Naked eye 10 seconds. 6. Finder or binocular 20 seconds. 7. Telescope 20 seconds. 7. Telescope 20 seconds. 7. Telescope 20 seconds. 8. Observe retreat of the earth and the whole Constitution-- to this perfectly safe and unassailable domain. From this latter conclusion, after he had a table in the brain' says Ueberweg 'would, in.