its.earth is a great name for any project to do with earth! Not to mention your imagination of sub domains. I will sell for $25,000.00
At this time I have created a website with earth information on it at Its.Earth. I only sell domain names. the website is not for sale. Here is a Earth Feed.
Until It's Domains is fully updated you can find more domain name News and DNS information, buy and view the full list of domain names at Matrix Domains