11.   The distant unsighted object is a church steeple.

12.   A bat lives in a world of echoes from near objects, distant objects and objects at all intermediate distances.

13.   Analysis of the lines allows scientists to calculate the chemical composition of distant celestial objects.

14.   Another way to weigh the unseen matter is to look at how gravity bends the light from distant objects.

15.   --- Astronomers have expanded their horizons once again, reporting a new record for the most distant object ever observed.

16.   Distant objects cannot be seen sharply because light entering the eye is focused in front of the retina.

17.   Efforts are also under way to detect black holes at the heart of quasars, distant objects that radiate incredible amounts of light for their compact size.

18.   Encourage them to focus on distant objects.

19.   Even more distant objects will vanish sooner.

20.   For instance, nearsightedness, also called myopia, makes it difficult to see distant objects.