If the earths spin motion was in the opposite direction, would a sidereal day be longer or shorter than a sol

Question

if the earths spin motion was in the opposite direction, would a sidereal day be longer or shorter than a solar day? draw diagrams to support your anwer.

Answer 1

Time would reverse itself

Answer 2

As things are right now, the sidereal day is shorter than the solar day. The sidereal day is 1 complete 360-degree rotation of the Earth relative to the "fixed" star background. This is slightly less than 24 hours because while the Earth rotates, it also travels a bit around the Sun, so the Earth has to rotate a bit more than 360 degrees in space for the Sun to make 1 full circle through the sky as seen from Earth's surface.

If the Earth's rotation were in the opposite direction, the opposite would be true. The sun would complete a trip through the sky in less time than it takes for the Earth to rotate a full 360 degrees in space.

So the answer is that a sidereal day would be longer than a solar day in this scenario.

Imagine the hands of a clock, starting at 12 o'clock. The minute hand returns to twelve, but the hour hand has moved to the 1 position. It will be about another 6 minutes before the minute hand catches up to the hour hand again. The minute hand would be analogous to the sidereal period, while its full trip relative to the hour hand would be analogous to the solar period. Imagine the minute hand going backward, but the hour hand still going forward - that is basically the scenario in your question.

Answer 3

There Would Be No Change.

The Earths Spin Is Not Involved In Sidereal Days.

See Link Below.

Answer 4

The sideral day is sligthly shorter than the solar one and the sideral year is one day longer than the solar one.

This is the same reason why you win a day by circumnagivating the earth eastward, and loose one when doing it westward. It was the only ship that survived Magellan's expedition that realised that for the first time.

The fact that the sideral year is 366.25 days is because, by orbiting once around the sun, the earth looses one day. If the earth spins on itself the other way, then the solar year must be 367.25, isn't it? And therefore a solar day would be shorter but not the sideral day which is the reference to the starry background.

Answer 5

It only means Sun rises in the west instead of east. Oceanic currents and winds will be opposite to what are they now. Others like sidereal day are independent of these. There is no need for any diagram for this.