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Cosmology

Cosmology is the area of physics that studies the universe in and of itself. Through the use of incredible and ingenious methods of experimentation, cosmologists attempt to discover how the universe began, how it is developing, and how or if it will end. Questions regarding the Big Bang, dark matter, dark energy, the cosmic background radiation, and the initial formation of the fundamental particles can be placed into this category.

776 Questions

Are gamma rays stronger than cosmic ray?

Gamma rays are a form of electromagnetic radiation, and they are the highest frequency form of that type of energy. They can be said to vibrate fastest. But cosmic rays are mostly protons, which are a form of particulate radiation. Comparing gamma rays to cosmic rays as regards frequency is not something we do.

Where can you buy big bang Pegasus?

Big Bang Pegasus is a Beyblade, typically available for purchase from online retailers such as Amazon or eBay, as well as specialty toy stores or hobby shops. Be sure to check for authenticity and seller credibility when making your purchase.

Where is the closest wormhole to Earth?

There are currently no known or proven wormholes near Earth. Wormholes are theoretical passages through spacetime that could potentially connect two distant points, but there is no empirical evidence of their existence or proximity to Earth.

What type of creature can be found during a full moon?

Werewolves are commonly associated with full moons in various folklore and popular culture, where they transform from a human into a wolf-like creature. This transformation is said to be triggered by the full moon's influence on their behavior.

Does dark energy affect the size of a universe?

Dark energy is thought to be the dominant force driving the accelerated expansion of the universe. Therefore, it does affect the size of the universe by causing it to expand at an accelerating rate. This expansion is causing galaxies to move away from each other at increasing speeds.

Did the big bang create earth?

Not directly; sincethe big bang occurred 13.7 billion years ago, as an evolutionary expansion of space-time marking the beginning of the universe, there would not have been aggregate matter upon this initial event. Fundamental particles formed, and then atoms (mainly hydrogen and helium). These gaseous elements underwent fusion (nucleosynthesis) in stars for billions of years before Earth formed. Earth is a rocky planet, full of heavy elements that could only form from the heat of supernovae (exploding giant stars). Since Earth is a rocky, heavy-element planet like this, it required the existence of the heavy elements before it could form. Earth eventually formed in the solar system of a second generation star (the Sun) 4.56 billion years ago. So no, the Big Bang did not directly form the Earth, nor any other planet for that matter. It may be correcter to say the Big Bang produced the earliest fundamental particles, but I prefer to understand the Big Bang as an expansion of space-time not necessarily directly having to do with the formation of matter (fundamental particles).

Who was the Italian astronomer who said the earth revolves round the sun?

Nicolaus Copernicus, in his book De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres, published in 1543), first showed that the earth revolves around the sun. However, he was Polish, not Italian. Galileo Galilei (born 1564 in Italy) started publicly supporting the heliocentric theory in 1610, which he backed up with observations through his telescope.

How come Jimmy neutron wears the same clothes?

Jimmy Neutron wears the same clothes in every episode because it helps to establish his character and make him easily recognizable to the audience. It's a common practice in animated television shows to maintain consistency in character design.

How many worlds are there in total numbers?

There is no definitive answer to this question as the concept of worlds can vary depending on context. In astronomy, there are billions of galaxies with each containing billions of stars, potentially supporting many worlds. In a philosophical or metaphysical sense, the idea of parallel universes or dimensions could imply an infinite number of worlds.

What percentage of universe are neutrons?

Neutrons are one of the three fundamental particles of an atom, along with protons and electrons. In the universe, neutrons make up a small percentage of the overall matter content, with estimates placing them at around 1% of the total mass-energy content. The majority of the universe is composed of dark matter and dark energy, which together make up the vast majority of its mass-energy content.

Who first thought about wormholes?

The concept of wormholes was first proposed by physicists Albert Einstein and Nathan Rosen in 1935 as part of the theory of general relativity. However, it was theoretical physicist John Archibald Wheeler who coined the term "wormhole" in the 1950s.

Is electricity part of the big bang?

Electricity did not exist during the Big Bang. The universe during that time was incredibly hot and dense, and the fundamental forces of nature had not yet separated into distinct forces like electromagnetism. The formation of atoms and the subsequent development of charged particles eventually gave rise to electricity as we know it.

What is the friction in a quasar created by?

The supermassive black hole in the center of a quasar is surrounded by an accretion disk - a disk of gas rotating around the black hole. There is friction among the gas particles; this is due to the fact that different parts move at different speeds.

What did the big bang happen within?

I think this is very hard to answer in such a way that we can picture it or make sense of it which is why cosmologists express the posited origin of the big bang as a singularity. As Dr. Michio Kaku points out that really means we don't know as a singularity, we believe is somewhere, and some time where/when all the laws of physics break down. The most popular view is that all time and space began with the big bang.

There is the multiverse theory which would answer the question as in the "multiverse". I am sorry but I can not really do better than that.

What is Jimmy Neutron Dad's Favorite animal?

In the show "Jimmy Neutron," Jimmy Neutron's dad Hugh Neutron's favorite animal is a llama.

Can gamma rays from stars be captured and turned to energy?

Yes, but not to any usable amount. The amount of energy that comes from gamma rays bursts are, by the time they reach here, quite small. The INTENSITY of the bursts may be large, but they don't last very long. Also, they come from outside our galaxy, so they have lost most of their energy by the time they get to us. And the direction they arrive from is impossible to predict, so any collector would be impossible to aim for maximum efficiency.

If a ten meter by ten meter collector was 100% efficient in converting gamma ray energy into electricity, and was able to collect enough energy from gamma rays to power a 100 watt light bulb for ten minutes; the amount of gamma ray energy hitting our Earth would kill all humanity in less than a week. In a sense, it is a blessing that there is not a lot of gamma ray energy reaching us!

What is the irony how this was named the big-bang theory?

Fred Hoyle was a theorist who was working on the opposing view to the Big Bang model, called the Steady State hypothesis. In an attempt to show how ridiculous he believed the premise of the Big Bang theory to be, he coined the term "Big Bang" as an insult to the theory. However, proponents of the theory liked the name, and so adopted it.

How the age of the universe can be calculated using the big bang model?

By noting how rapidly galaxies are flying apart from each other, and how far apart they are now, we can calculate how far back in time it was that they started to fly apart. No different than the question, "Since the time Pat and Sam both began their journey at the same point on the highway, they have traveled at a speed of 100 kilometers per hour. They are now 200 kilometers apart. How long have they been traveling apart from each other?"

The present calculations of the age of the Universe by this method -- about 13.7 billion years -- agree quite well with other calculations, that were derived in a totally independent manner.

Do neutrons contribute to electrical charges?

Neutrons. A very similar word is neutral. And neutral means no side. So a neutron has no charge.

With that in mind, neutrons don't affect the charge of an atom. Instead, they contribute to part of the mass of an atom. They also affect the life of an atom or its stability. :)

How do neutron ovecome electrical repulsion of neutro?

There is no electro-static repulsion for neutral particles like neutrons.

Baryons -- such as protons and neutrons -- experience an attractive force between each that is very strong but short-ranged. Its name (a not very clever one) is the strong nuclear force. Without this strong force, no elements beyond hydrogen could exist.

How cosmic ray affect human system?

Cosmic rays are high-energy particles that can penetrate through the human body, potentially causing damage to cells and DNA. Prolonged exposure to cosmic rays can increase the risk of cancer and other health issues. However, Earth's atmosphere provides some protection against cosmic rays, and the risk for most people on the ground is relatively low.

What are the main things that make up universe?

The main components of the universe are matter (including atoms and particles), energy, and the fabric of spacetime. These elements interact and give rise to everything we observe in the universe, including galaxies, stars, planets, and living organisms. Additionally, dark matter and dark energy are believed to make up a significant portion of the universe, even though they cannot be directly observed.

What are the main significant events that occurred during the Big Bang?

During the Big Bang, the universe underwent rapid expansion, releasing a vast amount of energy and matter. Following this, fundamental forces like gravity, electromagnetism, and the strong and weak nuclear forces began to separate and interact differently, leading to the formation of elements and structures in the early universe. As the universe cooled down, particles started to combine to form atoms and eventually galaxies and stars began to emerge.

Where can cosmic background radiation be found?

Cosmic Microwave Background Radiation has been discovered via WMAP mission and it is suggested that this has been left over from the Big Bang and galactic clusters are still moving away from each other at an ever increasing acceleration. WMAP's measurements played the key role in establishing the current Standard Model of Cosmology: the Lambda-CDM model. In the Lambda-CDM model of the observable universe, the age of the observable universe is 13.772 ± 0.059 billion years.

What conditions lead you to see an absorption line spectrum from a cloud of gas in interstellar space?

The actual presence of the gas cloud's contents will absorb certain wavelengths of Light, preventing the passage of certain photons through the cloud, that results in that Light not reaching us - producing a blank line in the observed spectrum.