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Rates of radiometric decay, also by looking at the most distant detectable objects (galaxies about 14 billion light-years away).
1 light-year = the distance light travels in one year. If an object is 14 billion light-years away the universe must be at least 14 billion years old for the light to get to earth.
Oh, also by estimating the amount of hydrogen that has been converted by stars into other heavier elements, etc.
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By rolling back the universe to the point where the universe was a singularity using the known rate of cosmic expansion.
What else can I help you with?
When did it all start time life big bang universe......?
The universe is estimated to be around 13.8 billion years old, originating from the Big Bang. Life on Earth is thought to have begun around 3.5 billion years ago, starting with simple single-celled organisms. Time as a concept is more difficult to define in the context of the universe's beginning, as it is closely tied to the expansion of the cosmos.
How big do astronomers estimate the universe to be?
There is no end. They Universe is always expanding due to the big bang. ----------------------------------------------------------------------------------------- No, the Universe actually closes in on itself. If you left from here in any direction, and you went far enough and fast enough, you would arrive right back here. In any case, the Universe does not have any boundaries.
How old is the universe according to the big bang theory?
The Big Bang theory doesn't actually say all that much about how old the Earth is. Obviously, if the Universe is 13 billion years old, the Earth can't be any older than that. Less obviously, the Big Bang produced mostly hydrogen and virtually no metals ("metal" is astronomical code for "anything heavier than helium"). Heavy elements were produced later, in stars, and released by supernova explosions. Since the Earth is made mainly of elements heavier than helium, it has to have formed after there was time for stars to form, age, and go supernova, and for the gas and dust produced to coalesce into the solar system. However, this only provides a maximum age, not a minimum; as far as the Big Bang theory is concerned the Earth could have formed last Tuesday. The generally accepted age for the Earth (4-5 billion years) is based on other factors, such as radioisotope ratios in rock.The big bang theory has nothing to do with the age of the earth. Scientists think the earth is 4.4 billion years old. That is the age of the solar system. That is the age of some meteorites that have fallen to earth. Their age is determined by the ratio of uranium to lead. Uranium is radioactive and over the years becomes a special form of lead.The big bang theory had to do with the age of the universe. Scientists determined the age of the oldest light in the universe and put some formulas into their equations to figure out how long ago it was created. They assumed it was created by the big bang. If their equations are correct, they know the age of the universe.
What is the furtherest distance scientists have been able to see into the universe?
The answer is quite more complicated than it seems. The farthest astronomers have seen in the visual spectrum is the Hubble Ultra Deep Field. This picture looks back in time about 13 billion years, and the galaxies it has captured wereprobably no more than 800 million years old. But it is a common misconception that since light travels at a set speed, a picture looking back 13 billion light years must be a picture of something 13 billion light years away. This isn't the case. Since the universe is constantly expanding, the galaxies depicted in the HUDF picture are no longer 13 billion light years away. In reality, the universe is now about 90-140 billion light years across. It comes off as a paradox because the universe technically expanded faster than the speed of light (how else could light from galaxies now 90 billion light years away reach us in 13 billion years?) It's a strange consequence of general and special relativity. Put simply, the light from the farthest objects scientists can see originated 13 billion light years ago, but these objects are not that far away in real time.
How far does the galaxy travel in one year?
The radius of the observable universe is about 15 billion light years. That's 90 billion trillion miles or 1.35e+ 26 meters or 5.3149606299e+27 inches or 4.492133858e+26 feet or 4.4763779528e+26 yards or 1.25 e +28 centameters or 1.25 e + 29 mm. or 1.35 e + 32 micro meters or 1.35 e+35 nano meters or 1.35 e+38 picto meters or 1.3472083149 e+ 39 x unit or 1.35 e+ 50 yoctometer or 1.25 e+ 47 zepto meters. Comments: That's not the usual answer, given by astronomers. They usually say "about 45 billion light years". The AGE of the Universe is about 15 billion years, or more precisely about 13.7 billion years. So, light reaching us cannot have travelled more than about 13.7 billion light years. However, the Universe has been expanding. Something that emitted light 13.7 billion years ago could NOW be as far away as about 45 billion light years.
When was the universe and solar system formed?
Universe: About 13.8 billion years ago.Solar System: About 4.6 billion years ago. More details at the Wikipedia articles "Age of the Universe" and "Age of the Earth". The details include a discussion about the evidence.
How old do scientists think the universe?
They estimate the age of the Universe in more than 12 billion years.
What has existed for at least 3 million years?
The universe has existed for more than 14 billion years, the sun for more than 4 billion years - both well over 3 million years.
What is the age of an irregular galaxy?
About 13 billion years old. The Universe itself is approximately 13.75 billion years old. All galaxies are about the same age and Irregular Galaxies were more common when the universe was younger.
How long would it take to travel from the end of the universe to Earth?
Well, since the end of the Universe is constantly expanding, and since it would depend on how fast you are going, it could take 1 year to 10000000000000000000000 years or more. There is also very little evidence that the Universe actually has an ending.
According to the modern scientific view how old is the Universe?
The scientific consensus has the age of the universe at between 13.6 to 13.8 billion years. Use the link below to read more.
How can the universe be only some 14 billion years old when it can be contemplated that it could be 20 or 30 or more billions of years old?
The universe is actually about 15 billion years old. I'm not sure where you got the statistic that the Hubble Space Telescope can see 20 billion light years into space; I think you're off by a factor of three or so.
What is the size and scale of your solar system galaxy and universe?
the size of the universe is still unknown so no one can answer that question for the next 5 billion years or more.
How old is the Earth based on scientific evidence?
Most scientists agree that the Earth and our entire solar system is about 4.5 billion years old. To the extent that there are disagreements as to the age of the Earth, the disagreements are in the decimal places. Some argue for 4.5 billion; some claim 4.6 or 4.7 billion years is more likely.
Seeing that the known universe has a radius of 47 billion light years and it is understood to be approximately 15 billion years old how did it inflate faster than the speed of light?
The Universe is expanding faster than the speed of light. Each object is restricted to moving, at most, at the speed of light, within its own local space. According to the General Theory of Relativity, there need not be any such restriction to the Universe on larger scales. For more detail, check the Wikipedia article on "Metric expansion of the Universe", and related links. Answer2: It did not inflate faster than the speed of light. The minimum size of the universe is about 16 billion light years before the "Big bang". The expansion is exponential range of three 47 billion light years and exponent Ht = 1.0986. . The Hubble Constant is 2E-18, thus t = 1.0986/2E-18=17.41 Billion years. The Universe is around 17.5 billion Years, not 15 billion years old. -------------------------- Now the age of the Universe is considered (13,798 +/- 0,037).109 years.
Are there more than a billion galaxies?
There are approximately 100 billion galaxies in the known Universe.
Are there at least 350 billion or more large galaxies in the observable universe?
Yes, because scientists have found hundreds and hundreds of galaxies already and scientists say that there are more galaxies out there that they haven't found!
