Questions about Death Star MKII

[ol]
[li]When did it become canon that the second Death Star was substantially larger than the original? At least watching RotJ I didn’t see anything in story to support that.[/li]
[li]Why make the second one bigger, especially when it was a plot point that the Empire was struggling desperately to get the superlaser online in time. Didn’t the original work just fine? (well, except for that little oversight with the emergency reactor vent).[/li]
[li]Is there a rationale for the Death Star’s design? That is, why does it have a polar axis with latitudinal decks? What’s the conspicuous equatorial trench for? Why is the reflector dish centered neither on the equator, the poles, or exactly inbetween?[/li]
[li]Does the large-scale patterning on the surface mean anything?[/li][/ol]

And why couldn’t those guys get a railing? Because they’d be leaning on it? Geeze…!

The first Death Star could fire only once a day, and only at full power; the second could fire more often, and at low powered levels for shipkilling purposes instead of just smashing planets. The larger size probably was required for the higher power production. From the Star Wars Wiki Wookipedia:

Why not have decks if you have gravity? And a spherical design gives the most volume for the least amount of material.
I believe your other questions all should be answered by the Imperial School of Space Craft Design.

It was a plot point that the Empire wasn’t struggling desperately to get the superlaser online in time. What the Rebels thought they knew was a deliberate fabrication meant to lead them into a trap.

That was my thought all through “The Hobbit” (part I.) Doesn’t anybody around here believe in safety railings?

No OSHA in Middle Earth

Railings where? In the goblin mines?
Goblins are cannibals. No rails means more meat.

ETA- also, neither dwarves nor elves need safety rails.

So here’s my question: Whose large capital ships was the Death Star Mk II going to target? Who, in the Rebellion, was in possession of a stolen Star Destroyer, or worse yet, was building them? My memory is pretty sketchy, and I only saw it on TV, so I might not have notices, but I didn’t notice the Rebellion fielding any large capital ships. Maybe something big fled Hoth and I missed it, but I don’t recall anything jumping out of hyperspace around Endor that squads of Tie fighters couldn’t handle

The EU explains a lot of that, of course. There were forces outside the Empire that quite powerful ships and weapons. The Mk II was designed to take on them after the rebellion was crushed.

Rewatch the ROTJ space battle: There are several large cruisers in the rebel fleet that seemed to rival the Star Destroyers (though certainly not the Super Star Destroyer) in size.

Watch the space battle at the end of RotJ. While the Rebellion may not have had anything quite as large as a Star Destroyer, they had a number of Mon Calamari capital ships, and a bunch of other mid-sized capital ships – some possibly stolen from the Empire, others either refitted civilian craft, as the Mon Calamari ships were, or out-of-date craft (because beggers can’t be choosers).

Edit: ninjaed!

The trouble with using Mon Calamari ships is all the bureaucratic hassle in getting them. You think you’ve filled out the the last requisition form and there’s always one last regional governor to placate.
Yeah, yeah, yeah… it’s satrap…

Ohh. OK. Could you name a few, and I’ll go read on Wookiepedia about them? Then I can find the others. I am kinda sucked into the whole canon/fanon backstory of the Empire. The only real enemies I heard of to rival the Empire are the Yuuzhan Vong and they shouldn’t be known to the Empire at this point … or were they?

Well, the Empire definitely knew about the Chiss Ascendancy, for one. Not to mention the Vagaari Empire.

Of course, the real reason the Mk II was bigger and badder was that the contractors had lobbyists in the Senate who padded the shit out of the defense contracts.

“Spherical” because that’s the most economical shape for an object that large. Both in terms of maximizing volume and in terms of minimizing it’s own gravitational forces.

The strategic purpose of the Death Star was it’s deterrent value as a planet destroyer, not as an anti-capital ship weapon. IOW, if your system gets too much out of line, forget a blockade of star destroyers and an invasion of storm troopers. The Empire will just destroy your planet.

The contractor was coming in on Tuesday.

What I meant was why wasn’t the Death Star built as concentric spheres with decks parallel to the surface?

It was.

Quoting from the Technical Manual:

The Death Star had been designed to operate
and behave much like any planetary body. The
majority of the “habitable” areas were on the
surface or within the two to four kilometer thick
crust. The rest of the vast interior consisted of
machinery, engines, nearly-bottomless access
and ventilation shafts, banks of computers, and
the power core.

Gravity within the battle station was handled
by omni-directional gravity boosters built into
decks, walls and ceilings. These gravity boosters
changed orientation as easily as flipping a switch,
and they were designed to allow the gravity
orientation to be altered from sector to sector, or
even from corridor to corridor. While hangar
bays imposed gravity perpendicular to the Death
Star’s core, adjoining corridors shifted the gravity
orientation to coreward.

The bit about using the superlaser against capital ships isn’t just some bit of glorified fanwankery that made it into one of the official technical manuals-- We actually see it being used in exactly that manner on-screen in Return of the Jedi. Sure, its primary purpose is to destroy planets so you can threaten them into staying in line, but if an enemy fleet shows up while you’re trying to do that, you want to be able to fight them off first, and zap the planet after you’ve taken care of that detail. The planet isn’t going anywhere, after all.

All you ever wanted to know about the second Death Star.