Strands#265 Did You Hear That?
Quizzes & Puzzles4 mins ago
The Earth - how many revolutions per year?
Assuming that an Earth year is exactly 365 days, ignoring leap years and any fractions. How many revolutions does the Earth make about its axis in one year?
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The term revolution typically refers to the period of time required for a planet, moon, or other object, to complete one orbit around another.
The Earth revolves once around the Sun after slightly more than one year relative to the stars.
discussion here.
The Earth revolves once around the Sun after slightly more than one year relative to the stars.
discussion here.
The 3 stars go to mibn2. Sorry Eurox, I said ignore fractions.
If the earth did not spin on its axis at all, the sun would move around the sky (viewed from earth) exactly once and there would be 1 day = 1 year. i.e. you get 1 day/revolution more or less, as mibn2 says to "compensate for the annual trip around the sun".
I didn't know if it was additive to give 366 or subtractive to give 364. That's an interesting link, thanx mibn2, I shall digest it at leisure, later.
If the earth did not spin on its axis at all, the sun would move around the sky (viewed from earth) exactly once and there would be 1 day = 1 year. i.e. you get 1 day/revolution more or less, as mibn2 says to "compensate for the annual trip around the sun".
I didn't know if it was additive to give 366 or subtractive to give 364. That's an interesting link, thanx mibn2, I shall digest it at leisure, later.
Whils't we are on the theme of the earth revolving around the sun - here is what is probably an elementary question , which i probably should remember from my school days
If the earth is rotating fully , once on it's axis every 24 hours AND at the same time revolving around the sun - why do some parts of the world have different seasons while other parts experience constant 'summertime ' ?
If the earth is rotating fully , once on it's axis every 24 hours AND at the same time revolving around the sun - why do some parts of the world have different seasons while other parts experience constant 'summertime ' ?
Phil7, Once confirmed it may help to remember that all planets revolve (and most rotate) in a counter-clockwise motion around the Sun when viewed from above the Solar System from the direction of The Cat�s Eye Nebula (see General information) near the North Ecliptic Pole.
Planetary motion in the Solar System
Planetary motion in the Solar System
Bazile, Relative to the stars the Earth completes one rotation in slightly less than 24 hours since it has also traveled a part of it annual journey around the Sun during that time.
The seasons are a result of the Earth�s axis of rotation be tilted relative to the plane of its orbit around the Sun. This effects the duration and angle of the Sun above the horizon at various parts of the Earth over the course of the year. Within equatorial regions the noonday Sun passes nearly overhead throughout the year.
the reasons for the seasons
The seasons are a result of the Earth�s axis of rotation be tilted relative to the plane of its orbit around the Sun. This effects the duration and angle of the Sun above the horizon at various parts of the Earth over the course of the year. Within equatorial regions the noonday Sun passes nearly overhead throughout the year.
the reasons for the seasons
It seems a bit strange to me that, if the Earth did not rotate about its axis, there would be one day per year; if it rotated once a year, there would be no days (the Sun would appear to be in the same place in the sky all the time); but if the Earth rotated twice, then there would, again, be one day in the year. The difference between no revolutions and two revolutions is that the Sun would appear to be going in opposite directions during that very long day.
Bert, I think the answer is that the extra day is always additive.
0 revs. = 1day, 1 rev. = 2 days, etc.
You're thinking of 1 rev. in the opposite direction, which similar to the moon around the earth, would result in 0 days - the earth always presenting the same face to the sun.
cheers, Phil. (sorry didn't see for ages - computer upgrade...!).
0 revs. = 1day, 1 rev. = 2 days, etc.
You're thinking of 1 rev. in the opposite direction, which similar to the moon around the earth, would result in 0 days - the earth always presenting the same face to the sun.
cheers, Phil. (sorry didn't see for ages - computer upgrade...!).
dam, where were you on Christmas Day when we needed ya? quack
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