Chicagohenge is a stunning biannual event that happens during the spring and autumn equinoxes, when the sun aligns perfectly ...

and the second one forecasts the sun’s path across the sky. An Indian-Chinese research team has developed a novel dual-axis solar tracking system based on sensors and a controller module.

different parts of the planet are tilted closer or further from the Sun, because of the tilt in Earth’s axis. It is the angle of the Earth's tilt that causes the seasons: spring, summer ...