Day and Night
- Earth turns eastwards – this mean that our Sun rises in the east as each part of the world spins round to face the Sun.
- as Earth turns – the stars come back to the same place in the night every 23 hours, 56 minutes and 4.09 seconds – this is called a sidereal day or star day.
- Earth takes 24 hours for the Sun to come back to the same place in daytime sky – this is solar day, and it is slightly longer than the star day because the earth moves one degree further round the Sun each day.
- for each planets – the length of day depends on how fast it spins and sometimes its speed in orbit.
- a day on Jupiter lasts less than 10 hours because Jupiter spins so fast!
- a day on Mars is 24.6 hours – similar to a day on Earth.
Did you know?
- a day on the Moon lasts nearly one month.
Back to The Solar System page.