Mars is called the "Red Planet" because we usually think of it as orange or red. However, some recent photos of Mars circulating on social media show different colors, leaving people confused about the true color of Mars.

The photos were posted by a Twitter account called "Latest In Space," which has more than a million followers and reports on events in space in real time. On August 8, the account shared a series of images of Mars taken by the Mars helicopter Witty, which is part of NASA's Mars 2020 mission and will regularly fly over the planet and send photos back to Earth. Here are some of the latest photos:

As you can see from these photos, Mars looks very ordinary, with an almost blue sky, brown land and large rocks. It's like it was taken in a desert somewhere on Earth, and Mars doesn't have that red hue.

It's a big difference from the pictures we've seen of Mars before, which always show a dark red ground and cloudy orange sky that feels mysterious. Many people were very confused by this, with one person writing on Twitter: "I always wondered why previous Mars photos (don't know why) always had an orange tint, as if a filter had been added to the photo. Now we see pictures like this, it looks like the Earth... Which is it?" "The sky on Mars used to be orange, so why did it use filters? They acted as if Mars was having constant dust storms for twenty years." "Said another.

The images have also sparked conspiracy theories that NASA has retouched images of Mars in the past, adding a red filter to them. "NASA used to put a red filter on all images from Mars, but suddenly stopped doing that a few years ago." "Someone tweeted.

In fact, such conspiracy theories have been around for decades, ever since NASA's Viking 1 spacecraft first landed on Mars in 1971. In the first images of the so-called "Red Planet," the sky appears blue and the landscape is relatively Earth-like. However, in a later press conference, team member Carl Sagan declared: "Despite the impression given by these images, the Martian sky is not blue... It's actually pink."

Since then, it has been suspected that NASA manipulates the color of Mars to make it appear red and orange, but in reality the opposite may be true, and NASA may color balance the original image of Mars to show what the planet looks like under more Earth-like conditions.