ChrisSpace

That was my mother's favourite part of it when I showed her the trailer. THIS. For years we've all wanted things like high-tech engines, multiplayer, colonisation, interstellar travel, more worlds to explore etc. And now we're finally getting it. Well, not now but rather late next year. Still, good enough.

This aged brilliantly

So, after re-watching the trailer, here's everything new I noticed: 0:12 New lens flare? Also clouds but I have my doubts they'll be in the game. 0:24 Some new engine on the orbiter vehicle? 0:48 Landing feet push up the soil a bit. I have doubts about this. 1:03 Valentina looks different, but I can't quite tell how. The hair I think? 1:19 New engine flame appearance? 1:24 Snowflake things falling off the rocket, probably not going to be in the game. 1:25 Sonic boom thing, idk what it's called. 1:28 Gravity-style collision with some part of a space station shattering into lots of little pieces. 1:29 Buildings?! That can't be for real. 1:36 Spinning habitat, new spaceplane parts. 1:38 New surface terrain on Duna, plus the colony obviously. 1:40 New rover parts. 1:42 Nuclear pulse propulsion, looks too good to be true so I have my doubts. 1:43 An asteroid field or planetary rings or something? Maybe this is inside the rings of that planet we see later in the trailer? 1:45 Jool looks way better. 1:47 Fusion-drive spacecraft over Jool, maybe Jool is the only place where you can mine fusion fuels like Helium-3? 1:54 Two volcanic bois. IIRC there used to be a plan to add lava lakes to Moho, looks like we're finally getting them somewhere. 1:56 Another new engine type, plus a new spacecraft module with sparks flying out of it. 1:58 New gas giant, presumably not in the Kerbol system since it has a moon with liquid water. 2:02 So it looks like this is going to be the Laythe of KSP2. I mean, Laythe will still presumably exist but this'll be the next habitable world. Also note that the landmasses appear to be covered in snow. 2:06 Glacial surface terrain. 2:10 Big domes with plants in them. Possibly the largest colony modules in the game. 2:15 All the domes appear elevated above the ground. I can't tell why. In the end, I'm guessing 40-50% of these things are actually going to be in the game.

Clouds were shown in early official art for KSP1 too.

How much thermal energy would I have to give the asteroid Eunomia in order to make it glow as hot as possible (without the asteroid melting/evaporating)?

Is this just an estimate or did you calculate it?

It's part of a spaceborne creature design I'm working on as part of Spaceception's novel project. Since the creature's main body is basically a sphere, I figured this'd be a good way to determine what kind of metabolic rate it would need to have to maintain it's core body temperature. And as for my second question, I'm trying to figure out how the [REDACTED] the Morrigan-class patrol destroyer from The Expanse can hold over 28000 metric tons of propellant in it's little body, as stated on the wiki. Liquid Mercury is the densest liquid I can think of, so... Well, that's a problem. Is there any other really-high-density propellant (over 10g/cm^3) that could do better? What about Ruthenium or Rhodium or Molybdenum?

Thanks. So, another question I have is this: Let's say I've got a rocket engine design that works by heating up liquid mercury and shooting it out the back, like an NTR but much hotter. If the mercury is heated to 100 million K, what should the expected exhaust velocity be?

This one may seem a bit odd out of context, so bear with me: Let's say that there's a sphere 70 meters in diameter orbiting as far from the sun as saturn, with a density and thermal conductivity comparable to living flesh. How much extra thermal energy (In W or kW) does the interior of this sphere need to produce to maintain an average temperature somewhere in the range of 10-40 degrees celsius?

In the scenario @Spaceception and I are working on, it's neither of those. Centuries ago, the colonisation fleet (which was exiled from it's home solar system due to a system-wide interplanetary war) began to set sail towards Earth because it was the only planet within a hundred ly or so that was fully habitable for them, no terraforming required. When they got closer they started to pick up radio transmissions and they started to detect industrially-produced gasses i the planet's atmosphere. This made Earth even more of a target since all that infrastructure (power plants, mines, factories, logistics hubs, airports, etc etc) could be taken over and used by the fleet's species instead. Needless to say, things don't go as planned in the novel, but the concept remains the same.