When is the closest time between the earth and the sun

When is the closest time between the earth and the sun

The earth's orbit around the sun is a nearly round ellipse, and the sun is located at a focal point of the ellipse. In this way, the distance between the sun and the earth is constantly changing in a year or even in a day. At the beginning of January every year, the earth is located at the perihelion of the orbit around the sun, and the distance between the sun and the earth reaches the minimum value, about 147.1 million kilometers

In a day, when is the sun closest to the earth and why?
When is the farthest?

The answers above seem to be correct, but they all ignore the fact that the earth has a volume shape. The earth is not a "particle". If we consider that it is a sphere, theoretically speaking, it is the closest at noon and the farthest at midnight

Which season is the sun near the earth, summer or winter?

Northern Hemisphere: it is closest to the sun in early January and farthest from the sun in early July
The southern hemisphere is opposite
It has been said that December 22 and June 22 are not accurate. The winter solstice and summer solstice are the shortest and longest days in the northern hemisphere
The southern hemisphere is opposite