It really doesn't matter, he has lifted infinite weight do whatever you use to get the mean, it will always be infinite weight. But superman doesn't lift infinite weight everyday so I believe on average (i agree with beinsalsa) he lifts whatever he has to, whatever he has to or whatever needs to be done.
I've gotten into this with people in the past, that his greatest lifting feats have come when he's flying. So he's using a different powerset when he's holding something in mid air; it's not a feat of strength, but an extension of the inner telekenesis that allows him to fly and hover in place.
You just have to look at the many non-flying characters who have repeatedly been able to match his strength - Darkseid, Orion, Mongul, Doomsday, Solomon Grundy - none of whom have strength feats on the books as dramatic as Superman's. That they are in his strength class comes right from DC editorial and from character statements made through the decades.
The alleged planet moving feats of years past - it can't happen unless he's flying; he can't stand on one planet and push another. Hence, different powerset at work.
__________________
"I'm not smart so much as I am not dumb." - Harlan Ellison
If He Is In The Sextillion Range That Means He Is Just As Good Enough To Lift One Planet(Refering To Our Own Planet Which Weighs 6.6 Sextillion As I Heard) When Clearly Supermam Can Lift More....
This was how Byrne portrayed it. Don't know if anybody else actually followed it. The way you're doing this feels like you're grasping at straws to say Superman isn't really as strong as he is.
Salsa already pointed-out two massive feats of strength(both that put moving a planet to shame) that he was NOT flying when he did them, so I won't go on that. The other serious flaw in your argument is bringing-up non-flying characters. So what that they've matched him in strength despite not having strength feats like his? None of them really even HAVE feats of strength. The only major one I can think for any of them is Darksied ripping-apart that planetoid as a side-effect of his fight with Superman. All of them but Solomon Grundy(since he's been at different power levels pretty much every time he comes back from "death" are all consistently stronger than Wonder Woman, despite they don't have feats to match her's, and she just flies through magick, you can't make an argument of "telekinesis" here. Kurse and Mangog are stronger than Thor, but what feats of strength does they have to compare? I could be wrong, but to my knowledge, the answer is "none."
The problem with that is that you're not working against the earth's gravity when you move it.
The centrifugal force of the earth orbiting the sun is cancelled out by the sun's gravity on the earth, so it's in balance. If you were to increase the earth's speed then the shape of the orbit around the sun would become more and more elliptical until it reaches a point and starts spiraling away.
I could make a calculation on it if there's an interest, and explain exactly how much energy would be required before that occurs. It's basic Newtonian mechanics.
Wasn't that with the help of Captain Marvel? Ultraman managed to lift it alone, though.
Nevermind I just checked the numbers, you can't break the orbit unless you have an interference of external gravitational fields. Then again, if you speed it up or slow it down to where the ellipsis goes through the sun then that should be enough. Slowing it down would be the most energy efficient.
Are there many instances where Superman was unable to lift something and it wasn't do to lack of power but instead some outside factor like being weakened?
Seems he's as strong as he needs to be for the given occasion, majority of the time.
The scene didn't show Superman REQUIRED Captain Marvel's help as much as he wasn't sure it was possible to even lift it, and had Cap help him. If Ultraman lifted it on his own, I'm sure Superman can.
Last issue of Superman he benched the weight of the earth for 5 days.
__________________ What is good?--Whatever augments the feeling of power, the will to power, power itself, in man.
What is evil?--Whatever springs from weakness.
What is happiness?--The feeling that power increases--that resistance is overcome.
Not contentment, but more power; not peace at any price, but war; not virtue, but efficiency (virtue in the Renaissance sense, virtu, virtue free of moral acid).
The weak and the botched shall perish: first principle of our charity. And one should help them to it.
What is more harmful than any vice?--Practical sympathy for the botched and the weak--Christianity...