推荐回答(5个)
刚好50亿年后,太阳膨胀将吞噬地球了~~~~呵呵~~
太阳源源不断地以电磁波的形式向宇宙空间放射能量。这种能量是由四个氢原子核在高温高压的条件下聚变成一个氦原子核而释放出来的。我们知道,一个氢原子核的原子量是1.00728,一个氦原子核的原子量是4.0015,4个氢原子核的质量应为4.0292。当4个氢原子核聚变成1个氦核时,就要亏损0.0276个单位的质量,其中,1克氢核聚变成氦核时要亏损0.0069克的质量。这就是说,太阳能的产生是以消耗质量为代价的,而且这些质量转化成太阳辐射就不再属于太阳了。太阳每秒钟要损失大约400万吨的质量,对于巨大的太阳质量来说简直太微不足道了。从太阳诞生到目前的50亿年中,太阳仅消耗了0.03%的质量,即使再过50亿年也仅消耗太阳质量的0.06%。可问题是,太阳质量再大,总还是有限的,到底太阳的寿命还能维持多长时间呢?对地球又有什么影响呢?
太阳的一生是从星云开始的,最后一直到红巨星、白矮星,成为太阳的死骸,这一过程大约要经过100亿年,也就是说再过50亿年将是太阳的死期,而我们人类生活的地球将在太阳变成膨胀的红巨星时被其吞掉。如果我们人类能生存到那个时代的话,就只能飞到其他星球上去生活了。
太阳内部发生的是核聚变。
太阳的原始高温是由它的内部压力而来。根据万有引力定律原理,物体的质量越大,其引力就越大。早年的太阳在滚雪球般发展时,随着质量的增加,引力也愈强,吸引周围的物质就越多,就更增加了质量,如此循环,太阳的质量越来越大。同时质量越大内部压力越大,从而温度不断的升高。产生热核聚变的条件是要有足够的压力(称之为临界压力)和合适的点火温度.随着原始太阳质量的不断增大,内部压力和温度的升高,达到满足产生热核反应的条件后,太阳就开始发光发热,成为一颗恒星.一般来讲,气体星球要成为恒星,必须要有一定的质量,这样它内部的压力和温度才能达到热核反应的条件,这个质量叫做临界质量.典型的例子就是我们太阳系中最大的气态行星—木星,同样也是由氢元素构成的气态星球,但由于它的质量小于临界质量,内部的压力和温度达不到产生热核聚变的条件,所以它只能是一颗气态行星。不过它是一颗潜在的太阳,有科学家推测,将来太阳毁灭后,没有太阳制约的木星将凭着它太阳系老大的地位吸引周围的行星自成一个小太阳系,同时也不断吸收周围的物质增加质量,达到临界质量后就会发光发热,成为另一颗太阳,不过那是50亿年以后的事了。
照现在的宇宙学理论,五十亿年后,太阳将演化成一颗红巨星,体积将膨胀数百倍,水星,金星,及地球将被它所吞没。
其实我觉得我们更应该考虑人类的命运
据说2015年是人类的一条门槛。如果不减少人类对地球的
破坏也许人类会真的进入不可逆转的困境
从中国的年初雪灾到地震
到浙江的水灾到安徽的水灾
可见一斑
不过我也想问
如果木星50亿年后没事
也没变成小太阳,是否会永远存在下去(没有星体碰撞)?
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