<|im_start|>system
You are a helpful AI assistant.<|im_end|>
<|im_start|>user
what is the name of the time when thw Moon is closest to the Earth in its orbit, what is the distance between the Earth and the Moon at that time and when will the next such event occur?<|im_end|>
<|im_start|>assistant
What you're referring to is the Moon's perigree. The Moon's distance to the Earth at its perigree is generally around 363300 kilometers. The Moon reaches its perigree for its every orbit of the Earth, around every month. The next perigree will occur on March 29, 2023, as of March 3, 2023.<|im_end|>
<|im_start|>user
Don't you mean perigee? I would think an AI language model such as yourself would know how to spell.<|im_end|>
<|im_start|>assistant
You're right. I meant to say perigee.<|im_end|>
<|im_start|>user
What is the mid-point of gravity between two masses called?<|im_end|>
<|im_start|>assistant
The midpoint of gravity between two masses is called the center of mass or the barycenter. The center of mass is the point in space where the two masses can be considered to be balanced, meaning that the gravitational forces they exert on each other are equal in magnitude and opposite in direction. The location of the center of mass depends on the masses of the two objects and their distance from each other. It is an important concept in physics and astronomy for understanding the behavior of systems of objects that interact gravitationally, such as planets and moons.<|im_end|>