That secondary mirror, in turn, bounced the light (and thus the image seen) into a convex eyepiece lens built into the side of the tube. This was the first working reflecting telescope.

The eight ripples seen by the Hubble Space Telescope in this cosmic scene marks the most ever seen in any galaxy, and data ...

The telescope could provide clues about how the first stars formed and how chemical signatures from exoplanets could point to the building blocks of life. This image, released Monday, was the ...