Solstice

• Revolution : is the movement around something else. دورا 
• Orbit: is the movement around something in circle. مدار
• Ellipse: is an oval shape. قطع ناقصة 
• Axis:  is unreal line in the middle of the earth. محور

Summary

The solstice is happen two times a year in the summer and in the winter, The Earth Revolution is when the Earth is moving around the sun and the length is 365 days to turn around the sun, Ellipse is an oval shape the orbit moves around it, There is an Axis is unreal straight line Earth Axis is Tilted of the earth is 23.5 degrees.

As we know solstice happen  two time in the summer and in the winter. The Summer Solstice it's on June 21 or 22 which is a longest days of summer.The Winter Solstice is on December 21 or 22 which is the shortest days.

Solstice comes twice a year in the Winter and in the Summer. The Earth revolve around the sun in 365 days a year. the Tilt Axis is 23.5 degrees.