I personally loved this piece. It gave me the atmospheric feeling (pun intended) that I was floating through space, admiring the stars, nebulas, and galaxies alike. That being said, if I may, I would like to make a countercriticism to whether music about space should be emotional rather than nothing.
It could be said that space is seemingly nothing, but I think that's part of the magic of it. Space is unknown. It's endless potential. We realize not only how small we are in comparison, but how much capacity for interesting stuff there is because of it.
We inhabit a small space and there are so many wonderous things in this area alone. If so many amazing things exist in our small space, imagine how many amazing things are still out there! There's planets, nebulas, stars, asteroids, the possibility of other life! The countless, endless possibilities are mindboggling! There's an endless ocean that could hold any amount of unforeseen treasures. This is the very spirit of adventure.
It is not the lack of stuff that can create a fascination with space, but the potential for it. A child is fascinating for the same reason. A child has seemingly endless potential, they can be anything! This same wonder is why so many pieces about space are grandiose and emotional. They encapsulate our smallness in comparison the the depths of space (hence the gigantic orchestra part) as well as the curiosity for what could be out there (hence the emotional part).
Now that being said, I don't think there's anything particularly wrong with viewing space as empty, dead, or meaningless. That's the thing about potential, it's in the eye of the beholder. One person can view space as teaming with adventure while another void of anything the same way someone could view a child as being full of life and with the potential to become anything they want while someone else would see the child as being unprepared and naïve to everything life is about to throw at it. Neither view is wrong, they are simply two angles of looking at the same canvas.
All that being said, I'm sure there are pieces out there that focus more on the 'dead' emptiness of space. And if not, then write one! Music has the endless potential to be anything in the hands of a composer, so if you wish something to come into being, then you have the power to do so!