I vaguely remember reading something somewhere that stated Imperials once travelled to the moons and had plans to colonise parts of one or both.
I am very hazy on the details and it is quite possible that maybe I just dreamt the whole thing.
Anyway, I cant find any information on the imperial library, so I thought Id ask here.

Have there been instances of what we would call space travel in Tamriel?
Who travelled and with what method and destination?

One of the many herecies of the Dwemer, Im told, is their travel into outer realms. Is this Oblivion, pocket dimensions in Oblivion like Battlespire, the moons and planets around Nirn or something else entirely?

What about vehk ships?

Im asking because many, many people seem to be under the impression that Tamriel is somehow medieval in nature.
I think they are magical, not technological, and quite advanced in their magic.
For instance, the abovementioned Battlespire wich is an artificial pocket dimension. Id call that advanced.
Im looking for more examples.

http://www.uesp.net/wiki/Daggerfall:Journey_to_Aetherius

http://www.uesp.net/wiki/Lore:Aetherius

http://www.uesp.net/wiki/Bloodmoon:The_Patchwork_Airship

Thanks
But no actual travel to the moon(s)?

Nerevar traveled to the moon(s) in the 36 Lessons, MK proposed them as a possible location to a new Cyrus story, and then there is the ever popular Secunda Moon-Colony RTS. So I'm not sure its been done, but it can be done (though obviously not the same way as in the real world). Then there were the Sunbirds and Imperial Mananauts, who traveled to Aetherius.

http://www.imperial-library.info/content/cosmology is probably the best summary of various space-y stuff. http://www.imperial-library.info/content/forum-archives-michael-kirkbride also has a couple fragments on Vehkships and the Sunbirds which should be interesting.

I thought I dreamed this as well; glad to have the concrete information at last.

Thanks
Its very interesting though I havent really figured out how to read MK yet. Its like reading something in an unknown jargon, like say, the manual of CERN. Im hoping that if I read em long enough eventually something will go click. I do like how he tinkers with language, but its hard to understand.

Im still hoping someday someone will publish an annotated sermons lol.

I cant help but wonder what the point of colonizing the moons would be if all they are is Lorkhan's rotting corpse floating around out there? Can his body be terraformed or something? or if they were to land on it would it be just a whole other plane like one of the Daedric spheres, given their seen as planets (right? or did I make that up?).

According to Cyrus, Morrowind, Yokuda, and Masser have similar topography.

Two advantages I can think of:

A. Throw feces at those altmer at night.

B. Throw feces at daedra in revenge for battlespire.

Yes there is travel to the Outer Realm. Hence how we know so much about the realms of Oblivion.

The Aedra are seen as planets.
The Daedra are not.

Isn't that backwards?
Didn't the Aedra combine their planes to form Nirn?
and the Deadra retain their power and use them to create their own plane(t)s?

The Aedra can be seen as planets in the sky orbiting Nirn.
The Daedra have their planes of Oblivion, but these are not visible as planets from Nirn.

It's as Merari said.
The Daedric realms are not part of Mundus, and thus not visible from Nirn.
The Aedra can be seen from Nirn precisely because they are part of Mundus.

The night sky is Oblivion.