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.

    是進入其他空間的大門，還是死亡的入口？以下是對黑洞的科學定義。

    黑洞是一塊區(qū)域的空間容器，在它的中心地帶，一些事物擠在一個密度非常大的點上，這個稱之為異物（如同異樣的能量一樣，是宇宙大爆炸的第一個產(chǎn)物）.重力的拉力是如此的強大，以至于任何事物，包括光也不能避免。

    黑洞要通過其周圍的物質的活動才能檢測到。目前為止，已發(fā)現(xiàn)的物質是由圓盤旋轉的氣體和塵埃構成，散發(fā)出熱量，將高速射出的物質或排放輻射推進黑洞里。

    黑洞的種類

    基本的黑洞是，超大質量黑洞和恒星黑洞。超大質量黑洞有著相當于太陽能量的上千萬倍。

    恒星黑洞是已發(fā)現(xiàn)的超級巨星的產(chǎn)物。