What do black holes do?
When an object gets close to a black hole, it's pulled faster and faster into the middle of it. This happens because black holes have very strong gravity.
Gravity is a pulling force. All objects have it and the bigger the object, the stronger its gravity. On Earth, gravity is what makes an orange fall when you throw it. It makes rivers flow downhill and skateboarders zoom down a ramp. Gravity holds each person in place on the ground. Without gravity, we'd float off into space.
黑洞会做什么？
当一个物体靠近黑洞时，就会被越来越快地拉向黑洞的中心。这是因为黑洞有很强的引力。
重力是一种拉力。所有物体都有引力，而且物体越大，引力就越强。在地球上，当你把橙子扔出去的时候，重力会让它掉下来。重力让河流流向下坡，让滑板者从坡道上急速滑下。重力把每个人都固定在地面上。没有重力，我们会飘向太空。
When you're on a slope, the pulling force of gravity drags you towards the bottom. If you're on wheels, or the surface is slippery, you zoom downhill.
When the gravity in a black hole pulls on objects, it doesn't just move them towards the middle of the black hole. It's so strong, and pulls so hard, it changes their shape.
当你在斜坡上时，重力会把你拖向底部。如果你在轮子上，或者地面很滑，你就急速下下滑。
当黑洞中的引力吸引物体时，它不仅仅把物体移向黑洞的中心。它很强大，拉力很大，会改变物体的形状。
The gravity in a black hole stretches and squishes objects as they get sucked in, making them longer and thinner. In the middle of the black hole, gravity compresses them so tightly, they get crushed down to nothing. If you looked inside a black hole you wouldn't see suns and moons floating about inside it - they have been crushed so small, you wouldn't see anything at all.
当物体被吸入黑洞时，黑洞的引力会拉伸和挤压它们，使它们变得更长、更薄。在黑洞的中心，重力将它们压缩得如此之紧，以至于它们被压得一无所有。如果你观察黑洞的内部，你不会看到太阳和月亮在里面漂浮——它们被压得很小，你根本看不见任何东西。
