Planetary density will decrease. Planetary years will become longer. Planetary days will become shorter. Planetary gravity will become stronger.
An astronomer observes that a planet rotates faster after a meteorite impact. Which is the most likely effect of this increase in rotation?

Options:
- Planetary density will decrease.
- Planetary years will become longer.
- Planetary days will become shorter.
- Planetary gravity will become stronger.

Planetary days will become shorter.