पृथ्वी तथा सूर्य के मध्य सर्वाधिक दूरी की स्थिति को क्या कहा जाता है?

What is the exact period of Earth's revolution around the Sun?

What is the point in the Moon's orbit when it is closest to the Earth called?

The phenomenon by which the same hemisphere of the Moon always remains turned towards the Earth is known as: