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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
What do you call a rip in space time?
It is not an established fact that space time has any rips in it, but the term wormhole has been used by physicists to describe a possible hole in the normal space time geometry, caused by an extreme gravitational field.
The universe is primarily made up of dark matter, dark energy, and normal matter. Normal matter includes atoms and particles like protons, neutrons, and electrons that make up stars, planets, and the things we see around us. Dark matter and dark energy are mysterious components that scientists are still trying to understand.
Were there gamma rays in the singularity that gave rise to the big bang?
Yes, it is believed that gamma rays were present during the early stages of the Big Bang, produced as a result of high-energy processes. However, the extreme conditions of the early universe make it impossible to directly observe these gamma rays.
Roti bread is traditionally round in shape to ensure even cooking on a flat griddle. The round shape allows the dough to be stretched and rolled out easily in a circular motion. Additionally, the round shape is practical for tearing and sharing the bread during meals.
What are three primary contributions to Astronomy?
- Observing and studying celestial objects and phenomena, such as stars, planets, and galaxies.
- Developing theories and models to explain the behavior and structure of the universe.
- Using technology, such as telescopes and satellites, to gather data and expand our understanding of space.
What are the seven realms of Anglo Saxon cosmology?
The seven realms of Anglo Saxon cosmology are Midgard (earth), Asgard (realm of the gods), Vanaheim (realm of the vanir gods), Jotunheim (realm of the giants), Alfheim (realm of the light elves), Svartalfheim (realm of the dark elves), and Helheim (realm of the dead). Each realm had its own significance and inhabitants in Anglo Saxon mythology.
What is beneficial of physical science?
One very minor benefit of the study of physical science is that it engenders new technologies like home computers, the internet, Wikianswers and maybe we may also be able to feed everyone on the planet.
Personally i feel we should study the sciences because we can.
As the only species on the planet that can use reason it is probably our duty to use our reason to the max.
Why were there particle's before the big bang?
Nobody knows for certain what happened before the Big Bang exploded, or why it exploded when it did explode. Astronomers have determined much of what happened back to the Big Bang, but, Nobody knows anything, about what happened before the massive explosion that started the universe we live in now, and for the last billions of years. There are countless unanswered questions about the pre Big Bang universe that might never be answered.
The colour of the big bang is impossible to tell. The singularity (a point of infinite density) before the big bang actually happened would have so much mass that not even light could escape, similar to a black hole. So right as it happened, which was expanding faster than the speed of light, it's density would still be enormous enough for a moment to not allow light to escape, but then once it did allow light to escape, all the light that it did not allow and "sucked" in would suddenly escape and with all that light it would be impossibly bright, and would seem white. And not until much later would you be able to see the colour and it would be many different colours depending on where you are looking (assuming that your retina's were extremely tough and didn't vaporize with the ridiculously brightness of the big bang)
The 1964 discovery of cosmic microwave background radiation supported the Big Bang theory of the universe. This radiation is considered a remnant of the early stages of the universe when it was hot and dense, aligning with the predictions of the Big Bang model.
What did scientists predict the big bang should have left behind?
Scientists predicted that the Big Bang should have left behind a faint glow of radiation spread throughout the universe, known as the cosmic microwave background radiation. This radiation was discovered in 1965 and is considered one of the strongest pieces of evidence in support of the Big Bang theory.
Did all iron on earth originate from the big bang?
No. The only elements made within a few million years (actually a few seconds) after the Big Bang were hydrogen, helium, and trace amounts of lithium. Iron was not created until stars began nucleosynthesis.
How fast do you have to travel to catch fire?
It is not possible to catch fire due to speed alone. However, if an object is traveling at extremely high speeds in Earth's atmosphere, the friction with the air could generate enough heat to cause it to catch fire. The specific speed needed would depend on various factors such as the object's shape and materials.
How do astronomers determine the speed at which a galaxy is moving?
By examining its spectrum, and identifying absorption lines in it.
Lines are shifted toward shorter wavelength if the object is moving towards us.
They're shifted toward longer wavelength if the object is moving away from us.
Studies have not shown dark matter to be composed of dim stellar remnants. Dark matter is thought to be made up of a non-baryonic, non-luminous material that does not interact with electromagnetic forces. Its presence is inferred from its gravitational effects on visible matter in the universe, and its exact nature remains unknown.
What are the top questions about the big bang bang theory?
There are two questions commonly asked:
1. Is it real, or did God create the universe ex nihilo?
2. Did the Big Bang create more than one universe?
3. How can the big bang account for dark matter and dark energy?
Were Apollo astronauts hot or cold on the moon?
Apollo astronauts experienced extreme temperature variations on the moon, ranging from around 260°F (127°C) in direct sunlight to -280°F (-173°C) in shadowed areas. They wore specially designed spacesuits to protect themselves from these temperature extremes.
What is the value of hubble's constant?
The current estimated value of Hubble's constant is around 70 kilometers per second per megaparsec. This means that for every additional megaparsec (about 3.26 million light-years) away a galaxy is from us, it appears to be moving 70 kilometers per second faster due to the expansion of the universe.
I'm sorry i can't be of any help. I just had the exact same problem not too long ago...
Among other things, it means Cosmic Microwave Background.
How long has Earth been broadcasting radio signals into outer space?
Earth has been broadcasting radio signals into outer space since the early 20th century, when radio technology became widely used. This means that for over 100 years, various radio signals, including TV broadcasts, have been traveling into space at the speed of light.
'Big Bang'- Is it scientifically proven?
== == Much of the material below is really opinion and/or discussion. See the related question 'Is scientific knowledge proven knowledge?' for some basic ideas around the concept of 'proven' knowledge. To me the theory is wrong, because the universe wasn't created by being blown up! If so what was every thing inside of??
== == The big bang theory is of course a theory; it is the opinion of several scientists who are interpreting a certain set of astronomical data. == == There is a great deal of supporting evidence. The direction is irresistably towards the acceptance of the Big Bang theory.
The Big Bang is finding more scientists in disagreement because the evidence is turning against it. Like many old paradigms, it still has its zealous adherents. But more scientists (not only creation scientists but secular cosmologists as well) are seeing data which does not fit it well. So, the direction in science is not towards the Big Bang but away from it - or at least, there is an acknowledgment that it doesn't fit some of the latest data. Of course the failure of the Big Bang to explain all the data will not lead to a rush toward creationism or intelligent design. The Big Bang theory itself will be drastically revised or it will be abandoned in favor of another theory which also fits with the long-age evolutionary paradigm. The strength of theories is not in their being proven correct. The best theories turn mysteries into problems. [Read Montague: Your Brain Is (almost) Perfect]. Problems can be approached, taken apart, reasoned and challenged. There is a way to envision our observations of the universe in such a way that they make sense. If it is not the Big Bang, it will be another theory that comes along some day. Theories come and go; it is the nature of science and it is its strength. Alternately, and without appealing to creationism or intelligent design, there are serious logical and philosophical reasons to doubt that any theory is or can ever be proven. But it is unmistakable that progress is made over time. So the heuristic that we know as science does work in that sense. If I had the need for surgical removal of a tumor I would accept the end-product of modern science, and I would not choose to go back to the Bronze Age to be treated by the elders. ** See the related question on proven knowledge.
What are higher dimensions and what do they look like?
A higher dimension is exactly what it sounds like: a dimension that is different (higher) from length, width, and depth. Our world is in three dimensions, and a higher dimensional universe would have four or mroe dimensions.
What does 3K cosmic background radiation mean?
3K cosmic background radiation refers to the microwave radiation that pervades the universe and has a temperature of approximately 3 Kelvin. This radiation is leftover from the Big Bang and provides important evidence for the expanding universe theory.
No, the sun does not shoot lasers. It emits energy in the form of sunlight through a process called nuclear fusion, where hydrogen atoms in its core fuse to form helium. Laser beams are man-made devices that use stimulated emission of radiation to produce a highly focused beam of light.
