Planet was an early steam locomotive built in 1830 by Robert Stephenson and Company for the Liverpool and Manchester Railway.
Replica of Planet operating at the Museum of Science and Industry
A contemporary engraving of a locomotive "similar to the Planet", though with some differences in detail
Stephenson's Rocket is an early steam locomotive of 0-2-2 wheel arrangement. It was built for and won the Rainhill Trials of the Liverpool and Manchester Railway (L&MR), held in October 1829 to show that improved locomotives would be more efficient than stationary steam engines.
A contemporary drawing of Rocket
A replica coach and Rocket at the Rocket 150 event
Rocket as preserved in the Science Museum, London.