Example sentences of "[prep] the naked eye " in BNC.
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| 31 | It is easily visible with the naked eye , and is striking in binoculars ; with × 12 there is some resolution of its outer parts , and with × 20 it is seen to be starry . |
| 32 | It is a fine sight in binoculars , and the orange colour is noticeable even with the naked eye . |
| 33 | R Coronæ , in the bowl , is generally well within binocular range , and can just become visible with the naked eye , but when it drops to minimum it may fall to as low as magnitude 15 . |
| 34 | When photographed with adequate equipment it really does recall the outline of the North American continent ; it is dimly visible with the naked eye in the guise of a slightly brighter section of the Milky Way , and binoculars show it clearly as a large region of diffuse nebulosity . |
| 35 | Look in particular for the complicated Tarantula Nebula ( 30 Doradûs ) , which is the most brilliant part of the whole Cloud and can be identified even with the naked eye : it is the largest known diffuse nebula , and if it were as close to us as M42 in Orion it would cast strong shadows . |
| 36 | Keen-sighted people can distinguish them both with the naked eye . |
| 37 | Telescopes are needed to show the White Dwarf , but binoculars show the main pair clearly , and the components are separable with the naked eye . |
| 38 | Pollux is a K-type star , whose orange colour is noticeable with the naked eye and unmistakable in binoculars ; Castor is white , and is an interesting multiple system , though binoculars show it as single . |
| 39 | With × 7 , Zeta is in the same field as Delta and Lambda , and this makes comparisons easier even though Zeta is always visible with the naked eye under even reasonable conditions of seeing . |
| 40 | It is visible with the naked eye , and its position close to Eta and Mu makes it very easy to locate . |
| 41 | It is dimly discernible with the naked eye between Eta and Zeta , considerably closer to Eta . |
| 42 | As the magnitude is above 6 , it is detectable with the naked eye under very good conditions , but it is rather isolated , and takes time to identify . |
| 43 | It is worth remembering that in conditions of mist or moonlight , the whole south-polar region appears blank , and Beta Hydri is often the only star fairly close to the pole to remain visible with the naked eye . |
| 44 | It is the least luminous star visible with the naked eye . |
| 45 | Unfortunately it is a very barren group , and when I first went to the southern hemisphere I had difficulty in identifying the pole star , Sigma Octantis , which is only of magnitude 5.5 , and is none too easy to see with the naked eye unless the sky is really dark and clear . |
| 46 | This may sound complicated , but once Sigma has been identified it is easy to find again with binoculars , though much less so with the naked eye . |
| 47 | With the naked eye , the colour-difference is very evident , and binoculars bring it out splendidly . |
| 48 | With the naked eye M42 is visible as a misty patch , and binoculars show it excellently . |
| 49 | Its orange colour is quite evident with the naked eye , and striking in binoculars . |
| 50 | It is said to be slightly yellowish , though I have never seen any colour in it either with the naked eye or with binoculars . |
| 51 | L2 Puppis is a semi-regular variable with a range of from 3.4 to 6.2 , so that it is almost always visible with the naked eye and is well within binocular range even at minimum ; it is of type M , and clearly orange . |
| 52 | In the same region is another wide pair , Mu , separable with the naked eye and very easy with × 7 ; the magnitudes are 3.0 and 3.6 . |
| 53 | M6 and M7 are bright open clusters ; both are visible with the naked eye , not far from the Scorpion 's sting , and both are easily resolved with binoculars . |
| 54 | It is visible with the naked eye , and with × 12 I have suspected individual stars ; with × 20 there is undoubtedly some degree of resolution . |
| 55 | It has a period of 357 days , and at minimum is so faint that large telescopes are needed to show it , but at maximum it has been known to rise to 5.7 , and is then just visible with the naked eye and very easy in binoculars . |
| 56 | Some observers can see it with the naked eye under ideal conditions , though I certainly can not . |
| 57 | The Small Cloud is very obvious with the naked eye , and binoculars show it well , though admittedly it can not rival the splendour of the Large Cloud ; it has no well-defined shape , but is easy to resolve , at least in part . |
| 58 | Its companion , Alcor or 80 Ursæ Majoris , is of magnitude 4.0 , and is easily visible with the naked eye ; the angular distance between the two is 11.8 minutes of arc , so that in binoculars they make a noble pair . |
| 59 | It is easily visible with the naked eye , and binoculars give it a vaguely cruciform appearance . |
| 60 | The cluster is identifiable with the naked eye , and is clear with binoculars . |