This drive would get us up close to the speed of light.

This means that they easily move at speeds close to the speed of light.

When these particles move close to the speed of light, they can live long enough to get here from other stars.

This is not noticed until the object is moving close to the speed of light.

This effect is only really significant for objects moving at speeds close to the speed of light.

Some scientists favored hot dark matter, particles that traveled close to the speed of light.

How close to the speed of light had he gone?

In almost a thousand years, moving close to the speed of light, there must have been.

If you are looking at something moving close to the speed of light, you need relativity.

However, because the ship must come close to the speed of light to invert, travel still takes time.