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The sun is big and bright, so you can see it, and the moon is smaller, but it's very close to the earth, and there is sunlight.
Reflection, so you can see it too. Jupiter.
And Venus can also be seen, but it is difficult to detect with the naked eye, mainly because they are much farther away than the moon, although it is not as far away as the sun, but it is not as big as the sun, and it is not as bright as the sun, so it is invisible to the naked eye.
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People can see the sun because the sun is about 1.39 million kilometers in diameter and is extremely bright, and the light that passes through the atmosphere is enough to reach the earth's surface. Thus, on Earth, one can see the sun with the naked eye.
Jupiter, on the other hand, is a huge gas planet, about 140,000 kilometers in diameter. Despite its larger size, Jupiter is still small compared to the Sun, and it is a planet that does not itself have the ability to self-lumineous like the Sun. So, even if Jupiter reflects the Sun's rays, these rays cannot penetrate the obscuration of other celestial bodies in the solar system and reach Earth and be perceived by the human eye.
So, while Jupiter is one of the brightest planets in the solar system, we can't see it directly with the naked eye due to its distance and relative size.
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It can be seen with the naked eyeJupiter. 0:00 a.m. from the eastern horizon.
Rise. Then slowly ascend to the middle of the heavens. The trajectory is similar to that of the sun during the day. Just before dawn it was due south. Jupiter is now in Gemini.
During this time, it rises from the north-east direction at around 15 p.m. every day, and is located due east near the zenith at about 20:00 p.m., with a brightness of more than -2 magnitude, and is the brightest star of the whole day in the first half of the night, which is very easy to identify.
Formation of Jupiter
To form a gas giant like Jupiter.
A large amount of gas must be drawn from the protoplanetary disk. According to this model, because the solar wind gradually pushes other gases outward, the gas is already pushed away by the time the inner nuclei of the star system accumulate enough mass to attract air, so the inner planets in the star system tend to be rocky and the gas giants usually form on the outside.
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The Sun is the only star in the inner solar system that emits its own light. Other planets do not emit light, and humans can only see them by reflecting the sun's rays. Correspondingly, the closer a planet is to the Sun, the brighter its reflection becomes.
The Sun is the only star in the solar system that emits light and heat, but it is not the only object we can see. The eight planets in the solar system all reflect solar radiation, giving us a chance to see them.
Just like the Moon itself does not emit light, but the Moon can reflect the sun's light because the Moon is closer to the Earth, which makes it the brightest celestial body after the Sun. Human beings can see an apparent magnitude of about 6 when the observation conditions are better than those of the naked eye, so among the eight planets in the solar system, Venus, Mercury, Mars, Jupiter and Saturn are what we can see, while the observation of Uranus is really difficult, almost reaching the limit of human observation, Neptune is invisible to the human eye. And because Mercury is so close to the Sun, it is difficult to see with the naked eye due to solar radiation.
The Earth is the third planet in our solar system from the inside out, and astronomers refer to the Earth's orbit as the Solar System"Livable area"But in 1 billion to 2 billion years of solar luminosity, the habitable zone can move in the direction of Jupiter in the solar system, and the apparent diameter of Venus, the closest orbit to us, is greater than the resolution limit of the human eye. This means that the orbit of Venus can be seen with the naked eye! But why hasn't anyone seen it?
Venus is too bright to tell. In the universe, we can only see the earth and the moon with the naked eye, and we can't see any of the other stars, and all the stars we see with the naked eye are the sun, and these suns are born of stars and planets.
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Because the sun is relatively large relative to other forms, we can see it with the naked eye, but the other planets are so far away that we can never see them.
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Because the sun is the largest, plus the earth revolves around the sun, we can see the sun, and the other planets have nothing to do with the earth, so we can't see it.
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Jupiter can be seen when Jupiter opposition.
Jupiter opposition: Every 1 year and 34 days, Jupiter, the Earth, and the Sun are in a straight line.
Jupiter's opposition: Jupiter is closest to Earth, has the brightest luminosity, and is the best to observe. Jupiter's brightness does not change much in the months before and after Jupiter's opposition.
Jupiter is at opposition in the exact opposite direction to the Sun. In this case, Jupiter reaches its brightest and will be visible throughout the night.
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Excluding weather and geomorphological factors, Jupiter.
It is visible to the naked eye most of the time at night.
It is claimed that people with good eyesight can even observe Jupiter's four larger moons by using light shading to block Jupiter's body. However, there is a lack of effective substantiation of this claim.
Using ordinary binoculars, the four large moons of Jupiter can be clearly observed.
Use an astronomical telescope of 50x or more.
Streaks of the atmosphere on the surface of Jupiter can be seen.
People can't see the back of their heads, don't turn their heads, and the range of human eye viewing angles is about 150-160 degrees, and the effective viewing angle is about 90 degrees (greater than the resolution of this angle decreases).
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