Enlarged Spleen Overview. The spleen is an important organ in the immune system. It is a bean shaped structure, located in the left upper portion of the abdominal cavity, under the diaphragm, tucked in between the 9th and 11th ribs, in the mid-back.
Chandra and NASA's Hubble Space Telescope later collected data from the event's afterglow, and together the observations led astronomers to conclude that the powerful explosions can result when a black hole and a neutron star collide, producing another black hole.
The object formed with radius 1/3 from the earth is a Newtonian black hole. It has many properties in common with the black holes of general relativity. Most importantly, they both have the same size. As the collapse proceeds, energy is released in larger and larger amounts.