tangible result of an idea

What is the name of your state? sc

I need some advice on copyright infringement. I am a lay person
researching copyright information and trademark information.
I have read that an intangible idea may not be copyrighted.

An example: Someone puts up a web site and claims ownership to of space dust and gets a trademark and copyright for this web site that sells space dust

The intangible idea..selling spacedust. The tangible result...the trademark,copyright of web site and deeds
of ownership.

I have a similar intangile idea...to sell space dust for example.
I put up a web site also. The web address is spacerocks.com
The original had the name of spacedust.com
I copyright my site spacerocks.com also.
I trademark my website also and use the name in my trademarked logo.
I do not copy and html or words from the site that sells space dust.
I deside i want to sell space dust also. What would keep me from doing this? I call it space powder. Would this be a copyright
infringement? I also copyright my deeds which are completely
different from the original sites deeds of ownership of space dust.

These are similar ideas. I have read you can't copyright an idea but you can copy right a tangible result. Am I ok if I do this?
Please help if you can. I need an answer from someone who is
more up on these legal questions.
If not what would be legal?

Didn't you already get an answer to this question?

Yes but I needed some clarification. But I see I got none. Your answer is no satisfactory at all to my latest question. Why? I guess you feel like to have all ready answred it. But they way you answered my latest question is a little arrogant. Remember I
did not ask YOU for a specific answer I am asking anyone with the time and knowledge.