Earth's rotation or Earth's spin is the rotation of planet Earth around its own axis, as well as changes in the orientation of the rotation axis in space. Earth rotates eastward, in prograde motion. As viewed from the northern polar star Polaris, Earth turns counterclockwise. The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is the point in the Northern Hemisphere where Earth's axis of rotation meets its surface. This point is distinct from Earth's North Magnetic Pole. The South Pole is the other point where Earth's axis of rotation intersects its surface, in Antarctica. Earth rotates once in about 24 hours with respect to the Sun, but once every 23 hours, 56 minutes and 4 seconds with respect to other distant stars. Earth's rotation is slowing slightly with time; thus, a day was shorter in the past. This is due to the tidal effects the Moon has on Earth's rotation. Atomic clocks show that a modern day is longer by about 1.7 milliseconds than a century ago, slowly increasing the rate at which UTC is adjusted by leap seconds. Analysis of historical astronomical records shows a slowing trend; the length of a day increased about 2.3 milliseconds per century since the 8th century BCE. Scientists reported that in 2020 Earth had started spinning faster, after consistently spinning slower than 86,400 seconds per day in the decades before. On June 29, 2022, Earth's spin was completed in 1.59 milliseconds under 24 hours, setting a new record. Because of that trend, engineers worldwide are discussing a 'negative leap second' and other possible timekeeping measures. This increase in speed is thought to be due to various factors, including the complex motion of its molten core, oceans, and atmosphere, the effect of celestial bodies such as the Moon, and possibly climate change, which is causing the ice at Earth's poles to melt. The masses of ice account for the Earth's shape being that of an oblate spheroid, bulging around the equator. When these masses are reduced, the poles rebound from the loss of weight, and Earth becomes more spherical, which has the effect of bringing mass closer to its centre of gravity. Conservation of angular momentum dictates that it spins faster, like a spinning ice skater drawing their arms in, causing them to spin faster. (Wikipedia).
In a previous video, we did the math for just how fast you're moving at the Earth's equator as it spins in space. This time around, we explain exactly "why" the Earth is spinning in the first place. It's all about inertia and the conservation of angular momentum. http://www.universetoday.
From playlist Planets and Moons
Astronomy - Ch. 7: The Solar Sys - Comparative Planetology (16 of 33) Planet's Tilt
Visit http://ilectureonline.com for more math and science lectures! In this video I will discuss the various planet inclinations of the equator to orbit in our Solar System. Next video in this series can be seen at: http://youtu.be/SNf3ppk1UY8
From playlist ASTRONOMY 7B THE SOLAR SYSTEM - COMPARATIVE PLANETOLOGY
How Fast Does the Earth Rotate?
In this short video, Universe Today publisher Fraser Cain does the math to help you understand just how fast you're spinning in space right now, and how you'd actually gain a little weight if the Earth stopped spinning. Based on this article from Universe Today: http://www.universetoday.c
From playlist The Solar System
Astronomy - Ch. 3: Motion of the Moon (1 of 12) The Moon's Orbit
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the orbit of our Moon relative to Earth.
From playlist ASTRONOMY 3 MOTION OF THE MOON
The Earth spins on its axis, completing a full revolution every day. By why does it do this? One of the most common misconceptions in physics is the belief that constant motion requires a constant force. So many people believe there must be some force in the Earth (e.g. gravity, centrifuga
From playlist Light Speed, Rockets, Science, OH MY! - YouTube Space Lab
Physics - Mechanics: Gravity (5 of 20) The Effect of Earth's Rotation on Gravity
Visit http://ilectureonline.com for more math and science lectures! In this video I will calculate the effects of Earth's rotation on gravity.
From playlist PHYSICS 18 GRAVITY
Circular Motion - A Level Physics
Consideration of Circular Motion, orbital speed, angular speed, centripetal acceleration and force - with some worked example.
From playlist Classical Mechanics
8.01x - Module 10.01 - Circular orbit of satellite around Earth.
Circular orbit of satellite around Earth. What is its period?
From playlist 8.01x - MIT Help Sessions
What is the difference between rotating clockwise and counter clockwise
đŸ‘‰ Learn how to rotate a figure and different points about a fixed point. Most often that point or rotation will be the original but it is important to understand that it does not always have to be at the origin. When rotating it is also important to understand the direction that you will
From playlist Transformations
How We Proved Earth Rotates Using a Giant Swinging Ball
People have suspected that Earth rotates for thousands of years, but how did we first prove it? Hosted by: Stefan Chin ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Kevin Bea
From playlist What Fraser's watching
Astronomy - Ch. 7: The Solar Sys - Comparative Planetology (18 of 33) Planet Rotational Period
Visit http://ilectureonline.com for more math and science lectures! In this video I will discuss the various rotational periods of the planets in our Solar System. Next video in this series can be seen at: http://youtu.be/Pn_kSjcfm44
From playlist ASTRONOMY 7B THE SOLAR SYSTEM - COMPARATIVE PLANETOLOGY
Astronomy 101: Motion of the Celestial Sphere
Skynet University: http://skynet.unc.edu/introastro Use Our Telescopes From Anywhere! Astronomy 101: The Solar System Lesson 1: Celestial Motions Topic: Motion of the Celestial Sphere Next: Sun-Earth-Moon Scale Model (http://youtu.be/ksLErDRXFi8) Previous: Constellations and the Cel
From playlist UNC: Astronomy 101 by Skynet University | CosmoLearning.org Astronomy
Astronomy - Ch. 2: Understanding the Night Sky (1 of 23) The Motions of Earth
Visit http://ilectureonline.com for more math and science lectures! In this video I will introduce the 6 motions of the Earth: rotation, orbits, precession, barycenter, ellipticity, and tilt.
From playlist ASTRONOMY 2 THE NIGHT SKY
Astronomy - Ch. 3: Motion of the Moon (11 of 12) Why Do We Only See One Side of the Moon?
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain why the we only see one side of the moon.
From playlist ASTRONOMY 3 MOTION OF THE MOON
Astronomy 101: Heliocentric Models
Skynet University: http://skynet.unc.edu/introastro Use Our Telescopes From Anywhere! Astronomy 101: The Solar System Lesson 2: Copernican Revolution Topic: Heliocentric Models Next: Â Galilean Revolution (http://youtu.be/i0ivBULSsdM) Previous: Geocentric Models (http://youtu.be/oJ51
From playlist UNC: Astronomy 101 by Skynet University | CosmoLearning.org Astronomy
Coding Challenge #58: 3D Earthquake Data Visualization
In this Coding Challenge, I follow up on the Earthquake Data Visualization challenge and create a 3D version in Processing (Java) using spherical coordinates. I also discuss some 3D vector math including the cross product. đŸ’»Challenge: https://thecodingtrain.com/CodingChallenges/058-earthq
From playlist Coding Challenges
Star Paths: The Magic Of Observational Astronomy (Part 1)
Credit to: Veena Srinivasan (Animation and Graphics) See Part 2: https://www.youtube.com/watch?v=BuQMhBjN5AI Correction: At 12:13 I meant to say simply "zenith angle" and "azimuth angle" rather than "solar zenith angle" and "solar azimuth angle" ; the latter terms would refer solely to the
From playlist Summer of Math Exposition Youtube Videos
Unexpected Link Between Earth Rotation and Great Oxygenation Event
Good telescope that I've used to learn the basics: https://amzn.to/35r1jAk Get a Wonderful Person shirt: https://teespring.com/stores/whatdamath Alternatively, PayPal donations can be sent here: http://paypal.me/whatdamath Hello and welcome! My name is Anton and in this video, we will tal
From playlist Amazing Planet Earth
In this short video explainer, Universe Today publisher Fraser Cain explains why we only see one side of the lunar surface, and yet, the Moon does rotate. http://www.universetoday.com/19699/does-the-moon-rotate/ -------------------- Have you ever noticed that the Moon always looks the s
From playlist Guide to Space
Rotation and Torque - Physics 101 / AP Physics 1 Review with Dianna Cowern
Lesson 14 (Rotation and Torque) of Dianna's Intro Physics Class on Physics Girl. Never taken physics before? Want to learn the basics of physics? Need an AP Physics 1 review before the exam? This course is for you! Exercises in this video: 1. If you are standing on Earth’s equator (radi
From playlist Dianna's Intro Physics Class/ Physics 101/ AP Physics 1 Review with Physics Girl