with the huge numbers of teeny tiny patents nowadays, where most of them should never have been granted at all.

What, are you telling me that rounded corners shouldn’t have been patentable?

Not very ‘lightweight’ if all you need it to do is read PDFs.

Another vote for Okular.

KDE default, and it’s always worked fantastic for me in the past. Actually, lol, I was just giving a presentation a couple weeks ago using it, and – I am not making this up – one of the people in the audience was so impressed he came up to ask me what program I was using.

And I have a hard time believing that there isn’t some solid or liquid (or maybe some other exotic state of matter, due to the heat and pressure) inner core way down in there, even if it’s relatively tiny compared to the size of the planet.

Even if it was entirely made of gas when it formed, surely some materials would have fallen in over the eons that could stay solid/liquid at the pressure/temperature of a gas giant’s core?

Ah, but what if you brought a large balloon, inflated it, and flew a helicopter inside the balloon?

Sure. 25% --> 37% … as long as you (for some arbitrary reason) only consider 8 “places” in the solar system.

7 of those are planets, but Titan is a moon. If we’re going to include moons, then there’s going to be a whole lot more than 8 “places” in the solar system, so the percentage of places where helicopters can work is going to be greatly reduced. If we get really pedantic and consider any orbiting body in the solar system to be a “place”, then there will be hundreds, thousands of them where helicopters can’t possibly work, once you start tallying up asteroids and comets.

Also, why does the list include 7 planets, not 8? What? Are you not interested in trying to make a helicopter work on Mercury? That’s quitter talk!