stars and planetsThe difference between stars and planets was their nature and composition. A star was a spherical luminous plasma condensed by gravity, like the sun. Stars generate energy through nuclear fusion reactions and radiate the energy into outer space. Planets, on the other hand, were celestial bodies that orbited stars and usually did not emit light. Planets were composed of solid, liquid, and gas, unlike stars, which had high temperatures. Stars were usually more massive than planets because stars could continue to undergo nuclear fusion reactions while planets could not. In addition, stars and planets moved differently. Stars moved on their own while planets moved around them. In short, there were obvious differences between stars and planets in terms of nature, composition, mass, and motion.
How are planets in science fiction different from real planets?Science fiction planets differ from real ones in multiple ways. Firstly, the laws of physics might be bent on these fictional planets. For instance, some might have gravity that behaves in an unusual manner to create more interesting storylines. Secondly, the ecosystems can be completely fabricated. Instead of the real - world ecological balance, science - fiction planets can host creatures and plants that are a product of the author's wildest dreams, and they can be used as a backdrop to explore various themes like survival, exploration, and the encounter of different civilizations.
Planets that become starsUnder normal circumstances, it was impossible for a planet to become a star. Planets lacked the conditions to form stars, such as mass and energy. However, recently, scientists discovered a huge hot Jupiter called KELT-12b, which continuously absorbed the energy of its star, and its volume and temperature were constantly increasing. If Kelt-12b hadn't been swallowed by its mother star, it might have become a new sun. However, this situation was very rare and required special conditions and processes. Therefore, under normal circumstances, planets would not become stars.
Picture of the Eight PlanetsThe following steps were used to draw a map of the eight planets:
1. Draw eight circles. When drawing, pay attention to leaving gaps. Don't completely close the circles. Also, focus on observing the gaps in the circles.
2. Give each circle a different feature, pay attention to the design and matching of features such as expressions, and draw a circle around the planet around the second and fifth circles.
3. On the small planets with facial features were written the names of Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
4. Mercury could be painted blue, Saturn yellow, Jupiter dark yellow, and Earth blue and green according to its characteristics. Through the above steps, one could draw a stick figure that showed the characteristics of the eight planets.
The novel " Mars of Paradise " is equally exciting. Everyone is welcome to read it!
Pictures of various planetsHe could refer to the book Planets, which contained a large number of pictures of the eight planets of the solar system (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune). In addition, there were many real photos of these planets on the Internet, such as:
- Mercury: There were real images taken by the Messenger probe from about 100 million kilometers away. You could see a large number of craters, highlands, mountains, valleys, plains, and cliffs, as well as white radiation patterns.
- Venus: Images taken by multiple probes over Venus, as well as some of the Venus landers such as Venus 9, 10, 13, Pioneer Venus, and Venus Express, were sent back. Rocks, highlands, and huge mountains (such as Maxwell Mountains) formed by solidified "not long" magma could be seen. There were few craters on Venus, and the largest was no more than five kilometers in diameter.
- Mars: There were many exploration vehicles and space orbiters on Mars, and they captured a large number of orange images of the surface of the Martian continent covered with hematite. From above, they could see the huge rift Mariner Canyon.
- Jupiter: There is no clear mention of the source of its image, but it can be found through the Internet.
- Saturn: There is no clear mention of the source of its image, but it can be found through the Internet.
- Uranus: There is no clear mention of the source of its image, but it can be found through the Internet.
- Neptune: There is no clear mention of the source of its image, but it can be found through the Internet.
The novel "Mars of Paradise" is equally exciting. Everyone is welcome to read it!
The Eight Great PlanetsThe eight planets of the Solar System were Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.
Mercury was the planet closest to the sun.
Venus: Its rotation direction is opposite to the revolution direction, which is different from most planets.
Earth was a planet inhabited by humans. It was the only planet in the solar system that had liquid water on its surface.
Mars: A planet that is thought to have signs of life, and humans have explored it more.
Jupiter was the largest planet in the solar system.
Saturn: Famous for its beautiful rings.
Uranus: The direction of its rotation is special and is not consistent with the direction of its revolution. It is a relatively unique planet.
Neptune was a large planet in the solar system that was far away from the sun.
The novel " Mars of Paradise " is equally exciting. Everyone is welcome to read it!
Solar System PlanetsThere were eight planets in the solar system, four of which were terrestrial planets (mainly composed of volcanic rocks and had solid surfaces), namely Mercury, Venus, Earth, and Mars. Earth was the most massive and largest of the terrestrial planets, with a diameter of 12756 kilometers. Earth's diameter was 1.05 times that of Venus, 1.88 times that of Mars, and 2.6 times that of Mercury.
The other four were gas giant planets. In descending order of size, they were Jupiter, Saturn, Uranus, and Neptune. Jupiter was the largest planet in the solar system, with an average diameter of 139822 kilometers. Its diameter was 1.2 times that of Saturn, 2.75 times that of Uranus, and 2.84 times that of Neptune. Jupiter's diameter was about 11 times that of Earth, its volume was more than 1300 times that of Earth, and its mass was 318 times that of Earth. Saturn's diameter was 116464 kilometers, which was 9.5 times that of Earth, and its mass was 95.18 times that of Earth. Uranus 'average diameter was 50724 kilometers, and its volume was slightly larger than Neptune, but Neptune's mass was two and a half times that of Uranus. Neptune's diameter was about 49244 kilometers, its volume was about 57 times that of Earth, and its mass was 17 times that of Earth.
Compared to the Sun, the Sun's diameter was 1392000 kilometers, which was 10 times the diameter of Jupiter and 109 times the diameter of Earth. The Sun's volume and mass were 1000 times that of Jupiter, 1.3 million times that of Earth, and 330,000 times that of Earth.
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The personalities of the eight planets1. Mercury was the smallest planet in the solar system. It was the closest to the sun and moved the fastest. The surface temperature was extremely high, reaching 430 ° C per day. Since there was no atmosphere, the temperature difference between day and night was extremely large. It was hot during the day and cold at night.
2. Venus: The surface temperature is as high as 470 degrees Celsius. The atmosphere is mainly composed of carbon dioxide. The clouds are thick, and the direction of rotation is opposite to the direction of revolution. It is one of the slowest planets in the solar system.
3. Earth: The home of humans. It is the only planet known to have life. About 70% of the surface is covered by water. The atmosphere contains oxygen and other gases. The environment is suitable for life.
4. Mars: There are a lot of impact craters on the surface, and there may be microorganisms. Similar to Earth, there are the North and South Poles, high mountains and valleys, white clouds, dust storms, and tornadoes. From space, it looks fiery red because the surface material contains iron dioxide.
5. Jupiter: The largest planet in the solar system, known as the "Solar System Giant." Its mass is 2.5 times the mass of the other seven planets combined, and its volume is 1316 times that of Earth. It has a strong magnetic field and storms, and many satellites.
6. Saturn had the most number of moons. Colorful clouds floated on its orange surface. There were rings on the equator. The rings were made of ice and rock. It was one of the most beautiful planets in the solar system.
7. Uranus: One of the coldest planets in the solar system. Its surface temperature is-210 degrees Celsius. Its axis of rotation is severely tilted, causing extreme seasonal changes. It moves around the sun in a "lying" position at a 97 ° angle to its orbit.
8. Neptune: The most distant planet in the solar system. The surface temperature can reach-220 degrees Celsius. The atmosphere contains hydrogen, helium, and methane, and it has a dark blue appearance. The surface storm is the most violent among the planets in the solar system. The speed can reach 1000 kilometers per hour.
The eight planets, UranusUranus was the seventh planet in the solar system. It had the third largest planetary radius and the fourth largest planetary mass. It had a similar chemical composition to Neptune and was quite different from the gas giants (Jupiter and Saturn), so it was classified as an "ice giant planet." It was discovered by William Herschel in 1781. He initially wanted to name it after King George III, but failed. Later, it was named after the Greek god Uranus by John Eller Bode.
Uranus was formed by the splitting, gathering, collision, and annexation of primitive nebulae. Its interior was mainly composed of ice (water ice, methane ice, and nitrogen ice) and rocks. The atmospheric temperature was-224 ° C (-371 ° F), and the contents of hydrogen and helium were 82.5 + 3% and 15 + 3% respectively. Like other planets, it had a ring system, a magnetic layer, and many satellites. There were currently 13 known rings, 3 billion kilometers from the sun, and it took 84 years to orbit the sun. It was also the only planet in the solar system that was lying down and rotating.
In 2004, NASA's Hubble telescope observed a black hole on Uranus, and scientists inferred that there was a "diamond rain" on Uranus and Neptune. Voyager 2 and the Hubble telescope observed a lot of information about Uranus. In April 2023, NASA's James Webb Space telescope captured images of Uranus's ring. It was believed that the earthquake in the sea near Sumentara in 2011 was related to the magnetic field of Uranus; in August 2022, there was a retrograde movement phenomenon, and in November of the same year, a total lunar eclipse and the moon occulted Uranus at the same time. The scientists also proposed an experiential structural model for Uranus and Neptune, suggesting that the rotation period of Uranus should be changed to 16.57 hours. There were also three-layer smog models that reflected the similarities between Uranus and Neptune.
In terms of volume, among the eight planets in the solar system, its surface area was 8.116 billion square kilometers, second only to Jupiter and Saturn. It was larger than Earth and could accommodate about 47 Earths. In astrology, Uranus represented revolution, change, and transformation. It was the guardian star of the eleventh constellation, Aquarius. In Greek mythology, China culture, war code names, and music, Uranus also had elements. In addition, NASA plans to visit Uranus again to explore its moon using new computer models to find hidden liquid water oceans.
The novel "Mars of Paradise" is equally exciting. Everyone is welcome to read it!