sentences:  The magnetic field of this star has increased the surface temperature to 18 million K and it releases enormous amounts of energy in gamma ray bursts.Jets of relativistic plasma are often observed along the direction of the magnetic poles of active black holes in the centers of very young galaxies.In 2008, a team of astronomers first described how as the exoplanet orbiting HD 189733 A reaches a certain place in its orbit, it causes increased stellar flaring.