only, as, in consequence of the different areas of the respective
surfaces, the _Earthlight_ is thirteen times more intense than the
_Moonlight_, the dark portion of the Earth's disc appeared considerably
more adumbrated than the _Old Moon_.

But the other phenomenon had burst on them so suddenly that they
uttered a cry loud enough to wake up Barbican from his problem. They had
discovered a true starry ring! Around the Earth's outline, a ring, of
internally well defined thickness, but somewhat hazy on the outside,
could easily be traced by its surpassing brilliancy. Neither the
_Pleiades_, the _Northern Crown_, the _Magellanic Clouds_ nor the great
nebulas of _Orion_, or of _Argo_, no sparkling cluster, no corona, no
group of glittering star-dust that the travellers had ever gazed at,
presented such attractions as the diamond ring they now saw encompassing
the Earth, just as the brass meridian encompasses a terrestrial globe.
The resplendency of its light enchanted them, its pure softness
delighted them, its perfect regularity astonished them. What was it?
they asked Barbican. In a few words he explained it. The beautiful
luminous ring was simply an optical illusion, produced by the refraction
of the terrestrial atmosphere. All the stars in the neighborhood of the
Earth, and many actually behind it, had their rays refracted, diffused,
radiated, and finally converged to a focus by the atmosphere, as if by a
double convex lens of gigantic power.

Whilst the travellers were profoundly absorbed in the contemplation of
this wondrous sight, a sparkling shower of shooting stars suddenly
flashed over the Earth's dark surface, making it for a moment as bright
as the external ring. Hundreds of bolides, catching fire from contact
with the atmosphere, streaked the darkness with their luminous trails,
overspreading it occasionally with sheets of electric flame. The Earth