Nowadays, with smart devices measuring pace, heartbeat or even the second breath, timing is still a top-notch intellectual challenge.
“We haven’t seen each other for a long time.” Is this really a long time? If we consider a galaxy with a billion-year history to be a young galaxy, we must realize that we have been together for a long time. But if we compare it to the time it takes for a photon to pass through a hydrogen molecule (this kind of event is measured in billionths of a second), which is the smallest unit of time so far, then we drink beer for eternity.
Therefore, the time indicated in capital letters allows for an excellent game. The clock that marks all possible times must be huge and smallest.
A team of researchers from the universities of Frankfurt, Hamburg and Berlin has been able to measure the shortest time to date. The unit used is zeptosecond, which is equal to 0.000000000000000000001 second. On the other hand, scientists estimate that about 4.5 billion years have passed since the birth of the earth. Since recent data indicate that Homo sapiens appeared only about 190,000 years ago, our species is in an endless period.
However, if the history of “Blue Planet” is explained on the scale of the universe, it won’t be too long. For example, it is very close to the life of stars.
If you blink, you will miss the big bang
Among those stars are white dwarfs. No one sees the death of anyone, because they are longer than the universe itself. If it knows time, its existence will escape the understanding of the earth itself. At the other end of the time scale, events happen very fast, and the universe challenges our thinking. According to the Big Bang theory, the appearance of elementary particles takes less than one second.
If we can see this phenomenon in the laboratory, then blinking at the wrong time is enough to miss the creation of a new universe.
Mankind has existed for less than 20 galactic years, which is equivalent to 4.5 billion earth years
In the universe, everything is a matter of scale. Overwhelming, but measurable. Javier Gorgas, president of the Spanish Astronomical Society, said: “When talking about astronomy, we must change the time scale, distance, mass…” He added: “If I say that a galaxy is one billion years old, then my colleagues fully understand that it is small.”
The periodic dance of the stars sets the tone for the calendar. It takes 365.25 days for the earth to revolve around the sun, so we use three 365-day years and another 366-day leap to measure time. Billion years). Both the life of stars and the age of the universe are very suitable for this scale of time.
But careful measurement confirmed that the number of 365.25 days is too accurate. You can use the sun as a reference or view other stars. In both cases, the results are different.The time elapsed between the two steps of the astronomical meridian and the meridian is equivalent to a solar day, and the time it takes for a star to occupy the same position in the sky relative to the previous day is called Sidereal day. The latter takes as little as 4 minutes. The same principle is used to distinguish between solar years and sidereal years. The first time lasted 365 days, 5 hours, 48 minutes and 45.9 seconds, while the sidereal time was 20 minutes longer.
The hands of the clock move slowly on the lower floors of the building
This lag is caused by the precession of the earth.The North Pole is not fixed, but goes around a large circle every 25,776 years: each circle is called Platonic. This movement causes the point in space (on which coordinates are defined) pointing to the north of the earth to move slowly over the millennium. The extra 20 minutes of a sidereal year corresponds to the time it takes for the Earth to recover the deviations of each solar year accumulated due to precession movement.
Finally, it can also be measured based on the time between two consecutive perihelions of the earth passing through two perihelions. This time period is 4 minutes longer than the stellar age and is called the anomalous age.
The orbital waltz of the earth and the sun marks the passage of days and years that we clearly perceive, but only astronomical observations can reveal the greater dance taking place in our galaxy.
Our solar system revolves around the center of the Milky Way every 225 million solar years. Each rotation is a galactic year, which is a difficult measurement to understand. Gorgas said: “There is a certain degree of uncertainty in the duration of the Milky Way, because the sun may slow down when passing through denser areas and accelerate in other areas, but this is between 225 and 250 million years. . ” The earth and the sun have about 20 years in the Milky Way, and the universe has about 60 years.
Soon after the first galactic year on our planet, the moon formed. The earth’s crust solidified in the third year of its Milky Way, and in the fifth year, one billion solar years away, the earth ushered in the first prokaryotic cells. Eukaryotes are those with a nucleus that can organize complex life forms and arrive in the galaxy seven years later.
Not long before humans entered the Milky Way (4.5 billion years now), humans entered history. However, although astronomers can move comfortably for thousands and millions of years, there are also shorter balances that require more precise measurements.
Gogas said: “It is very complicated to measure the passage of time very carefully.” The earth does not always rotate at the same speed relative to the sun, and the gravitational effect of the moon affects its path, thereby affecting the time of day. Even if it’s just a few seconds. Therefore, for practical purposes, atomic clocks are used.
Gogas explained: “The second one can be defined by the half-life of radioactive elements, or it can be defined based on the same basic physics problem in the entire universe.” Atomic clocks provide the necessary precision for solving phenomena such as pulsars, pulses Stars are neutron stars, and they rotate in a thousandth of a second.
However, even the second second is not final. As predicted by the theory of relativity, the length of time depends on the observer’s speed and gravity relative to the object. Gogas admits: “This worries about modern physics.” Therefore, when the laws governing the large and smallest quantum physical scales coexist for an instant, everyone turned their attention to the origin of the universe.
Maybe there is some key to reveal this partner, everyone claims to understand, even if they don’t know how to define it.
It is a matter of time before you know whether you are willing to disclose yourself relatively early in the current ongoing experiment. But how much is it?
For an astronaut flying at the speed of light, time passes more slowly than a sports car pilot. If you have a choice, working on the highest floor of a building is a good choice, because gravity will press on the hands of the clock and make the clock move more slowly on the lower floors. The same effect predicted by the theory of relativity is most pronounced in space. Javier Gorgas, professor of astrophysics, explained: “Close to very large objects, such as neutron stars, time slows down and it stops moving completely near the black hole.”