I’ll answer your last question first, “Are most people like that, or only a few?”
“Just enough” people are like that so that in the short time that homo sapiens has been on Earth (short in geological time, that is), we’ve managed to move from living in trees and on the ground, with no tools or language, to… producing and living with everything that we have around us now. Being able to make tools, transmit that knowledge to others, and then improve the tools, to improve the things built with the tools, and so on, is not accidental. It has taken a lot of curiosity from a great number of people to want to learn those things, and more curiosity over long periods of time for people to learn ways to improve what they have. So I’d say “just enough to have gotten where we are today”.
On the other hand, that response has to be tempered with “not enough that we’ve stopped killing each other to take things that they have, instead of learning how to produce it ourselves”, and “not enough to learn to overcome jealousy and anger”, and “not enough to find ways to keep some people from continuing to live on the ground (when they would really like to do better) and not enough to go back to living simply sometimes, just because it’s more healthy for us”.
So, some, but not enough.
It’s great to be curious, and it’s a good start to your academic career or simply “your career as a human being”, but now you have to see if you can channel that curiosity into something more tangible: clear writing, for example, to express your thoughts, or art in any of the infinite ways that can be done, or narrowing the focus of your curiosity to any subset of “all of the universe” and learning more about that niche – and then demonstrating what you have learned in some way.
“Getting lost in staring at the stars” is fine, up to a point, but if that’s all you do, then what will it gain you? I’m not making a judgement against those who actually do nothing more than that, but if that’s the case, then who is going to feed and house you? Most people expect a return exchange; at some point, your Mom is going to be tired of feeding you and cleaning up after you when (at least in her mind) you should be earning your own living. So keep in mind that you have to live in the real world.
As Buddhists say, “Before enlightenment fetch wood, carry water. After enlightenment fetch wood, carry water.”