The fastest objects observed in the universe are blobs of superheated plasma, ejected from black holes in the cores of extremely active galaxies known as blazars. These blobs, with as much mass as the planet Jupiter, have been observed moving at 99.99% of the speed of light.

According to Albert Einstein’s Theory of Special Relativity, the only thing capable of travelling at the speed of light, 299,792,458 m/s, is light itself. When matter is accelerated to significant fractions of the speed of light, it takes more and more energy to accelerate it further.