What's supposed to be in M87?

Answer 1

at the center of M87 is supposed to be a super massive black hole.

here are some of the pictures
http://www.seds.org/messier/more/m087_jet.html


this jet is thought to be the light and gases from material in the accretion disk of the black hole, that has gone to the speed of light and escaped before being pulled into the supermassive black hole.

Here is what wikipedia says
This jet extends at least 5000 light-years from the nucleus of M87 and is made up of matter ejected from the galaxy, most likely by a black hole (a fact made more likely by the discovery of a disk of rapidly rotating gas around the nucleus of M87). Astronomers believe that the black hole in this galaxy has a mass of approximately 3 billion (3×109) solar masses. M87 has also been found to be a strong source of X-rays. Its proximity means that it is one of the best studied radio galaxies.

Answer 2

A massive black hole like the ones found in every galaxy.