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What is meant by velocity distance relationship with regard to the expanding universe?
The velocity-distance relationship in the expanding universe refers to the observation that the further away a galaxy is from us, the faster it appears to be moving away. This relationship is described by Hubble's Law, which states that the velocity at which a galaxy is receding is directly proportional to its distance from us. This relationship is one of the key pieces of evidence for the expansion of the universe.
What theory explains why the universe is expanding at a great speed?
The theory that explains why the universe is expanding at a great speed is called the Big Bang theory. According to this theory, the universe began as a hot, dense state and has been expanding ever since. The expansion of the universe is driven by dark energy, a mysterious force that causes galaxies to move apart from each other at an accelerated rate.
Is there a point where the universe stops?
Some say there is no end to the universe, that it is just expanding and expanding. If the universe has a center, I don't think we will be able to find it. If the Universe started from a single point, the big bang, and expanded at a huge speed then surely it must have an "end" or a "boundry". Just like a ball being blown up, It starts small and gets bigger and bigger. To add to that, if the universe started at one point as the big bang theory suggests the there has to be a center or at least a starting point. We have found the end of the universe but under Edward Hubble's theory and the general belief of today it is still expanding outwards Note: if you are looking for a short concise answer for you astronomy class above is great but if you want to really get into the subject look up the two theories above. Hope i helped. - This still does not make sense, there HAS to be a "center" of the Universe under the big bang theory, even if it is a ball or balloon blowing up, there is still a CENTER or middle of the ball or balloon. Even if there are no "edges" of the universe there is still a geometrical point of center. If the universe started from one point in space and expanded in all directions there is a center even if it is a moving central point.
In what direction is the universe moving?
Nearly all galaxies have a component of motion directly away from us. The farther a galaxy is from us today, the faster it appears to be receding from us.Nearly all galaxies are moving away from Earth. This is because the universe is expanding.
What evidence is there that the universe was different in the past?
We observe the universe with our various telescopes. Since light travels at a finite speed, it takes time for any light to travel from an object (say, a galaxy), to your telescope. Therefore, for any distant object, you are not seeing the object as it appears now, but as it appeared when the light left it.For very distant objects this can be billions of years, and further back in time you look, the more different the universe appears. Beyond about 13 billion years, there are no galaxies, for example.
The people who study the stars what does your universe appears to be doing?
Expanding
Is there any proof that the universe is changing?
Yes, there is proof. The universal redshift that appears in all distant electromagnetic spectra proves that the universe is expanding.
What does the redshift tell us about the universe?
Redshift is a phenomenon where light from distant galaxies appears redder than expected due to the expansion of the universe. It tells us that the universe is expanding and provides evidence for the Big Bang theory. By studying the redshift of galaxies, scientists can understand the rate of expansion and the age of the universe.
What do scientists know about dark energy?
In physical cosmology, astronomy and celestial mechanics, dark energy is a hypothetical form of energy that permeates all of space and tends to increase the rate of expansion of the universe. Dark energy is the most accepted theory to explain recent observations and experiments that the universe appears to be expanding at an accelerating rate. In the standard model of cosmology, dark energy currently accounts for 73% of the total mass-energy of the universe.
The scientific explanation that suggests the universe is expanding relies on two main concepts?
The scientific explanation that suggests the universe is expanding is based on Einstein's theory of relativity, where he found that the universe should be either expanding or contracting. It is also based on astronomers noticing the red tinge of light from nearby galaxies, meaning they were getting farther away.
Why the universe is black as the sun is present in the universe?
The Universe appears to be dark because space (meaning nothing), contains no matter for the sun to shine on. Also, another reason is that the universe is so large that, if you were to even try to look at the edge of the universe from outer space, the light would not exist beyond a certain point (because of the measurement of lightyears, and the never ending radius of the universe that is expanding). Thus, the universe is black.
What is meant by velocity distance relationship with regard to the expanding universe?
The velocity-distance relationship in the expanding universe refers to the observation that the further away a galaxy is from us, the faster it appears to be moving away. This relationship is described by Hubble's Law, which states that the velocity at which a galaxy is receding is directly proportional to its distance from us. This relationship is one of the key pieces of evidence for the expansion of the universe.
Can the universe be nothing or does it have to be matter also how could the universe be expanding It can't have been a certain size because it has to be infinite right?
One question at a time in the future, okay?Can the universe be nothing: well, it could, but clearly it isn't, as any fool can plainly see (all together now: "I can see that.").Does it have to be matter: it doesn't have to be matter, but clearly part of it is. ("I can see that.")How could the universe be expanding: how is not really a good question here. It appears to be expanding, though. You're excused for not being able to see that; it's kind of subtle and you have to know what to look for.It has to be infinite: well, actually, no it doesn't. And for a variety of reasons, we don't think it is.
Is the vacuum of space protection for which the universe is against what it is that its expanding into. just like our world has an atmosphere to protect us against the vacuum.?
The vacuum of space is not protection against what the universe is expanding into; rather, it is the absence of matter and particles. The universe is expanding into itself rather than into a void. Our atmosphere serves as protection from harmful radiation and provides the necessary gases for life to exist on Earth.
Why does space keep going and going and never stops?
Space is constantly expanding because of the force of dark energy, causing galaxies to move away from each other. There is no boundary or edge to the universe, so it appears to go on forever. Gravity from matter in the universe acts as a brake on this expansion, but dark energy seems to be winning, pushing the universe to expand at an accelerating rate.
What is recessional red shift?
Recessional red shift refers to the phenomenon where light emitted by distant galaxies appears to be shifted towards longer (redder) wavelengths as they move away from us due to the expansion of the universe. This effect is a key piece of evidence supporting the concept of an expanding universe and the Big Bang theory.
Relationship of red shift and the big bang theory?
Redshift is a phenomenon where light from distant galaxies appears shifted towards the red end of the spectrum, indicating they are moving away from us. The Big Bang theory suggests that the universe began from a singularity and has been expanding ever since. The observed redshift of distant galaxies supports the idea of an expanding universe, as galaxies moving away would cause their light to shift towards the red end of the spectrum.
