How do astronauts sleep and maintain hygiene in space?

Astronauts sleep and maintain hygiene in space using specialized routines adapted for microgravity:

• Sleeping: Astronauts sleep in individual sleeping quarters inside sleeping bags attached to the walls, keeping them from floating around. They typically follow a 24-hour schedule with about 8 hours of sleep daily, and use eye masks and earplugs to block light and noise inside the International Space Station (ISS).
• Hygiene: Without showers in space, astronauts use rinse-less body wipes, no-rinse shampoo, and toothpaste. They use vacuum-assisted toilets that suction waste away, preventing it from floating. Regular cleaning routines help maintain hygiene and prevent bacterial growth in the spacecraft.

These systems ensure astronauts stay clean, healthy, and well-rested during their missions in microgravity environments.