Harianjogja.com, JAKARTA – Netizens are busy discussing the unusual color of the sun. These days, netizens say the sun has turned white, different from usual which tends to be reddish yellow.
Finally, many say that it is a sign of the end times, aka the apocalypse. really?
This assumption refers to one of the predictions of Sabdo Palon Noyo Genggong, it is stated that one of the signs of a pralaya or change from the old age to the new era is the occurrence of solar pethak.
Researcher from the Center for Space Science (Pussainsa) LAPAN, Andi Pangerang in his writings on the official Pussain website, explained that literally, the sun appears to have turned white, which can be interpreted as a twilight realm or the day is dim like night.
The day in question here is calculated from sunrise to sunset. The sun’s rays, which are usually reddish at sunrise and sunset, will turn white, while when the sun rises, the sun’s rays are not so hot because they are blocked by a kind of cloud.
“This incident can last for seven to forty days at most,” he wrote.
If it is associated with the Surya Pethak phenomenon, namely the Sun that turns white during the day from sunrise to sunset, there is a possibility that clouds that can block sunlight through the Earth’s atmosphere can be caused by volcanic eruptions or changes in sea water circulation that can increase evaporation of water vapor.
It is very unlikely that the cloud cover that covers the Earth’s surface is caused by a prolonged decline in solar activity, as happened from 1645 to 1715.
The phenomenon is also known as the Maunder Minimum, after the solar astronomer Edward Walter Maunder and his wife Annie Russell Maunder. This phenomenon occurred during the “Little Ice Age” or low average temperatures for the European region for a long time, between 1550 and 1850. However, there is not enough evidence that this Maunder Minimum could have caused the Little Ice Age, moreover, early The Little Ice Age was a hundred years earlier than the Maunder Minimum.
He explained there is a reason why the sun and sky appear reddish at sunrise and sunset, and why they are white and the sky blue.
The sunlight we see belongs to the electromagnetic radiation emitted by the Sun, known as visible light, looks white but consists of a spectrum of colors having different wavelengths, of which purple has the shortest wavelength and red has the longest wavelength.
The spectrum of different colors can be observed through a prism or when a rainbow appears in the sky.
Sunlight that comes to Earth before first passes through the Earth’s atmosphere. Well, because Earth’s atmosphere is mostly composed of gas molecules, with oxygen (O2) levels around 21% and nitrogen (N2) around 78%. In addition, water molecules (H2O) in the form of droplets (water droplets), ice crystals and water vapor, as well as particles such as dust, pollutants and ash can be found in the atmosphere, where the larger molecule density is closer to Earth and the density decreases with time. with increasing height from the Earth’s surface.
When sunlight meets gas molecules such as nitrogen and oxygen, spectra with longer wavelengths, such as red, yellow and orange, will easily pass through the Earth’s atmosphere. Whereas light with shorter wavelengths, such as blue and purple, is absorbed and then scattered in all directions by gas molecules.
So, when you look at the sky during the day, the blue and purple spectrum scattered in all these directions will reach our eyes. However, the human eye is more receptive to blue frequencies than purple frequencies, so the sky appears blue.
This phenomenon is known as Rayleigh Scattering. This phenomenon is named after the British physicist John William Strutt, also known as Lord Rayleigh. In addition to making the sky look blue, this phenomenon is also the reason why the Sun looks yellowish during the day even though the Sun’s light is white.
Meanwhile, when the sun culminates or reaches its highest point above the horizon at midday, light will travel a shorter distance as it passes through the atmosphere. This means that most of the yellow, orange, and red spectrum will pass through the atmosphere. Meanwhile, a small amount of blue and purple light is scattered and removed from the mixture of various spectrums. Therefore, the Sun will appear yellow to us on Earth.
long distance
Furthermore, when the Sun rises or sets, at which point the Sun appears closer to the horizon, the Sun’s rays will travel longer distances and through the denser layers of the atmosphere to reach the observer’s eye. Rayleigh scattering causes most of the shorter wavelength light such as blue, purple, and green to be scattered several times, leaving only the longer wavelength light such as red, orange, and yellow which will be passed into the observer’s eye. That is why, when the Sun rises and sets, the color of the sky will appear reddish orange and the Sun will blush very beautifully.
This ideal condition will only happen if the air quality is really good and clean. This is because the quality of the air through which sunlight will pass can also affect the color of the Sun at sunrise and sunset. Particles of dust and pollutants tend to reduce the color in the sky and block light from reaching the eye of an observer on the Earth’s surface.
Because of this, the sky is a dull red and yellow when the air is full of dust and pollutants. This is why sunrises and sunsets in rural areas, by the coast, and in the desert are so much more beautiful and colorful than in urban areas.
The sun is white and the temperature is cooler
Andi Pangerang also emphasized that there was no relationship between the solar cycle and the cooling of the earth’s climate.
“There were rumors circulating that there would be no maximum solar activity in the current 25th cycle, so the Earth’s climate would be colder than before. That’s not true,” he wrote.
If we are indeed headed for a prolonged minimum of solar activity and if such conditions do signal a cooler climate which neither of these is proven, this would not contradict the evidence that Earth’s climate is warming due to human activity. Cooling from a prolonged minimum of solar activity is unlikely to reduce human-caused warming in the long term.
Source: business.com
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