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A second large order of equivocating appearances will arise,–not as to magnitude, but as to motion. If it could be a safe assumption, that the system to which our planet is attached were absolutely fixed and motionless, except as regards its own internal relations of movement, then every change outside of us, every motion that the registers of astronomy had established, would be objective and not subjective. It would be safe to pronounce at once that it was a motion in the object contemplated, not in the subject contemplating. Or, reversely, if it were safe to assume as a universal law, that no motion was possible in the starry heavens, then every change of relations in space, between ourselves and them, would indicate and would measure a progress, or regress, on the part of our solar system, in certain known directions. But now, because it is not safe to rest in either assumption, the range of possibilities for which science has to provide, is enlarged; the immediate difficulties are multiplied; but with the result (as in the former case) of reversionally expanding the powers, and consequently the facilities, lodged both in the science and in the arts ministerial to the science. Thus, in the constellation Cygnus, there is a star gradually changing its relation to our system, whose distance from ourselves (as Dr. Nichol tells us) is ascertained to be about six hundred and seventy thousand times our own distance from the sun: that is, neglecting minute accuracy, about six hundred and seventy thousand stages of one hundred million miles each. This point being known, it falls within the arts of astronomy to translate this apparent angular motion into miles; and presuming this change of relation to be not in the star, but really in ourselves, we may deduce the velocity of our course, we may enter into our log daily the rate at which our whole solar system is running. Bessel, it seems, the eminent astronomer who died lately, computed this velocity to be such (viz., three times that of our own earth in its proper orbit) as would carry us to the star in forty-one thousand years. But, in the mean time, the astronomer is to hold in reserve some small share of his attention, some trifle of a side-glance, now and then, to the possibility of an error, after all, in the main assumption: he must watch the indications, if any such should arise, that not ourselves, but the star in Cygnus, is the real party concerned, in drifting at this shocking rate, with no prospect of coming to an anchorage. [Footnote: It is worth adding at this point, whilst the reader remembers without effort the numbers, viz., forty-one thousand years, for the time, (the space being our own distance from the sun repeated six hundred and seventy thousand times,) what would be the time required for reaching, in the body, that distance to which Lord Rosse’s six feet mirror has so recently extended our vision. The time would be, as Dr. Nichol computes, about two hundred and fifty millions of years, supposing that our rate of travelling was about three times that of our earth in its orbit. Now, as the velocity is assumed to be the same in both cases, the ratio between the distance (already so tremendous) of Bessel’s 61 Cygni, and that of Lord Rosse’s farthest frontier, is as forty- one thousand to two hundred and fifty millions. This is a simple rule- of-three problem for a child. And the answer to it will, perhaps, convey the simplest expression of the superhuman power lodged in the new telescope:–as is the ratio of forty-one thousand to two hundred and fifty million, so is the ratio of our own distance from the sun multiplied by six hundred and seventy thousand, to the outermost limit of Lord Rosse’s sidereal vision.]

Another class, and a frequent one, of equivocal phenomena, phenomena that are reconcilable indifferently with either of two assumptions, though less plausibly reconciled with the one than with the other, concerns the position of stars that seem connected with each other by systematic relations, and which yet may lie in very different depths of space, being brought into seeming connection only by the human eye. There have been, and there are, cases where two stars dissemble an interconnection which they really have, and other cases where they simulate an interconnection which they have not. All these cases of simulation and dissimulation torment the astronomer by multiplying his perplexities, and deepening the difficulty of escaping them. He cannot get at the truth: in many cases, magnitude and distance are in collusion with each other to deceive him: motion subjective is in collusion with motion objective; duplex systems are in collusion with fraudulent stars, having no real partnership whatever, but mimicking such a partnership by means of the limitations or errors affecting the human eye, where it can apply no other sense to aid or to correct itself. So that the business of astronomy, in these days, is no sinecure, as the reader perceives. And by another evidence, it is continually becoming less of a sinecure. Formerly, one or two men,– Tycho, suppose, or, in a later age, Cassini and Horrox, and Bradley, had observatories: one man, suppose, observed the stars for all Christendom; and the rest of Europe observed him. But now, up and down Europe, from the deep blue of Italian skies to the cold frosty atmospheres of St. Petersburg and Glasgow, the stars are conscious of being watched everywhere; and if all astronomers do not publish their observations, all use them in their speculations. New and brilliantly appointed observatories are rising in every latitude, or risen; and none, by the way, of these new-born observatories, is more interesting from the circumstances of its position, or more picturesque to a higher organ than the eye–viz., to the human heart–than the New Observatory raised by the university of Glasgow.[Footnote: It has been reported, ever since the autumn of 1845, and the report is now, (August, 1846,) gathering strength, that some railway potentate, having taken a fancy for the ancient college of Glasgow, as a bauble to hang about his wife’s neck, (no accounting for tastes,) has offered, (or will offer,) such a price, that the good old academic lady in this her moss-grown antiquity, seriously thinks of taking him at his word, packing up her traps, and being off. When a spirit of galavanting comes across an aged lady, it is always difficult to know where it will stop: so, in fact, you know, she may choose to steam for Texas. But the present impression is, that she will settle down by the side of what you may call her married or settled daughter–the Observatory; which one would be glad to have confirmed, as indicating that no purpose of pleasure-seeking had been working in elderly minds, but the instinct of religious rest and aspiration. The Observatory would thus remind one of those early Christian anchorites, and self-exiled visionaries, that being led by almost a necessity of nature to take up their residence in deserts, sometimes drew after themselves the whole of their own neighborhood.]