Why is the solar day longer than the sidereal day?

The Earth moves along its orbit, so it must turn a little extra to face the Sun again

What causes the phases of the Moon?

Our changing view of the Moon's sunlit half as it orbits

The 23.5 degree tilt of the Earth's axis

Apparent Solar Time minus Mean Solar Time

The elliptical orbit (changing speed) and the axial tilt (obliquity)

Mean Solar Time on the Prime Meridian (the same as Universal Time)

By keeping Greenwich time, which is compared with local time to give longitude

12questions. Pick an answer and you'll see why right away.

How long is a sidereal day?
Why is the solar day longer than the sidereal day?
How long is the synodic month (the lunar phase cycle)?
What causes the phases of the Moon?
What causes the equinoxes and solstices?
What is the Equation of Time?
A sundial reads 12:14 (AST) and a clock reads 12:00 (MST). What is the Equation of Time?
Which two effects cause the annual variation of the Equation of Time?
How many degrees of longitude correspond to a one hour difference in local time?
Two places differ by 45 degrees of longitude. What is their difference in local solar time?
What is Greenwich Mean Time (GMT) defined as?
How did Harrison's marine chronometer help find longitude (the horological method)?