Black hole

A black hole is a region in space-time where gravity pulls so much that even light can not get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.

Because no light can get out, black holes cannot be "seen" in the conventional sense. They are generally invisible to the Humanoid eye, though can be observed through the absence of light, or when light and objects are pulled into them. Black holes can range from microscopic to what are referred to as "supermassive" black holes. There can also be stellar black holes, a type whose mass can be up to 20 times more than the mass of
Earth's sun.

• Stellar black holes are made when the center of a very big star falls in upon itself, or collapses.
  When this happens, it causes a supernova - an exploding star that blasts part of the star into space.

When a black hole and a star are close together, high-energy light is made, another kind of light that cannot be seen with Humanoid vision.

Conventional black holes are formed by gravitational collapse of heavy objects such as stars, but can also be formed by other processes, such as high-energy collisions that achieve sufficient density.

Once a black hole has formed, it can continue to grow by absorbing additional matter. Any black hole will continually absorb gas and interstellar dust from its surroundings.