Meaning: The astronauts had no weight or felt like they were floating in space.
Choice of Words: Weightless means not having any weight or feeling like you're floating. Astronauts are people who travel in space.
Alternative Expressions
The astronauts floated in space.
Meaning: This means that the astronauts moved through space smoothly and easily because there was no gravity pulling them down.
Choice of Words: **Astronauts** are people who travel in space. **Floated** means that they moved smoothly and gently through the air without any effort. **In space** tells us where the astronauts were when they floated.
The astronauts were like feathers in space.
Meaning: This means that the astronauts were so light and moved so easily in space that they were like feathers floating in the air.
Choice of Words: **Astronauts** are people who travel in space. **Like feathers** means that they were very light and moved easily. **In space** tells us where the astronauts were when they were like feathers.