we have become accustomed to hung a gray sky object, it is hard to imagine there will be other things.Make a hypothesis, but here if we look up at the night sky, see not the moon, but a halo, what would it look like?
of course, it may be surprising, but in the evolution of our planet in a certain period of time, the earth once had a halo!
although this seems incredible, but in the billions of years ago, the earth once, indeed have a halo!Scientists believe that this extraordinary aura first appeared during the moon formed.According to the existing theory, in the beginning of the birth of the earth, a star called Theia (sensics) planets (and size) of Mars collided with earth, as a result of the two bodies slam, are a lot of debris ejected into space.
later, the debris is settled in orbit around the earth's rotation, forming a temporary halo around the earth.Subsequently, the halo together and gradually form we see today the moon hung in the night sky.
if the earth has rings?
, for example, suppose the earth also has similar to Saturn's rings.First of all, the earth aura will look completely different in Saturn's rings.You know, the rings of Saturn composition is not single.In fact, Saturn's rings are a collection of ice and dust particles.Because Saturn is far from the sun, so there is quite cold, aura to exist stably in the ice.But close to the sun, the earth, so the rings of Saturn can't completely copy to the earth, because the sun will melt the ice.
however, the earth can have a halo of the rock.Although the earth aura will not shine like Saturn's icy rings, but it can exist for a long time.So, now the earth has a halo, what?
the appearance of the earth aura
will first think of the problem is that an aura of what appears to be on earth.And, more importantly, the halo on earth can you see?
apparently, surrounding earth aura will be clearly visible.This halo above is likely to be parallel to the equator, so the appearance will depend on the position of the observer on earth.For example, for an observer standing near the equator, the earth's aura will look like a from across the horizon to the bright line of the horizon.
if you are away from the equator, aura will start in the sky.In a good position away from the equator, aura will appear in the very close to the horizon, make its spectacular.
impact on earth's natural light
the moon is a solid structure composed of rock material, this does not reflect sunlight well.However, the moon is so bright at night and the light is enough, thanks to its reflection to the strong sunlight on the earth.Auras will reflect sunlight in the same way, but the effect will be even more significant.
the moon and the aura of sunlight combination effect will make it more bright during the day, the sky will never be as dark as now.This kind of situation will also greatly affect astronomers observed work, because the stars are not as visible as now.
more cold winter
aura of blocking effect, will seriously affect the amount of sunlight that reaches the earth.Therefore, during the summer in the northern hemisphere, the aura will cast () at a time when the southern hemisphere winter in the southern hemisphere.And in the southern hemisphere during the summer, the aura will be cast in the northern hemisphere.Thus, resulting in the two hemispheres of the more cold in winter.
all in all, Saturn's rings may make our earth looks even more beautiful than now, but it is need to pay a big price.Therefore, also good didn't give the earth now add a halo universe.
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