, including infrared light that is not visible to the human eye.\n\nSuperposition and Entanglement: In quantum mechanics, particles such as photons can exist in a state of superposition, where they exist in multiple states simultaneously until measured. Furthermore, photons can be entangled, meaning the state of one photon is directly connected to the state of another, regardless of the distance between them. While these properties are not typically relevant to the operation of a telescope, they are central to other fields of study such as quantum computing and quantum cryptography.\n\nThese quantum mechanical properties of light are observable and testable on a macroscopic scale. That being said, while light is fundamentally a quantum mechanical phenomenon, our everyday experience of light (including the images captured by telescopes like the JWST) is largely explained by classical physics, with quantum effects typically becoming more noticeable under specific experimental conditions.
Question by: Bigboy

How to find other galaxies?

The James Webb Space Telescope (JWST) can find other galaxies by using its infrared sensors to detect the light that these distant galaxies emit. This light has been stretched out (or \"redshifted\") into infrared wavelengths due to the expansion of the universe. JWST's large mirror and high sensitivity also allow it to see very faint and distant galaxies. Additionally, it uses techniques like spectroscopy to study the characteristics of these galaxies.
Question by: Yikai

What space is larger. The quantum realm or the known universe?

The \"quantum realm\" is not really a \"space\" in the sense of a physical region or volume, like we usually understand the term. It refers to the scale at which quantum mechanical effects become apparent, which is extremely small -- much smaller than individual atoms. Quantum mechanics is a branch of physics that deals with phenomena on this very small scale, such as the behavior of electrons, photons, and other elementary particles.\n\nOn the other hand, the known universe is everything we can observe from Earth or from space-based telescopes and other instruments, extending for billions of light years in all directions. It contains a vast number of galaxies, each containing billions or trillions of stars, along with all the other matter and energy in the universe.\n\nSo in terms of physical size or volume, the known universe is incomparably larger than the scale of phenomena typically described by quantum mechanics.\n\nHowever, it's worth noting that quantum mechanics and the theory of relativity -- which describes the large-scale structure of the universe -- are both fundamental aspects of our current understanding of physics. Even though they operate on very different scales, they are both essential for a complete description of the universe. Efforts to reconcile these two theories into a single, unified theory of quantum gravity is one of the major ongoing challenges in theoretical physics.\n\nQuestion by: Bigboy
Question by: Bigboy