In the asteroid belt , while Janet is trying to collect an asteroid as further proof , they lose Ms. Frizzle and find themselves lost in space .
The class explores Mercury , Venus , and Mars , while Janet collects proof of their voyage .
In the asteroid belt , while Janet is trying to collect an asteroid as further proof , Mercury lose Ms. Frizzle and find themselves lost in space .
The class explores Mercury , Venus , and Mars , while Janet collects proof of their voyage .