I'm at work and will be leaving pretty soon, so it's not convenient for me to start reviewing. Plus, not sure I'd be the best as far as grammar check is involved :)
@MonicaCellio a sizeable portion of our "scientific" posts have to do with space, planets, etc... so it might be interesting to separate that tag from the rest
and a tag 'worlds' might be interesting, for example, John's posts would not fit so well in the other categories
@MonicaCellio Yeah aside from proofreading I think it is good...I would have proofread it last night but by the time I finished I was slightly cross eyed.