"Two Uranus years (one Uranus year is 84.02 Earth years), running from 1900 to 2068 and starting just before southern summer solstice, when Uranus’s south pole points almost directly towards the Sun," ...

Textbooks on wooden school desk with chalkboard. Textbooks on wooden school desk with chalkboard. Back to school. Textbooks stacked on wooden school desk in front of green chalkboard. Classroom ...