All through the X-Wing Series, we hear that Space Is Cold whenever there's a magnetic containment field up. Supposedly the mag-con field holds in atmosphere but can't stop heat. Then it occurred to me that all of the viewpoint characters are pilots. They can fly spectacularly, but most of them don't even know that there is no extruder valve on an X-wing! The heat loss could be from the mag-con field itself, and they explain it to themselves and each other differently. Similarly, Solo mentions Explosive Decompression, but in this series he's a smuggler who became a General! He just knows people die when out in space unprotected. The Medstar Duology seems to confirm this; a malfunctioning mag-con field chills the area it's covering. —Joysweeper
Besides which, space IS cold, just not very efficient at cooling things down. Considering that starfighter hangers are typically referred to as "chilly" when the bay doors are open, it's not exactly a huge stretch of real physics, especially when the bay doors would only be opened while facing away from any sources of light (and by extension, heat).
Magcon fields, as the name implies, use giant electromagnets to project the fields. Giant electromagnets are generally accompanied by giant cooling systems to accompany them, to make the workings more efficient.
By Isard's Revenge Ysanne Isard is no longer affiliated with the legitimate Empire of Thrawn and Pellaeon. She claims it is by her choice but evidence in The Bacta War (where an Imperial warlord only very reluctantly loans her ship — and then lectures her when it is destroyed) implies she has a acquired a reputation as a General Failure and it may actually be the Empire that wants nothing to do with her.
This may also have to do with an unusually strong case of Jurisdiction Friction. Think about who's in charge of other parts of the Empire: Captain Pellaeon, Admiral Daala, Admiral Teradoc, Warlord Zsinj... all military officers, many of them career military men with long pedigrees and long careers, who were all uncomfortable to be taking orders from an Intelligence agent to begin with (her habits didn't help).
In The Courtship of Princess Leia, Warlord Zsinj is said to be a "compulsive liar". While he does engage in some deception in the Wraith Squadron trilogy, there's always a purpose behind it (Obfuscating Stupidity if nothing else), and he rarely does so when no advantage would be gained (a true compulsive liar would not have such restraint). But if you look back to the Gambit Pileup in The Krytos Trap, where his claim to destroying Rogue Squadron turned out to be false (but, as the reader learns, not a lie), combined with Wraith Squadron's encounters, it's easy to see how he came by that reputation.
You'd initially think that, given the careful suppression of all other evidence for the existence of Isard's Lusankya prison facility, that the mind control victims started endlessly repeating "Lusankya" after they were triggered would be a pretty big security problem. But if you think about it, Isard is in her own way an extraordinarily egotistical person. Combined with the terror value of creating an aura of mystery around the place, she probably couldn't resist the opportunity to "claim" her mind controlled agents that way.
Yeah, I think Isard's security concerns were mainly with ensuring that no one knew where or what Lusankya was. I think she'd love the idea that the public face of the prison would be broken zombies repeating its name obsessively after doing something heinous. Plus, it works; no one until the end of The Krytos Trap had any idea that it was really a Super Star Destroyer buried beneath the surface of Coruscant, not even Tycho who'd actually been imprisoned there before.
In Wedge's Gamble, the assault force against Coruscant consists of maybe a half-dozen capital vessels and a larger, but still small, fleet of gunships, transports, and fighters. The defense force is smaller still. Why are the units involved so small? (For comparison, in Solo Command the climactic battles involve 10-20 capital vessels per side, whereas in Iron Fist at least a dozen major capital ships are defending Coruscant.) In Isard's case it was deliberate, since she wanted the "Rebels" to have the planet — but the New Republic may have been playing a con themselves by sending a very large force running up to some nearby, critical system to draw away Imperial defense assets, a tactic they had used in the previous book. Sure, Isard might see through it, but since she wants them to win, it's no trouble to play along (and she does want to keep other Imperial possessions).
Imperial Center had several ships in position to protect it, but the crux of it's defense was the dual-layered forcefield surrounding the planet. Concentrating enough firepower to take down one section of the forcefield was considered suicidal, as you would be vulnerable to attack from the defensive ships and orbital stations. Taking out an entire layer was considered impossible. Taking down both layer simultaneously was beyond the pale, and never even considered as a possibility. The Rebels didn't consider the light starship count too suspicious because of the defense platforms and the forcefields
How is it that Tetran Cowell, Former Child Star, was able to learn how to pilot a TIE fighter well enough to not only mimic Baron Fel's fighting ability, but fool Wedge Antilles?
Probably the same tech that was allowing droid pilots.
Word of God: He and the rest of the bogus 181st were enjoying the benefits of computerized coordination from the Iron Fist (and, in an earlier scene, from the Reprisal — see Chapter 13), and this computer help allowed him to impersonate Fel well enough to fool even pilots who'd flown against him previously. (Remember that most pilots who'd flown against Fel previously were dead, so the survivors tended to be pilots who'd seen him from a distance or had their starfighters crippled early in an engagement. Most pilots' knowledge of Fel's flying technique comes from reviewing recordings, which isn't the same as facing him in person.) Cowall was also an excellent pilot, which helped the deception. Additionally, he won some matches through reputation; people would seize up at the thought of facing Fel and become easier prey. However, it's to be noted that until Solo Command, no one who'd previously flown against the real Fel flew against Cowall, so they couldn't put his real lethality to the test.
And once they were finally going up against each other, he didn't fool Wedge for long before Wedge put him down hard.
Who's to say that Cowell didn't join the Navy when he grew up and was a decent TIE pilot in his own right? A decent pilot, coupled with the aid from Iron Fist's computer, would have made him a truly fierce opponent.
Why hasn't magnetic containment field technology ever been applied to the bridge view ports of capital ships? On at least two occasions, the windows get blown out and it's a scramble to evacuate the bridge before the automatic door closes off and leaves the crew in vacuum. Magcon fields are simple enough to be part of pilot life support gear, and can be scaled up to keep atmosphere in an open hangar bay so it should be easy. It wouldn't protect the bridge against further battle damage, but it would keep the atmosphere in long enough for a quick, orderly evacuation of the bridge without further losses due to impatient blast doors.
The emitters for a magcon field would likely be destroyed by whatever was powerful enough to take out the window in the first place, i.e. a kamikaze A-Wing. The better question is why, with all the scanning and imaging technology available, they still rely on eyesight aboard capital ships, leaving such a vulnerable weakspot in the first place.
I don't think we've ever seen them actually rely on eyesight—the bridge having a view outside the ship may be strictly traditional, or for emergency use if and when the ship's scanners are down/blinded and you need to avoid hitting other ships.