Black hole (BH) but if it starts getting to BHN Bullet Head Nebula then it will be confusing. The artists impression was good and so not right. From sums years ago to create a worm hole a half metre high would take the energy of the sun for a second.

The problem is that a worm hole on our level or even a star requires space to be plastic, malleable so that it can be stretched, pushed dragged or in this case have a hole poked through it. The next diagram is the better diagram as it shows the flat circular nature of the worm hole in the same style as the rubber sheet analogy.

So if it could be done then why is it still wrong on the streets of New York. Well the energy within the gateway would shred who so ever stepped any where near a worm hole that size. The rest position of all that is between that opening and the other end would have a gravitational effect. The light between the gate and a point in the distance where space was stretched beyond the capacity of light to get back to the opening would create a disk of utter darkness.

Now that does not sound like the worm hole every one is familiar with but if a work hole is to work space must be like plastic and poking a hole through from one side to another with the times stretching to balance. For a worm hole to work space must be something, vacuum is not empty.

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"Nature is obliged to let reality determine its laws, whereas mathematics is under no such constraint."