The Voyager 1 #spacecraft launched 37 years ago today, and is currently traveling at about 11 miles per second through interstellar space. Though Voyager’s primary mission ended in 1980 after observing both Jupiter and Saturn, it is expected to continue traveling until 2025, when it’s power supply runs out.
How do our eyes adjust to different types of light?
Our Iris’s are the circular structures in our eyes that control the diameter of our pupil, the hole in the center of the Iris and our pupil controls the amount of light that enters our eye.
When our eyes are exposed to light, our Iris expands causing the pupil to become smaller. This regulates the perfect amount of light we need to be able to see. When our eyes are exposed to low light, the Iris contracts, causing the pupil to become larger. This creates more space for light to enter our eye, having us see better in the dark.
In this gif, is the Iris contracting or expanding and why?