.htaccess 301 redirect PLUS url rewrite

Premise:

• My photography website is www.domain.com and my blog is on www.domain.com/blog.


• Everything is on self hosted wordpress platform.


• On my index page I have my photo galleries.


• I now would like to use a third party service to host my galleries at www.galleries.com/me.

What I would like to achieve:

• when someone visits www.domain.com it gets redirected 301 to www.galleries.com/me but keeps my domain visible in url address


• when someone visits www.domain.com/blog everything stays as usual and nothing changes.

What I thought:

• usa redirect rule PLUS a rewrite rule on my .htaccess

Questions:

• Is it possible?


• How can i do it?


• How does it affects SEO?

I tried to make it as simple as I could :)
Thanks