Our galaxy might be even bigger than you think. Learn about the solar system and Einstein's Theory.

The kids ask astronauts questions about what life is like in space.

Hilda and Lowly are looking at the starry night sky, but Hilda wants to take a closer look at the stars. Lowly suggests using a telescope.

The crew of the Enterprise have traveled back in time from the 24th century to make sure that a pivotal moment in their history occurs, the warp drive rocket launch that would lead to human's first contact with aliens. They find the inventor of warp drive and captain of that crucial launch, Zephraim Cochrane, and make him realize the importance of his role.

Victor Hess tests his own hypothesis of cosmic radiation by using a hot air balloon and checking the radiation in the atmosphere. He noticed that it did indeed increase as he traveled higher up in the air.