This is a fun question! It's based on a common misconception about space travel. Here's the breakdown:

* Astronauts haven't reached the speed of light. It's currently impossible with our technology. The speed of light is an absolute limit in the universe.

* Spacecraft use engines, not magic. While they don't use the same engines as cars, they still use propulsion systems (like rockets) to accelerate.

* The "warp drive" is science fiction. In Star Trek, the fictional "warp drive" is used for faster-than-light travel, but it's not a real thing.

Let me know if you'd like to learn more about rocket engines and how they work!