From a basic perspective: Yes, new space is being created. And, yes, the physical distance between things are changing. The [Hubble constant](https://www.wol

From a basic perspective: Yes, new space is being created. And, yes, the physical distance between things are changing. The [Hubble constant](https://www.wolframalpha.com/input/?i=hubble+constant https://www.wolframalpha.com/input/?i=hubble+constant ) is roughly (2.2 * 10^-18)/s -- often written as, e.g., 68 km/s/Mpc (same thing). Which basically asserts that, every second, each unit of space is increasing by 2.2*10^-18. For example, if we suppose that there's a ball 1 meter away from you, then in a second, it'ld be ~1.0000000000000000022 meters away from you. Not that it moved away from you, but rather that ~2.2*10^-18 meters of space was created between you and it. At least, in basic theory. There're a lot of reasons to not take it too literally. For example, at local-scales, forces may resist expansion, instead pulling things back together. For another, the idea that the value is constant seems dubious. But, it's really simplified/approximate/speculative/etc.. Note that this does imply that things can, in a sense, move faster than the speed of light without violating Einstein's Relativity. Because Einstein's Relativity asserts that things can't move faster than light locally; however, the expansion of space isn't considered to be a factor in that. Which is relevant to the main-article above: when something's so far that space is being created between you and it faster than the speed-of-light, it's theoretically outside of the universe that's relevant to you, and thus outside of one (disfavored) notion of "the observable universe". For example, say that two aliens are separated by such a distance that the expansion-of-space between them is greater than the speed-of-light. Then, even if both aliens blasted off at nearly the speed-of-light toward each other, they'd still approach each other more slowly than the distance is expanding, such that they wouldn't reach each other. (At least, under a lot of assumptions.) That distance-of-separation is currently [estimated at about 14-billion light-years](https://www.wolframalpha.com/input/?i=%28speed+of+light%29+%2F+%28hubble+constant%29 https://www.wolframalpha.com/input/?i=%28speed+of+light%29+%... ), called the [Hubble length](https://en.wikipedia.org/wiki/Hubble%27s_law#Hubble_length https://en.wikipedia.org/wiki/Hubble%27s_law#Hubble_length ).