My thumb-and-forefinger astrocalipers say Mars over Phobos still beats it out, but it’s close.
Unless you’re including the rings.
Well, I hope you’re happy. I can see this is going to cost me pretty much an entire day’s worth of productivity.
RR
Well, it’s wasted plenty of my time… thought I’d allow others to do the same!
Well then we’d better not show you Celestia. 
I clicked on it. Heaven help me, I clicked on it.
And this is a remarkable picture.
So is this
If I get fired, it’s all your fault.
RR
It was for a good cause. 
Beat me to it. I’ve wasted many an hour touring around Celestia. Totally cool.
That is by far one of the coolest websites I’ve ever seen, thanks!
Dang, Meurglys, that’s an awesome link… Thanks for posting that!
looses too much time
I went to the NASA Simulator and asked for the Sun as seen from Mercury… but the result seems to show the Sun looking either pretty much the same size as it looks from Earth, or even a little smaller. I was expecting it would look larger than it does from here. Have I misunderstood something?
The problem is there’s nothing else to really give a sense of scale for the field of view. But if you use the simulator to give a view of the Sun from Earth, with the same field of view, it’ll be noticably smaller.
I think if we say Jupiter spans about 20[sup]o[/sup] you can imagine what that means by stretching your arm out in front of yourself and spreading your fingers. A spread hand covers about 15-20 degrees of sky.
That was either genius or the best unintentional double entendre ever.
I don’t know why Jupiter from Io would be the primary Jovian contender. It’s not the innermost moon, just the innermost of the really huge Galilean moons. Both Amalthea and Metis are closer to Jupiter.
