What is celestia tia?

Could you please elaborate on the concept of "celestia tia"? I'm quite curious about it, but I'm not entirely familiar with the term. Could you provide some context or background information? Is it related to a specific field, such as astronomy, mythology, or another area? I'm also interested in knowing if there are any particular stories or legends associated with it. Could you share any interesting facts or details that might help me understand "celestia tia" better? Thank you for your assistance in clarifying this matter for me.