Very very likely not the first. We‘ve had rovers on mars for about three decades now and all of them had cameras. Mars days are only slightly longer than earth days so there have been over 10000 opportunities to just point a camera at the horizon and take a picture.

I've seen blue sunset pictures from Mars before, but I suspect someone pumped up the saturation on this picture.

Elon Musk is a piece of shit.

I think it's mostly plasma actually.

Hell yeah! Earth stays Winning!

I think noone he just does that

It would be about 30% smaller. Mars is at 1.5AU from the sun, so 1-1/1.5 ~30%

I would guess it's essentially the same effect that causes our blue sky in the day and red sky at dawn and dusk. TL;DR if you already know what Rayleigh scattering is, skip to the last paragraph

Okay so the reason that we can "see" the sky, as in it is lit up and has colour, is that sunlight (which is basically white) gets scattered when it passes through the atmosphere instead of just going straight through. This is an effect called Rayleigh scattering. Rayleigh scattering affects shorter wavelengths more than longer ones.

If there is too much scattering of a wavelength, chances are that most of it will not make it to a given observer. It'll either just wind up going off into space or being absorbed by something. During daytime, our atmosphere does this just enough to get rid of most of the ultraviolet light. The next frequency down is blue, which gets scattered enough for us to see it.

For the sky directly above you to appear blue to you, you need some of the blue wavelengths of light to have made it to that point above you and then get scattered there. Other wavelengths need to have either been absorbed already (like UV) or not scattered much yet (like red).

During sunsets and sunrises, the light has to pass through much more atmosphere to get to us than it does during the day. As a result, the blue light starts to meet the same fate that UV does during the day, and longer wavelengths like yellow and red are the only ones that make it to us

So, all that is to set up that Mars has a way thinner atmosphere which does way less scattering. The sky normally looks more or less the same colour as the ground because there's so little Rayleigh scattering happening that dust kicked up by the wind dominates the colour instead. However, same rules apply as on Earth - sunset means more scattering. It's just that on Mars, that goes from UV scattering to blue, instead of blue to red.

Fuck off with grok

Dust in atmosphere multiplies the effect of Rayleigh scattering

Shun llm's. They aren't your friend.