The Hooker Telescope on Mt. ... Credit Copyright: Mount Wilson Observatory Explanation: In the 1920s, pictures from the Hooker Telescope on Mt. ... Astronomer Edwin Hubble , using photographs he took with this telescope, demonstrated that the objects his contemporaries called "spiral nebulae" were actually huge systems of stars - spiral galaxies, similar to our own Milky Way galaxy but incredibly distant. ... The Mount Wilson Observatory offers a "virtual walking tour" of this historic telescope. ...