How many big planets are there in the universe? What color are they?

The eight planets are Neptune, Uranus, Saturn, Jupiter, Mars, Earth, Venus and Mercury in the order of distance from the sun. Because of different surface materials, they show different colors.

We can observe Neptune through binoculars. It is blue because the atmosphere around Neptune is rich in methane, which absorbs the red light of the sun.

Uranus is also blue, but compared with Neptune's blue, it should be considered sky blue. Because the atmosphere around Uranus contains 83% hydrogen, 15% helium and the remaining 2% methane. Like Neptune, methane will appear blue after absorbing the red light from the sun, but the color is not so bright because of its low methane content.

When we observe Saturn from the earth, we can see two obvious rings and a dim ring. To the naked eye, Saturn is yellow.

Jupiter is colored. Because the clouds on its surface are mixed with a mixture of sulfur, there will be some subtle differences in chemistry, which will bring colorful effects to our vision.

Mars is red and its name comes from this color.

Needless to say, the planet we are most familiar with is also blue.

Venus is golden, the brightest planet except the moon and the sun, hanging in the universe like a diamond.

Mercury's landform is similar to that of the moon, and the surrounding atmosphere is thin, so it is also golden yellow.