What if a bronze or iron age society (in a Kerbal-scale univ

I've toyed around with low tech space travel in the past, now we go further!

What if a bronze or iron age society (in a Kerbal-scale universe) *NEEDS* to go to another planet ASAP. Perhaps it's a planetary catastrophy caused by conflict with the gods, perhaps their astronomers are advanced enough to recognize an asteroid collision when they see one, maybe they just think Duna is the bee's knees. Using only technology and Dungeons and Dragons spells available to them, can they do it? They do, of course, have endless budget. The closest thing they have to a steam engine is a Hero Engine or a low pressure steam wheel.

Materials:
-Cast Iron
-Bronze
-Steel
-Wrought Iron/Black Iron
-Wheel-thrown pottery
-Wood
-Stone
-Concrete
-Water

List of useful spells:

Animate Objects: l5, 120ft, concentration up to 1 min. Command the object to do a thing.
Arcane Lock: Can be used to create airtight air locks. l2, touch.
Astral Projection: l9, expensive, can be used to "hibernate" during the voyage, not consuming any air or food.
Burning Hands: l1, good for whoever lives in the engine room.
Cone of Cold: l5, Getting rid of waste heat is easy if you can just break thermodynamics whenever you feel like it.
Conjure Animals: l3, Good for feasts of meat.
Continual Flame: l2, provides roughly 60 watts of energy forever.
Create Food and Water: l3, 45 pounds of food, 30 gallons of water. Enough to sustain a 15 humanoid crew for 24 hours.
Darkvision: l2. It's pretty hard to get consistent lighting in space. It's handy to be able to see in the dark.
Daylight: l3: ditto. I assume this spell only generates light, and no significant heat. But it has to be maintained every hour or it fails.
Drawmij's Instant Summons. l6.  It's an interplanetary teleporter for small objects! Or possibly more like a 3D printer, and you need to carry lots of sapphires with you.