The Unconscious Mind

Long before oscar du halday spotted the branova with his naked eye, astronomers were using something almost as primitive to make sense of the sky. Astronomers were using these very delicate glass plates to capture images from telescopes. They would do all this work in the dark, because once you expose a plate into light, it starts to darken. But entists made huge discoveries with these glass plates, including one in nineteen twenty three by some one you may have heard of before, edwin hubble.