Space, the ...

But first they are made to get in to the air. If they exploded on the ground it would be disappointing, not to mention dangerous. Rocket rockets are minus the pretty exploding encapsulations. The fuel when ignited is allowed to escape out of a hole in the back.

Indeed they can. But really should not. I wonder if they can even get insurance on them? And whoever owns the payload get their money back and compensation for losses?

Incidentally. I have been trying to find out how much 'spare' fuel they would need to carry, and how much it would increase the payload, to slow them down before re-entry. Hitting the atmosphere at 15,000 MPH is problematical.
Spacex have so far only managed to land first stages. But even so, they must carry 'spare' fuel in order to do so. Places like Spacex, JPL, NASA, et al, don't appear to have e-mail addresses.

Interesting, thanks, but it's unlikely they will reply. Such places don't unless one has letters after one's name. Or Dr. in front of it.

Cool. I think China have also built a similar thing.

A shame it does not carry people. That's what's needed, not some robotic thing.

I doubt people would be spending any time in a robotic ship. But a manned one? What's 900 days? Just over two years? A Russian cosmonaut spent half that in space. But why would they have to spend that long in space in an actual spaceship? unless they were going somewhere. How far would they get in two years? but I suppose it would be one, then come back, if it had the fuel. Would take around 300 days to get to Mars, depending on where it was, and people have signed up for that trip, one way. A spaceplane would be ideal for that, but I don't think that's what's planned. Just yer bog-standard capsule.
SF has seen a lot of spaceplanes, and even aircraft manufacturers have come up with designs over the decades, often looking like the ones in SF. But yer still have that problem of re-entree. Maybe if they sent tankers up there to refuel the spaceplanes they could slow down enough the enter the atmosphere at a speed that did not cause so much heat. But it's said there's water on the Moon and they can make fuel from that. One day.