The Earth describes an ellipse around the Sun. The Earth-Sun distance is therefore not constant and has a minimum, perihelion, and a maximum, aphelion. The Earth will pass to aphelion on Tuesday 6 at 12:27 am and its distance from the Sun will then amount to 152,100,527 km. This maximum is reached while summer reigns in our hemisphere. Strange, isn’t it? In fact, the seasons have nothing to do with the Earth-Sun distance but are due to the tilt of the axis of rotation of the Earth. The northern hemisphere is currently tilted towards the Sun, the height of the latter on the horizon and the duration of its illumination are maximum: it is hot.
It is at the beginning of January that the Earth is closest to the Sun (147.1 million kilometers) and at the beginning of July that it is furthest (152.1). Credits: Johan Kieken / Sciences et Avenir
July 2021 sky map
Discover below the sky map visible in mid-July around 10 p.m. (click above to enlarge the image).
Image credits: Johan Kieken / Sciences et Avenir
How to use this card?
Rotate your smartphone or tablet so that the name of the direction you are looking is written right side up. The constellations and stars that you will find in the sky in front of you are all those whose names are readable without tilting your head too much. The position of the planets visible to the naked eye is indicated for the 15th of the month. Our map drawn for a latitude of 47 ° north shows the sky visible in metropolitan France, and more widely in Europe and in the world, within a band extending from 40 to 54 ° north latitude. If you are north of the 47th parallel, the Pole Star will be higher in your sky and lower otherwise.