Will astronauts get lost without the earth?

On the earth, people mainly use the earth's magnetic field to identify the direction, that is, with a compass.

In space, there is no magnetic field, so in space, gyroscopes are mainly used to identify directions. Gyroscopes rely on their own high-speed rotation to maintain stability in one direction, rather than relying on magnetic fields.

Since you can tell the direction in space and find the reference, you shouldn't get lost.