Would units in space interact with each other?

I know PA wouldn't have space battles, but it seems some units in PA can travel across space, then I'm curious to know, what would happen if your units meet enemy's units in midway when crossing the space?
My guess is they wouldn't interact with each other at all, cause they all use some kind of hyperspace engines for space travel.

Based on the video, for in system travel, I would guess they use some sort of rocket ship. I would hope that in the case two hit each other, they would explode.

Edit: If you are talking about asteroids/planets with engines then they could launch missile at each other like in the video.

I think if they were to add the realism of unit collision, it would steer too close to space combat. It is easy enough to convince ourselves that small things would practically never collide because there is so much space in space.

For bigger objects... I think defending against an asteroid attack by intercepting it with your own asteroid should be allowed.

There are constructors in the video travel from the moon to three asteroids without the use of rockets or cannons.
My question is based on the assumption that there are battle units that are capable of this, should they be able to shoot each other if they got too close?

It looks like little rocket ships with constructors on them in the video.

Those little planes was embed into the constructor's grooves, and their engines didn't activate until they detach from the constructor, so I guess they are just some kind of nano-planes, not space transporters. The constructor travel across the space by its own engines.

There was another part in the video which had units launch from the moon and float down to the planet on jetpacks. I suppose the question is then that if a rocket was being launched while the jetpack units were dropping would the units shoot at the rocket?

So maybe a more general question is this: Is the entire system fully 3D with one set of projectile phsyics or do different rules apply once a unit enters space? By this I mean that if two units somehow encounter each other in space then the same rules apply as for ground combat.

I'm not sure about this. If space combat can accidentally occur then people will want to find out how to make it accidentally occur. But if they can do that then there could be a UI for it. Then we have space combat where there wasn't supposed to be any space combat.

On this note, I am wondering if it is possible to use an asteroid with engines to intercept and collide (destroy) someone else's approaching asteroid. I would be very pleased if that was the case (it seems like it would be, but will it be built into the game to do it or do you have to just get "lucky" with your timing and path to target)... food for thought.

I guess launch units onto the approaching asteroid and destory the engines on it would be more cost effective.

It would be cool if the player can order his space units to intercept approaching enemy space units, but I think let space units use hyperspace engines for space travel and unable to use its weapons and can't be attacked during the journey (like ships in SOASE) would be nice too.

Don't bother with any hyperspace fluff, it is completely unneeded complication. Just have units fly between planets and disable them on the way if needed.

Although I'm not a adherent of narratology, I still think there should be something to explain why the space units are disabled, narrative elements might be not important for chess or Go, but they are important for a video game.

Maybe whatever wireless energy transfer tech they are using doesn't work well for things in deep space. Why? Cause their fictional universe has weird deep space. Thus, any unit traveling between worlds needs to 'hibernate' and cannot afford to fire weapons.

They are disabled because they have to curl up to protect vital components from solar wind and space radiation.

Some units could theoretically be designed to protect vital components while still deploying weapons. That is how I imagine the orbital weapons would work in the lore. And it is reasonable to think that because they must battle on many kinds of worlds, all units are radiation hardened to begin with.

Some people might think a explanation is not needed, but I feel that having units passed close by enemy units and just ignore them without any reason is a bit too odd.

This can't explain why all space units' engines still works in deep space, and why the commanders has their own energy storages but still couldn't fire in deep space, so this explanation seems doesn't works well.

I think creating a hyperspace visual effect is easier than giving each unit a curling up animation.
The hyperspace might doesn't need to increase the units' speed at all, it might be only used for avoiding enemy intercepting, and it can't works near a significant gravity well.

I like my game physics Newtonian with the magical elves hidden.

The space engines I've seen so far are all chemical and wouldn't rely on wireless energy transfer. For the commander..hmm..let the commander fire in deep space! He might get in one shot as you pass by at a zillion mph. But you gotta give it to him for the effort.

Why do I keep running across the word 'magic' being used as a pejorative?

We're talking science fiction here, with an emphasis on the fiction, justifying something with vague hand-waving and techno-babble isn't any more rational.

'Any sufficiently advanced technology is indistinguishable from magic.'
- Arthur C. Clarke

Space is big. Units in space move fast, and weapons have short ranges. There is no space combat because the engagement times would be fractions of a second, and the chance of two units randomly running into each other is miniscule.

I hope space is small. Look at the scales on their video, it's comically small.