Image of arp 299 in x-ray
arp 299 is a designation for two galaxies colliding in the constellation of ursa major. the one in the upper left is ic 694, and the one below it is ngc 3690. these two galaxies has been colliding for millions of years, slamming interstellar clouds, triggering a burst of star formation.
but what's interesting is that in 2005, when scientists were looking at the core of ngc 3690, they discovered something strange. a strong radio wave source is moving at 99.5% the speed of light. no supernova can cause this. there is only one possibility; there is an event where a star is totally ripped apart to shreds.
scientists predicted that a star is going too close to the core of ngc 3690, and this caused the star to be torn to pieces by the strong gravitational tidal force of the central black hole of ngc 3690.