Recently on Twitter, researchers explained that some spiders, thanks to sensitive vision, can observe the cosmos, including the Moon and the Andromeda Nebula.
It all began with a tweet of Jamie Lomax from the University of Washington, in which she complained about the invasion of spiders on her desk. In response, she was jokingly advised to destroy the spiders with "bombs and fire," but instead she decided to try a different approach: use a laser pointer to "herd".
So she was advised to do Alex Parker from the Southwest Research Institute, which told that the spiders-racemen hunt for a luminous point from a laser pointer in the same way that cats do. Lomax, along with his colleague Emily Levesque, checked this and found that spiders were willingly chasing the green laser, but they were less interested in the red laser.
After this, Nate Morehouse of the University joined the discussion, who told that the eyes of the spider-jumper have two types of special light-sensitive cells, which are ideal for probing ultraviolet and green light. In addition, their eyes are similar in structure to the Galilean telescope. The eyes of a spider-horse, in fact, are tubes with an objective at the end. One lens collects and focuses the light, while the other directs it and enlarges the image, allowing the spiders to see many details.
The visual acuity allows them to see objects that are 0.07 degrees apart. The full moon covers about 0.5 degrees, so that the spider can easily notice it. Then Morehouse said that theoretically spiders can observe even the Andromeda Nebula, since their eyes are particularly sensitive to lower levels of light, which is ideal for viewing this galaxy.
A source: https://vk.com/innovationnews?w=wall-60902049_32284
It's just incredible! I can not believe this! I want to see like a spider!