Since there are trillions of stars in the universe, there may be billions of planets. However, since then, scientists have discovered more than 400 planets orbiting other stars.
Stars have their own light. All stars engage in nuclear fusion, and the fusion process emits radiation and energy. This energy takes the form of electromagnetic waves, and these waves are light. A star without light does not engage in fusion and, therefore, is not a star at all.
The planets in our solar system are much closer to the Earth than the stars, which means that the light they emit is brighter than the stars, although the planets do not emit their own light. The stars have their own light, and the planets do not have their own light, they reflect the light of the sun falling on the planets. Stars are farther from us than planets, the light of stars passes through different layers with different temperatures. Colder stars emit redder light; hotter stars emit blue or white light.
The Temperature of a star Determines Its Color
In addition, depending on the temperature of the star, the basic color of the light emitted by the star will change. The color of a star is determined by the strongest frequency of visible light and depends on the temperature of the outer layer of the star, including the photosphere. The brightness of a star is determined by its radius and surface temperature.
Their brightness depends on how much energy they emit, known as brightness, and how far from Earth they are. The stars shine because they are very hot (so the fire emits light because it is hot). Stars are huge celestial bodies made up mostly of hydrogen and helium that generate light and heat from turbulent nuclear forges in their cores. We tend to think of stars as the objects that generate most of the light in the universe, while planets, moons, rocks, dust, and gases reflect this starlight.
We have never noticed this phenomenon before, because the amount of reflected light is negligible compared to the huge amount mainly produced by stars. The source of this revelation is a new study of binary stars: the binary stars are trapped in a spiraling reverse orbit, and each binary star reflects a small amount of light.
Thoughts on Some Closeby Stars
The closest star to Earth besides the Sun is Proxima Centauri, which is 4.2465 light years (40.175 trillion kilometers) away. It is located about 150 million kilometers from Earth and is the only star in our solar system. However, life on Earth is possible only thanks to the light and energy of the Sun. Our Sun is a medium-sized star with a radius of approximately 435,000 miles (700,000 kilometers).
The Sun is a 4.5 billion year old yellow dwarf, a hot, glowing sphere of hydrogen and helium at the center of our solar system. Although the Sun is the center of our solar system and is essential for our survival, it is only a medium-sized star. From our point of view on Earth, the Sun may appear to be a constant source of light and heat in the sky.
But the Sun is a dynamic, ever-changing star that sends energy into space. The sun is a huge sphere of hydrogen and helium held together by their own gravity. Like a star, the Sun has no moons, but the planets and their satellites revolve around the Sun. A planet is a celestial body that revolves around a star in its solar system and receives its glow from sunlight reflected from the planet’s surface.
Why Stars Glow in the Sky
The stars seem to glow due to the constant refraction of light in the Earth’s atmosphere. An important feature of the stars is that they glow because when the star’s light hits the earth, it passes through the Earth’s atmosphere and due to atmospheric refraction they appear to glow. Many other stars are visible to the naked eye at night, but due to their great distance from Earth, they appear as fixed points of light in the sky.
There are millions of tiny twinkling lights in the night sky, some of which are stars and some are planets. The moon, planets, asteroids, natural satellites, and comets all shine with reflected light from the sun.
When we see planets such as Venus, the so-called “Evening Star” in the night sky, we see reflected sunlight. If you could see stars and planets from space, they would both be constantly glowing. There would be no atmosphere that would interfere with the constant flow of their light.
Experienced observers can often do this, but first, if you can recognize the planet in some other way, you can notice the stability of its light by comparing it to the nearest star.
A Non-Glowing Star Is Probably Just a Planet
If you see an unusually bright star, especially when you can’t see it glow, it is very likely that it is indeed one of the planets. Depending on the cloud cover and your location, you may see countless stars covering the sky above you, or not at all. If you stay away from the lights of the city and the night is clear, you should see beautiful stars twinkling at night.
Just think, the light from these stars has traveled light years in space to reach your eyes. All stars, like our Sun, emit enormous amounts of electromagnetic radiation, including light. And starlight travels a very long distance to reach us. Because the stars we can see with the naked eye are many light-years away and emit their own light as their light penetrates the various layers of the Earth’s atmosphere, it folds and breaks, causing the star to shine.
When you look at a star like Sirius about 8 light-years away, you see photons that left the star’s surface 8 years ago traveling through space without encountering anything. All the light they reflect comes from far away and isn’t enough to be detected or used. Also, some stars are simply larger than others and emit more light.
Spectral Analysis Is Used to Identify the Composition of Stars
Using special tools, we can find dark lines in the spectrum that correspond to the elements in the star. The first method is to look at the spectrum of stars (formed when we spread light from a star of different colors, like a rainbow). In ancient astronomy, astronomers studied the movement of that particular light source over several nights to determine if they were looking at a planet or a star.
Celestial objects that have a fixed trajectory (orbit) along which they move around a star are called planets. Basis for Comparison Stars Planets Meaning Stars are astronomical objects that emit their own light, resulting from thermonuclear fusion occurring in its core. Stars are composed of gases such as hydrogen, helium, and other similar light elements. A star flickers or twinkles because its gravity causes its gases to merge together.
From the earth, Sirius is the brightest star in the night sky, about 23 times brighter than the sun, while Canopus is the second brightest star in the night sky, with an absolute magnitude of -5.53, which is about 14,000 times brighter than the sun. Sun. It mainly emits light in infrared light (I think this is where they found the “brown” part, which is actually dark red in our opinion), and it is not as bright as other stars.
