Site icon Deep Sky

If you shine a flashlight into the sky, can light rays come out of the solar system?

If you shine a flashlight into the sky, can light rays come out of the solar system?

The modern scientific community generally understands that Oort Cloud in the outer solar system, consisting of small and large pieces of ice formed by a mixture of water vapor and dust, called comets, which surround the Sun to form a sphere with a radius of about 1 light year.

However, this is a hypothetical cloud, it is said that there are up to 10 trillion comet particles in this cloud, but they are scattered in a large space with a thickness of 1 light year . This rarity is beyond human imagination and therefore does not affect the observations of scientists.

NASA describes the giant Oort Cloud
NASA describes the giant Oort Cloud

NASA describes the giant Oort Cloud as “a large, thick-walled bubble made of icy space debris the size of a mountain and sometimes larger”. The Oort Cloud is named after the Dutch astronomer Jan Hendrik Oort. This astronomer discovered the cloud in the 1950s while studying why some comets in the solar system have elongated orbits.

is a distance scale, or simply understood, it is the distance that light travels in a year. Specifically, light travels at a speed of 299,792,458 meters per second in a vacuum, so according to the Julian year, a light year has a length of approximately 9.46 trillion km.

Because The solar system has a radius of 1 light year So if you shine a flashlight into space, in theory, of course, this ray of light will not be able to get out of the solar system in a short time, but it will take a whole year to fly to the edge of the cloud. Oort in the solar system, then flew out of the solar system.

But the problem is that the light from this flashlight will dim, when the movement of photons meets differently charged particles, they will interact with each other. As a result, it will be reflected, refracted and absorbed by different charged particles. The speed of movement will collide with the particles and absorb several times in a very short time, so the light is weak from the outside. The flashlight will disappear in less than a second after turning off the light.

Shine the flashlight to the sky

These gamma burst They occur almost every day, they are sudden and only appear for a few short seconds. There aren’t many documents to search for, so the explosions that cause them remain a mystery. Scientists believe they are born from neutron star collisions or supernova explosions – the moment when a star runs out of energy, collapses under its own gravity, becoming a neutron star or black crater.

Even in the space beyond the Earth, it seems to be in a state of high vacuum, but there is no absolute vacuum in space, so the faint light of the flashlight will quickly disappear in the space. ‘space.

A The more photons a light source emits, the greater the energy of the photon., the further they can travel, which is why light from larger stars can travel farther, even hundreds of millions of light years, and can be seen with telescopes. The more energy a galaxy radiates, the farther its light spreads; Gamma-ray bursts are light rays with the highest energy, so the distance traveled can reach billions of light years.

Heo Science Times, gamma burst known as the strongest and brightest explosion in the universe. Scientists believe that these super-bright flashes are created when black holes form and that they emit as much energy as the Sun emits in 10 billion years.

The first gamma-ray burst was detected in July 1967, at the height of the Cold War. The United States launched satellites into space to locate Soviet nuclear weapons. Two satellites named Vela 3 and Vela 4 observed flashes of high-energy photons, called gamma rays.

Gamma-ray bursts typically last from a few seconds to several minutes and originate from the formation of a black hole accompanied by a radiated supernova or neutron star collision.

A gamma-ray burst can emit an amount of energy equivalent to that produced by a supernova, but in seconds or minutes rather than weeks. Their maximum luminosity can be 100 billion times that of the Sun and 1 billion times that of the brightest supernovae.

According to NASA, there are 2 types of gamma-ray bursts: Long-duration gamma-ray burst and short-duration gamma-ray burst.

Long-lasting explosions can last from 2 seconds to several minutes, with an average of 30 seconds. This type is associated with massive star collapses, although not all supernovae produce gamma-ray bursts.

Short bursts last from a few milliseconds to 2 seconds, with an average of 0.3 seconds. They are associated with the merger of a neutron star with a completely new black hole or with a black hole from a larger black hole.

Article source: PNVN

If there is an error with the article If you shine a flashlight at the sky, can light rays come out of the solar system?, or if the content is inaccurate, please contact us so we can correct it .


The modern scientific community generally understands that there is an Oort cloud in the outer solar system, consisting of large and small ice masses formed by…

Exit mobile version