The news has spread all over the country (that) the spaceship succeed in returning to the earth.

定语从句~
不过可以省去的~~
希望对你有帮助~呵呵~

that引导同位语从句。
that后的内容是对the news的补充说明，但‘news'在从句中不充当任何成分，因此不是定语从句，而是同位语从句。
原句的语序可稍作变化，帮助理解：The news (that the spaceship succeed in returning to the earth) has spread all over the country.
括号外的为主句。

下面举个定语从句的例子，可以做一下比较：
The news (that CCTV reported) has spread all over the country.
这里括号中从句成分明显不完整，本应该是report the news，
所以该从句为news的定语从句.

同位语从句的引导词只有"that".
而定语从句的引导词有：that which where who 等。

that 引导同位语从句，“ the spaceship succeed in returning to the earth”就是news的具体内容也是news的同位语。同位语从句中that不可以省略

关于同位语从句：http://baike.baidu.com/view/179.htm

这是个同位语从句 that the spaceship succeed in returning to the earth是news的同位语。同位语从句都用that来连接，不可省略
原来的语序应该是The news that the spaceship succeed in returning to the earth has spread all over the country 。但是这样看起来句子头大身子小，为了使句子看上去更协调，也为了强调同位语，所