Gateways to different dimensions? A portal to certain death? Here is a definitive guide to the science of black holes.

    A black hole is a region of space containing, at it's centre, some matter squeezed into a point of infinite density, called a singularity （similar to the singularity of energy that was the first product of the Big Bang）, the gravitational pull is so great that nothing, not even light can escape.

    Black holes can therefore only be detected from the behaviour of materials around them; those discovered so far consist of a disk of gas and dust spinning around the hole, throwing off hot, high speed jets of material or emitting radiation as matter falls into the hole.

    Types of Black Hole

    There are to primary types of black hole, supermassive and stellar. Supermassive black holes which have the mass equivalent to billions of suns exis int he centre of most galaxys, including our own!

    Stellar black holes are the product of supergiant stars that have exploded and collapsed, these may be common in all galaxies.

    是进入其他空间的大门，还是死亡的入口？以下是对黑洞的科学定义。

    黑洞是一块区域的空间容器，在它的中心地带，一些事物挤在一个密度非常大的点上，这个称之为异物（如同异样的能量一样，是宇宙大爆炸的第一个产物）.重力的拉力是如此的强大，以至于任何事物，包括光也不能避免。

    黑洞要通过其周围的物质的活动才能检测到。目前为止，已发现的物质是由圆盘旋转的气体和尘埃构成，散发出热量，将高速射出的物质或排放辐射推进黑洞里。

    黑洞的种类

    基本的黑洞是，超大质量黑洞和恒星黑洞。超大质量黑洞有着相当于太阳能量的上千万倍。

    恒星黑洞是已发现的超级巨星的产物。