There are also aurora on the outer planet

  Aurora sometimes appears in the north and south poles of the earth. They are like ribbons woven from light, illuminating the night sky, so beautiful that people can’t take their eyes off. However, the aurora is not the exclusive beauty of the earth. Aurora will also appear on some alien planets.
Solar wind + magnetic field + atmosphere = aurora

  The formation of aurora is related to the sun. The sun emits a large number of charged particles, blowing around at high speed, forming a solar wind. When it reaches the earth, it will be blocked by the earth’s magnetic field, and flow into the polar regions along the direction of the magnetic field, and collide with the molecules in the atmosphere, thereby producing magnificent aurora. Some other planets also have magnetic fields and atmospheres, so they can also produce aurora.

  Jupiter is an out-and-out bulk and the largest planet in the solar system. Not only is it large in size, but it also rotates very quickly, thereby obtaining a strong magnetic field, which is ten times stronger than that of the earth. Therefore, Jupiter’s aurora is much brighter than that on Earth, like a blue storm of lightning and thunder.
  Even without the solar wind, Jupiter can produce aurora, which is excited by Jupiter’s moons. Io’s volcanic activity is very active, ejecting charged particles to Jupiter, stimulating aurora.

  On Saturn, the strongest aurora is ultraviolet light, which is invisible to the human eye, so we have to use a special ultraviolet camera to capture it, but occasionally rare pink and purple aurora appear. The Saturn aurora has different daily activities, sometimes moving and sometimes static; compared to the aurora on Earth, which lasts only about 10 minutes, it can last for several days.

  Mars has only some local magnetic fields and a very thin atmosphere, but it can also produce aurora. Scientists believe that this is because the magnetic field can only block the charged particles, and because some of the charged particles in the solar wind, that is, “protons”, can bypass the magnetic field and directly hit the atmosphere to excite ultraviolet light. This is called “proton aurora”. On Earth, proton aurora only appears in a small area near the pole, but on Mars, proton aurora can appear anywhere.
Uranus and Neptune

  Uranus and Neptune also have aurora. Unfortunately, these two planets are too far away for us to observe. However, scientists can synthesize photos of Uranus aurora based on the data collected by astronomical telescopes.

The color of the aurora is determined by the atmosphere

  Aurora has many different colors: green, blue, yellow and even ultraviolet rays. Different gas molecules collide with the charged particles of the solar wind to produce different colors. For example, the most common green aurora on the earth comes from oxygen molecules, and the blue aurora comes from nitrogen molecules. The mixture of two colors can form a yellow aurora.