at what speed does the fastest flying objecct in space travel?

There's no way to answer that. Speed can only be measured relative to a stationary object; and there are no stationary objects in space.

the fastest flying objects in the space are photons that are in light. They travel with the highest speed yet known that is 300000 km/s.

tachyons are still hypothetical particles. There are still doubts about their existance and speed. It is not yet proved.

Light travels at 299,792,458 meters per second (exact value). There are some plasma ions that travel almost that fast, like 99.9999% of light speed.

a photon travels at 186,000 miles/second. (speed of light)

scientists have recently discovered new particles called tachyons..These can travel more than the speed of light.

186,282.397 miles per second, a particle (object) photon

Light travels at light speed, the fastest speed possible by General relativity.

As everybody knows the fastest travelling object is PHOTONS.I haven't heard of other objects yet like trachyons....

3.00 x 10^8 m/s -- speed of light -- this is why it takes 8.333.. minutes for the light rays of the sun to reach us.