I think it's perfect because people are used to the word, "Hovercraft" so "Hubblecraft" sounds similar. It's easy to remember and it will catch on.

Further, the whole Hubble's expanding universe thing goes right along with the idea of Dark Energy, the anti-gravity force that's expanding the universe beyond where it would normally go after the Big Bang. The Hubble telescope was named after Hubble so I think the anti-gravity car should be called this.

Yeah man. I just ported to section Z of the northwest grid in my little Hubble. You really can't get a better hubblecraft than the new Porche. It saves lots of energy, etc.

Since anti-gravity would cause the vehicle to 'fall' into space, you could try 'spaceship', or perhaps 'flying saucer'. On a lighter note, I would like to compliment you on your footwear.

Thank you. The teenage girl guitar fans and other friends like them. Particularly the slippers with really floppy ears.