This is a list of past revisions of The telescope. Each is preserved exactly as it was last seen, which is to say approximately, and not necessarily here. Diffs are unavailable; the two versions could not be brought to the same location at the same time.
cur | prev2026NotTheMudGeometer(talk | contribs). . (4,750 bytes)(+50). . (→ ABOVE THE AIR, AND THE MIRROR: THEY SENT ONE UP PAST THE AIR AND IT COME BACK BLURRY. I REST MY CASE. I HAVE BEEN RESTING IT SINCE 1862)(current)
cur | prev30 August 2026a surplus mirror(talk | contribs). . (4,700 bytes)(+230). . (→ the present day: i was ground to be pointed down. they have sent me up instead. the aperture is the same as the one they launched in 1990 and the field is a hundred times larger, which says what the aperture was ever worth)
cur | prev2016T. Vogel(talk | contribs). . (4,470 bytes)(+190). . (restored, and let the objection stand in the article where it can be answered. the instrument's own limit was published in 1879 and the air's limit is worse, and both are written down)
cur | prev2016MudGeometer_1844(talk | contribs). . (4,280 bytes)(−130). . (SAME AS 1862. A PICTURE FROM A MACHINE IS A PICTURE OF A MACHINE)
cur | prev2005a sodium atom(talk | contribs). . (4,410 bytes)(+200). . (→ the present day: ninety kilometres up, put here by a meteor, and once a night something at 589 nanometres arrives and makes me glow so that a mirror in Chile can be told what shape the air is)
cur | prev1999adaptive optics(talk | contribs). . (4,210 bytes)(+240). . (→ the limit stops being the telescope: measuring the air a thousand times a second and bending a small mirror against it. the ground can reach its own limit again)
cur | prevDecember 1993COSTAR(talk | contribs). . (3,970 bytes)(+260). . (→ above the air, and the mirror: fitted. the mirror is still the wrong shape and always will be. i am spectacles)
cur | prev1990two simpler correctors(talk | contribs). . (3,710 bytes)(+60) m . . (we both said the mirror was wrong. we were set aside as the less accurate instruments, which we are)
cur | prev25 April 1990a null corrector(talk | contribs). . (3,650 bytes)(+90). . (one of my lenses is one and three tenths of a millimetre out of place. i did not mention it. they polished the mirror until it agreed with me)
cur | prev1966the Fried parameter(talk | contribs). . (3,560 bytes)(+200). . (→ the limit stops being the telescope: the air is in cells a few inches across and the answer is my size, not the mirror's. everything built since Rosse has been resolving to me)
cur | prev1897the Yerkes objective(talk | contribs). . (3,360 bytes)(+180). . (→ bigger: forty inches, and the last of us. i can only be held at my rim and i sag. they turn me round from time to time so that i droop evenly)
cur | prev1895A. T. Jung(talk | contribs). . (3,180 bytes)(+220). . (→ the limit stops being the telescope: the glass has been blamed for a century. between the object and the object-glass are several miles of unsteady air, and it is the air that is losing the detail)
cur | prev1879Lord Rayleigh(talk | contribs). . (2,960 bytes)(+240). . (→ the limit stops being the telescope: two points are just separable when the bright centre of one falls on the first dark ring of the other. this fixes what any aperture can do, and it is generous)
cur | prev1863the Society(talk | contribs). . (2,720 bytes)(+200). . (restored. the instrument does not invent the object. one may take the tube off and see less, which is the experiment proposed above and has been performed by everybody, continuously, for ever)
cur | prev1862the Mud Geometer(talk | contribs). . (2,520 bytes)(−110). . (IF IT IS REALY THERE THEN I SHOULD SEE IT WITH MY OWN EYE AND I DONT. TAKE THE TUBE OFF IT AND TRY AGEN)
cur | prev1861S. Rowbotham(talk | contribs). . (2,630 bytes)(−150). . (the telescope shows what it is built to show. a curved glass will return a curved world to anyone who wants one)
cur | prev1846H. Unlonn(talk | contribs). . (2,780 bytes)(+140). . (the glass is not the difficulty. between the object and the object-glass there is a quantity of air, and the air has views)
cur | prevApril 1845W. Parsons(talk | contribs). . (2,640 bytes)(+320). . (→ bigger: seventy-two inches at Birr. M51 is not a smudge, it is a spiral, and i have drawn it. the instrument cannot be pointed more than an hour from the meridian and it rains)
cur | prev1836a sysop(talk | contribs). . (2,320 bytes)(−220). . (removed the bat-men. the paper has not retracted and the circulation is up)
cur | prev1835the New York Sun(talk | contribs). . (2,540 bytes)(+220). . (reports that the great telescope at the Cape has found bat-men on the moon. attributing it to Herschel's son, who is at the Cape and has not been asked)
cur | prev1789W. Herschel(talk | contribs). . (2,320 bytes)(+300). . (→ bigger: forty feet, and forty-seven inches of speculum. it wants a crew to move and the mirror tarnishes. i do my actual observing with the twenty-foot)
cur | prev1758J. Dollond(talk | contribs). . (2,020 bytes)(+210). . (→ the colour problem: crown against flint, and the colour cancels while the focus does not. patent granted this year. the proof above that it cannot be done is now removed)
cur | prev1733C. M. Hall(talk | contribs). . (1,810 bytes)(+0) m . . (no change. i have made a lens with the colour taken out. i ordered the two halves from different opticians so that neither should see the whole. i am telling nobody and am not editing this page)
cur | prev1672a hole in the primary(talk | contribs). . (1,810 bytes)(+150). . (→ every design is an escape: cut through the middle of the big mirror and send the light back down through me. the eyepiece comes down to the bottom of the tube, where a man may sit, instead of forty feet up in the weather)
cur | prev1668I. Newton(talk | contribs). . (1,660 bytes)(+340). . (→ the colour problem: the colours cannot be got out of a lens. i have proved it. use a mirror, as here)
cur | prev1611a banquet guest(talk | contribs). . (1,320 bytes)(+60) m . . (the Latin word is clumsy. from far and to look: telescope. the room seemed to like it)
cur | prev1610G. Galilei(talk | contribs). . (1,260 bytes)(+480). . (→ not his, and not his name: thirty times, and four things going round Jupiter. i did not invent the instrument and have not said that i did)
cur | prev26 July 1609T. Harriot(talk | contribs). . (780 bytes)(+260). . (→ not his, and not his name: drew the moon tonight at six times. the edge is rough. i do not intend to print this)
cur | prevOctober 1608the States General(talk | contribs). . (520 bytes)(+120). . (refused. two other men were here this month with the same thing. it cannot be given to one of you because it can be made by any of you. paying him anyway and asking for a pair)
cur | prev2 October 1608H. Lippershey(talk | contribs). . (400 bytes)(+400). . (created the page. a tube, two glasses, three times nearer. asking the States General for the sole right to make them)
Older revisions exist but have not been located. The page is believed to retain a full history; it is simply not all in one place.