| dangling | swinging loosely |
| noise | loud sounds |
| coin | metal piece of money |
| tour | a trip visiting places |
| solar system | the Sun and the planets |
| aboard | on something |
| guide | person leading a trip |
| already | before now |
| dangerous | unsafe |
| thunder | loud noise in storm |
| rotates | turns in a circle |
| orbit | planet’s path around a sun |
| astronomer | solar system expert |
| fiercest | wildest |
| bargain | a deal |