Skip to main content

Questions tagged [earth-rotation]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
27 votes
2 answers
2k views

Would the Earth function the same spinning the other way?

Right, I saw a question about why the Earth spins counter clockwise, and it reminded me of something I would like to know the answer to. I watched a episode of Futurama. In this episode the Earth ...
Ruddy's user avatar
  • 381
20 votes
2 answers
6k views

In the northern hemisphere summer, why are places in the north cooler than those in the south?

As the Earth's axis is inclined, during summer in the northern hemisphere places in the north are exposed to the Sun's rays for longer, so days are longer during summer (say in June - Aug). Yet, ...
Leo's user avatar
  • 301
20 votes
4 answers
17k views

Will the Earth ever stop rotating?

It is well known that the Earth's rotation is slowing down and that millions of years ago there was a point in time where there was only a mere 20 hours in a day on Earth. My question is in two parts....
Kenshin's user avatar
  • 7,596
19 votes
3 answers
7k views

Why clouds are not moving in NASA's video of the Moon passing in front of the Earth?

I recently saw a short video from NASA. It shows the moon passing by the Earth as it rotates. NASA link: From a Million Miles Away, NASA Camera Shows Moon Crossing Face of Earth. The video itself ...
Chris Parton's user avatar
18 votes
2 answers
5k views

Does Earth's core actually turn "backwards" at times?

Recent news articles related to this paper report the claim that Earth's solid inner core sometimes rotates backwards. The literal claim (as it appears in headlines) seems to make no sense given a ...
Anthony X's user avatar
  • 621
17 votes
2 answers
474 views

What geophysical events can (temporarily) increase the Earth's rate of rotation?

My understanding is that the dominant factor behind the slowing of the Earth's rotation (i.e. the lengthening of the day) is tidal friction induced by the Moon's gravity. As seen on the graph below, ...
senshin's user avatar
  • 1,885
15 votes
3 answers
417 views

How are Earth's rotational changes due to large earthquakes calculated?

According to NASA (and many other sources), Japan Quake May Have Shortened Earth Days, Moved Axis and in the answers to the question here What geophysical events can (temporarily) increase the Earth's ...
user avatar
14 votes
2 answers
6k views

Effect on sea level if the Earth stopped rotating

Would sea level change at the equator if the Earth stopped spinning? I am assuming it is currently bulging around it due to centrifugal force.
Mazura's user avatar
  • 495
13 votes
1 answer
694 views

Climate on an Earth without an Axial Tilt

The Premise The Earth rotates on its own axis, which is tilted by about 23 degrees. I am imagining a situation where such an axial tilt does not exist. From general reading, it appears the largest ...
Ambarish Sathianathan's user avatar
12 votes
1 answer
2k views

What is the fastest the Earth has ever spun?

How fast can the Earth rotate and support life? In prehistoric times, dinosaurs were so massive that archeologists wonder how they were not crushed under their own weight. Could a faster spinning ...
Muze's user avatar
  • 1
12 votes
2 answers
8k views

Is it true that distance between earth and sun is closer in winter season (January) and farther in summer season in the Northern Hemisphere?

Recently I heard that in winter season the distance between the Earth and the Sun will be closest and it is farthest in summer. If it is true then why is it hotter in summer and cooler in winter?
Hari-pacific's user avatar
11 votes
2 answers
2k views

Was the filling of the Three Gorges Dam's impact on the Earth's rotation rate detectable?

I'm a big fan of Vsauce and the video How Earth Moves is just one example of science related to the Earth available there (there's plenty more). But the statement in this video starting at ...
uhoh's user avatar
  • 7,122
10 votes
1 answer
4k views

How fast does the Earth's inner-core spin?

How fast does the Earth's inner-core rotate compared to the Earth's daily rotation? The inner core is always described as a spinning/rotating solid core while the Earth has a single revolution per ...
EveryBitHelps's user avatar
9 votes
2 answers
5k views

Does the geographic North Pole move?

The magnetic North (or South) Pole moves due to activities in the inner of Earth. And earthquakes can tilt the Earth's orientation a tiny bit. But can and does the axis' orientation relative to the ...
LocalFluff's user avatar
9 votes
3 answers
978 views

Why is this "independently reproducible proof of non-curvature" wrong?

I'm currently having a (possibly useless) argument with somebody over the internet who is adamantly claiming that the Earth is flat. I know that this person could just be pulling my leg or trying to ...
ChipperNickel's user avatar
9 votes
1 answer
5k views

Changes in Earth's orbital and rotation speeds

What are the Earth's maximum and minimum orbital speeds around the Sun? Is there any way to calculate orbital speed at any point of Earth's orbit? Is there a way to relate this to the calendar? Does ...
PSA's user avatar
  • 93
9 votes
1 answer
168 views

How to measure the cycles of earth moving/rotation?

My knowledge of science is very basic, but after some research I have some knowledge, but I am still not clear with so many things regarding to this earth. I have read Laser's Measure the Earth's ...
pitoukhmer's user avatar
8 votes
4 answers
40k views

Why do we say Earth rotates from west to east?

It is said that Earth rotates from west to east. I take this as Earth's western hemisphere moves towards the Eastern hemisphere when seen from the frame of reference of pole star. Now I can also ...
user31782's user avatar
  • 181
8 votes
1 answer
291 views

Could Earth have had a greater axial tilt?

In thinking about the question, Why is earth's axis tilted?, and reading articles about Earth's axial tilt, I came across the website Snowball Earth which describes an alternate theory for global ...
user avatar
8 votes
1 answer
69 views

Is moonlight a significant condition for making life possible on earth?

We know of course that light from the sun is a fundamental component to making life possible on earth because of the energy it provides. Does the light that is reflected off of the moon make a ...
Josh Withee's user avatar
6 votes
2 answers
1k views

Does air in the atmosphere get friction due to the planet's rotation?

Does air in the atmosphere suffer friction in some way due solely to the planet's rotation?
vengaq's user avatar
  • 201
6 votes
2 answers
213 views

Time standard for IERS Bulletin A

IERS Bulletin A and Bulletin B contains Earth orientation parameters. These include the time difference between UT1 and UTC and pole position. The values for these parameters are listed once per day, ...
David Hammen's user avatar
  • 23.7k
6 votes
1 answer
2k views

Is it coincidence that Antarctica is centered on the south pole?

Looking at a globe, Antarctica looks remarkably centered on the south pole. Has the rotation of the earth had any effect on the position of the landmass?
Nathan Fig's user avatar
5 votes
2 answers
763 views

What effect does climate change have on the Earth's rotation?

I recently read a blog entry from a leap-second expert explaining that in near term (i.e. last 3 years) the Earth has been spinning ever so slightly faster, delaying the need to insert a leap-second (...
Oddthinking's user avatar
5 votes
1 answer
120 views

Wobbly Tire Theory -- Is there an existing theory that fits the following description?

I am not an earth scientist but for many years I have wondered about the following. I am curious if this has already been explored by scientists? If so, what is the theory formally called? and what is ...
O.M.Y.'s user avatar
  • 221
5 votes
0 answers
320 views

Did the Three Gorges Dam shift the North Pole by 2 cm?

Numerous sources repeat that, apart from slowing down the rotation of the globe, the Three Gorges Dam caused the geographic pole to shift by 2 cm. For example: https://blog.prv-engineering.co.uk/...
Jacek Musial's user avatar
4 votes
2 answers
2k views

What would happen if Earth suddenly stopped rotating and revolving at the same time?

What will happen if earth stops rotating as well revolving? Will we all be moving with its velocity? It should get displaced from its orbit and move in a tangential direction.
Chloritone_360's user avatar
4 votes
1 answer
2k views

How much of one day can be considered nighttime, on average?

What is the split between night and day on Earth on average? To further clarify, assume we are on the equator, I want to know how long a time, as a percentage, you could consider to be nighttime on ...
Sam Chamberlain's user avatar
4 votes
1 answer
256 views

What (if anything) can be learned from accurately recording tilt motion during seismic events?

The Rotational Motions in Seismology (ROMY) instrument is a giant laser gyroscope used to generate extremely precise 3D rotation measurements of planet Earth. However at the end of the video below ...
uhoh's user avatar
  • 7,122
4 votes
1 answer
179 views

What would be the depth variation of a "water ellipsoid" above a reference ellipsoid Earth?

The question If the Earth was a smooth spheroid how deep would be the ocean? has an excellent answer which explains the shape and surface area of an oblate spheroid before calculating the average ...
uhoh's user avatar
  • 7,122
4 votes
1 answer
177 views

Can Coriolis Effect cancel itself?

Say a plane moves from 40° North to 40° South, and the plane flies in straight line without considering the Coriolis effect. Will it still reach the destination. All I mean is whether the deflection ...
turing's user avatar
  • 41
4 votes
0 answers
245 views

Is daylight time symmetrical between northern and southern hemisphere?

At lat +50.0 on Jun 21 and lat -50.0 on Dec 21 is the time between sunrise and sunset exactly the same? And so on throughout the parallels and the days of the year? If not can you explain why? I ...
Joe C's user avatar
  • 141
3 votes
2 answers
2k views

why we don't have solar eclipse every month?

The moon takes about a month to orbit around the Earth. So why we don't have solar eclipse every month?
karthikdivi's user avatar
3 votes
2 answers
2k views

What would be the impact on tides if the earth had no tilt?

I would like to know what would be the impacts/effects on the tides if earth were to have no tilt (perpendicular to plane of ecliptic)?
Kait's user avatar
  • 111
3 votes
2 answers
118 views

Earth rotation speed on the same longitude

Do all points on the earth surface have with the same longitude the same day and night times, i.e. does the earth rotate around it's own axis with the same speed for all points on the same longitude?
Student's user avatar
  • 131
3 votes
1 answer
166 views

Are there any types of winds or waves that are produced just by Earth's rotation?

Are there any types of wind or waves caused and produced only and exclusively by Earth's rotation? Not influenced by Earth rotation, but produced solely by it? In the case of waves, are Rossby waves 1 ...
vengaq's user avatar
  • 201
3 votes
1 answer
219 views

How is centrifugal force identified in equations of fluid motion in the rotating reference system of earth?

I spent already days on the following: In one of my meteorology scripts the equations for conservation of momentum in the rotation reference system of earth are given by: The apparent forces are in ...
MichaelW's user avatar
  • 935
3 votes
1 answer
2k views

How much do tides affect earth's rotational velocity?

Many of us are familiar with an exaggerated picture of the Moon's effect on Earth's tides: Since the Earth is not uniformly covered with water, however, I imagine that the tidal effect will depend on ...
Ben Sandeen's user avatar
3 votes
0 answers
62 views

Query about inclination in Earth's axis of rotation

Earth revolves around the Sun in a elliptical path, situated on one of the Sun's focal points. If Earth is considered as a large body with mass attracted towards the Sun's core causing its revolution ...
user637827's user avatar
3 votes
1 answer
526 views

Calculating Solar Noon from Sunrise and Sunset [closed]

I've seen the solar noon formula described as snoon = 720 – 4*longitude – eqtime. I'm curious if it is equally reliable within a relatively small margin of error (+-...
Brad's user avatar
  • 139
2 votes
2 answers
389 views

Flight time differences between flying east and flying west

Why is it that flying west takes longer than flying east despite the fact that the Earth is rotating eastward around its own axis? I had always thought flying west would take shorter than flying east ...
Centaurus's user avatar
  • 205
2 votes
2 answers
155 views

Terrestrial Day vs. Venusian Day: Why the Huge Time Difference?

The diameters of Venus (7,520.8 miles) and Earth (7,917.5 miles) are comparable, but the disparity of the length of the day for each planet - as expressed in terrestrial hours - is enormous; a day on ...
Jessica's user avatar
  • 149
2 votes
1 answer
130 views

We know that the earth is rotating from west to east.Has the earth ever rotated from east to west in past,or any possibilty it may in future? [closed]

We know that the earth is rotating from west to east (anti-clockwise) Has the earth ever rotated from east to west in past,in early times after earth has formed? And/or is there any scientific ...
S. Y.'s user avatar
  • 21
2 votes
1 answer
719 views

The apparent path of the sun

An American College Test sample question asks: Based on the shadow directions in these experiments, which of the following best describes the difference between the apparent path of the Sun as seen ...
Andy's user avatar
  • 37
2 votes
1 answer
229 views

Has extracting oil and mining changed the earth rotational speed?

NASA has calculated that the Three Gorges Dam in China dam slows the Earth's rotation by 0.06 microseconds (reference https://www.kinetica.co.uk/2014/03/27/chinese-dam-slows-down-earths-rotation/). ...
Techboy's user avatar
  • 121
2 votes
1 answer
89 views

How does rotating water affect turbulence?

I have been doing some DIYnamics with rotating water and non-rotating water. So I had a bucket filled with water on a rotating table, and waited for it to be in solid body rotation. I then dropped ...
Mathomat55's user avatar
2 votes
0 answers
17 views

Why does the Earth's pole precess clockwise in this data set, rather than counter-clockwise?

This is something of a technical question, and it may not be on topic. But I've managed to thoroughly confuse myself about it and I figured if any Stack could help me it would be this one. It is ...
Michael Seifert's user avatar
2 votes
0 answers
49 views

Earth revolve Around the sun. [closed]

Why earth revolve around the sun in oval axis. Why not in round axis? If the gravitational force of the sun is same at every place .
Vikash Khurana's user avatar
1 vote
2 answers
278 views

Do Earth's layers move at different speeds?

I don't have a background in Geology but this question popped in my head the other day and can't find an answer anywhere else. If I remember science class correctly, Earth's layers have different ...
user62099's user avatar
1 vote
3 answers
156 views

Why is it still day in Mumbai at 6:47 PM?

I captured this news channel picture on Sept 11 2018 from India. We can clear see It is live telecast from Mumbai, but it is still day time.
Mario Badstuber's user avatar