The Hubble Space Telescope consists of two mirrors: the primary and secondary mirrors. Light enters the telescope through the front and bounces off the primary mirror at an angle and hits the secondary mirror, where light bounces back in wards. This light, now focused, goes through a hole in the primary mirror and is received by various instruments, where the picture is actually taken. Then scientists can take these images remotely and look at them, discovering many things.
Telescopes don't work by magnifying an image, but by capturing more light than a human eye, the larger the mirror in a telescope, the bigger the image it produces. The Hubble's mirror is actually slightly smaller compared to some on the ground, but the Hubble still produces better images because it is not looking through the atmosphere, which provides a lot of disruptions and distorts the images taken. The Hubble, being in space, has no atmosphere to look through, so the pictures are much clearer.
Telescopes don't work by magnifying an image, but by capturing more light than a human eye, the larger the mirror in a telescope, the bigger the image it produces. The Hubble's mirror is actually slightly smaller compared to some on the ground, but the Hubble still produces better images because it is not looking through the atmosphere, which provides a lot of disruptions and distorts the images taken. The Hubble, being in space, has no atmosphere to look through, so the pictures are much clearer.