Last week, the International Earth Rotation and Reference Systems Service announced there will be a leap second at the end of June. hpiers.obspm.fr/iers/bul/…
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πŸ‘€︎ u/nowisthetim3
πŸ“…︎ Jan 12 2015
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Since the earth "rotates", the rest of the solar system does actually revolve (irregularly and elliptically) around the earth if you change the frame of reference to consider the earth as stationary.

if you think about it, since the earth rotates, the rest of the solar system does actually revolve (elliptically) around the earth if you change the frame of reference to consider the earth as stationary.

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πŸ‘€︎ u/trebulched
πŸ“…︎ Mar 27 2019
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Earth Geography & Solar System : Antarctic circle, Arctic circle, Axis of Earth, Big Bang Theory, Earths rotation, International date line, Latitudes, Longitudes, lunar eclipse, Moons orbit, rotation of earth, rotation of moon, solar eclipse, Solar System, Tropic of Cancer, Tropic of Capricorn iasmania.com/earth-geogra…
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πŸ‘€︎ u/iasmania
πŸ“…︎ Nov 23 2014
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TIL there is a scientific organization called International Earth Rotation Service en.wikipedia.org/wiki/Int…
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πŸ‘€︎ u/aaaaaaaarrrrrgh
πŸ“…︎ Jan 10 2015
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International Earth Rotation Service Calls for a Leap Second at 12/31/08 Midnight greenpacks.org/2008/12/24…
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πŸ‘€︎ u/ZhongHuaRising
πŸ“…︎ Dec 24 2008
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If you sat on a spinning chair and spun opposite to the direction of the Earth's rotation at roughly 7.29 Γ— 10βˆ’5 radians per second (angular velocity of the Earth), then in reference to your position in space and not the planet you wouldn't be rotating at all

Edit: Forgot to mention on the North/South Pole

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πŸ‘€︎ u/IgnorantCadaver
πŸ“…︎ Apr 27 2019
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An easy reference for domains and weekly boss rotations [Updated V2.4]
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πŸ‘€︎ u/zoruki
πŸ“…︎ Nov 25 2021
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Report suggests climate change could end human civilization by 2050 - The report cautions that β€œplanetary and human systems [are] reaching a β€˜point of no return’ by mid-century, in which the prospect of a largely uninhabitable Earth leads to the breakdown of nations and the international order abcactionnews.com/news/na…
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πŸ‘€︎ u/Dismal_Prospect
πŸ“…︎ Jun 04 2019
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For every 2 orbits of the Sun, which takes around 88 Earth days, Mercury completes three rotations of its axis. It is gravitationally locked and this rotation is unique to the solar system. universetoday.com/14334/h…
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πŸ‘€︎ u/FillsYourNiche
πŸ“…︎ Dec 31 2019
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Is it theoretically possible that if enough weight was placed at one point on the Earth's surface it could affect the Earth's gravity and delicately balanced rotation within our solar system?
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πŸ‘€︎ u/Mitche420
πŸ“…︎ Jun 23 2020
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When you are on the teacup ride at an amusement park you are spinning 5 times. The teacup spins twice(around its centre and around the track), then the earth spins twice(its own rotation and its orbit around the sun), and the solar system around the centre of the galaxy.
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πŸ‘€︎ u/cinos54
πŸ“…︎ Nov 11 2019
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ELI5: if earth does a full rotation of it’s axis in 24 hours in an eastward direction, what (theoretically) prevents a transport system from being built which would go straight up, and then straight back down again in a place west of your origin, taking advantage of the earths rotation?
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πŸ‘€︎ u/emelsewhere
πŸ“…︎ Feb 27 2018
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"Five of six Expedition 59 crewmembers gather inside Russia's Zvezda service module for dinner as a pizza loaded with toppings floats above the galley" while orbiting Earth inside the International Space Station on 14 June 2019. Photo credit: National Aeronautics and Space Administration (NASA)
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πŸ‘€︎ u/trot-trot
πŸ“…︎ Apr 22 2020
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The first IT departments arose in the mid 1800s: they purchased, distributed and serviced computers at railroad companies - computers to track the Earth's rotation - the pocket watches and station clocks infrastructure critical to the safe operations of rail passenger and freight service.
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πŸ‘€︎ u/Sir-Hops-A-Lot
πŸ“…︎ May 13 2020
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Dropped off my S for a tire rotation and some service bulletins. This is my loaner. (cow for size reference) instagram.com/p/iKLWmRic5…
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πŸ‘€︎ u/null_value
πŸ“…︎ Dec 20 2013
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Earth's rotation, with the Milky Way as reference (details in comments) v.redd.it/92wcfv2cev621
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πŸ‘€︎ u/Zevediah
πŸ“…︎ Dec 27 2018
🚨︎ report
Report suggests climate change could end human civilization by 2050 - The report cautions that β€œplanetary and human systems [are] reaching a β€˜point of no return’ by mid-century, in which the prospect of a largely uninhabitable Earth leads to the breakdown of nations and the international order abcactionnews.com/news/na…
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πŸ‘€︎ u/ReinhardtWVWB
πŸ“…︎ Jun 04 2019
🚨︎ report
Because of earth’s rotation (on it self and around the sun), the solar system’s rotation and the galaxy’s rotation, we’re constantly moving at unimaginable speed.
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πŸ‘€︎ u/xX_JoeStalin78_Xx
πŸ“…︎ May 28 2018
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"Five of six Expedition 59 crewmembers gather inside Russia's Zvezda service module for dinner as a pizza loaded with toppings floats above the galley" while orbiting Earth inside the International Space Station on 14 June 2019. Photo credit: National Aeronautics and Space Administration [5568x3712]
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πŸ‘€︎ u/trot-trot
πŸ“…︎ Apr 22 2020
🚨︎ report
"Five of six Expedition 59 crewmembers gather inside Russia's Zvezda service module for dinner as a pizza loaded with toppings floats above the galley" while orbiting Earth inside the International Space Station on 14 June 2019. Photo credit: National Aeronautics and Space Administration (NASA)
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πŸ‘€︎ u/trot-trot
πŸ“…︎ Apr 22 2020
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International Space Station: "A large selection of cameras and lenses are available to take Crew Earth Observations photos. These cameras are in the Services Module part of the Russian Segment and near one of the windows used for Earth photography." [4928 x 3280]
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πŸ‘€︎ u/trot-trot
πŸ“…︎ Nov 06 2018
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This is how the Moon orbits Earth. Using real data for the month of April 2020 Dr. James O'Donoghue showing the exact rotations, tilts, inclination, orbital velocity, sunlight angles & views of our Earth-Moon system. E-M distance not to scale, but E-M *size* (in middle) is. gfycat.com/commonelatedki…
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πŸ‘€︎ u/RTG-rohittugaya
πŸ“…︎ Apr 16 2020
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[Tutorial] Add a Line Renderer & Set the Prefab Rotation Reference - Gameobject Build System in Unity (VR) E05 youtube.com/watch?v=V8l1i…
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πŸ‘€︎ u/jay-media
πŸ“…︎ Mar 28 2020
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A day is 24 hours. Earth's rotation is 23. 56 and change. Where do those 4 minutes go? And why isn't the time scale divided so it's 24 hours exactly?
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πŸ‘€︎ u/Puppy-Zwolle
πŸ“…︎ Oct 13 2021
🚨︎ report
Estonia's Foreign Intelligence Service Details China's Growing Influence and Attack on the International System and Human Rights

The Estonian Foreign Intelligence Service just released their annual report on international security and Estonia, which contains an insightful chapter on China (pages 70-78). The report is very straight forward in its assessment on the actions of the Chinese government and contains a number of important points.

Some quotes from the chapter:

"China's broader goal is to impose its worldview and standards, and through that build a Beijing-led international environment."

"China is attempting to reformulate the Western concept of human rights, which it reduces solely to the right to economic prosperity and a safe living environment."

"It is important to understand that, in the eyes of the CPC, decision-makers in other countries are only useful pawns to help implement CPC strategies."

"China has recently begun to export its vision more vigorously, harnessing its foreign missions. Since spring 2018, many Western countries have witnessed unprecedented levels of activity by Chinese missions, and this trend continued in 2019."

"Chinese foreign missions endorsed violence."

"The New Silk Road (#BRI), envisages strengthening #China’s power by establishing trade infrastructure in Asia & Africa, but also in Europe & South America. It is part of China’s strategy to become a global superpower that controls strategic trade channels and logistic nodes."

"Chinese investments aim to gain a lever for steering other countries’ policies in a suitable direction. Foreign investment is used to create dependency. It is a distinct possibility that China will use its close trade ties as a weapon when international relations deteriorate."

"The threat of Chinese technology is strategic and will be revealed in the long term. As one aspect of building its global influence, China creates dependencies in other countries step by step, over the long term."

It is rare to see such a blunt assessment of China's actions internationally from a national agency, the whole chapter is worth a read:

https://www.valisluureamet.ee/pdf/raport-2020-en.pdf

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πŸ‘€︎ u/Like10Bears
πŸ“…︎ Feb 18 2020
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An ocean gyre is a large system of circular ocean currents formed by global wind patterns and forces created by Earth’s rotation. The movement of the world’s major ocean gyres helps drive the β€œocean conveyor belt.” The ocean conveyor belt circulates ocean water around the entire planet. nationalgeographic.org/en…
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πŸ‘€︎ u/Alantha
πŸ“…︎ May 30 2016
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How do scientists capture a particular spot in the sky for 4 months and produce crisp and clear photos? Wouldn't the rotation of the Earth make it hard?
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πŸ‘€︎ u/nothorny911
πŸ“…︎ Nov 12 2021
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[WP] The International Star Registry is legally binding and grants you ownersip of the star and all planets in that solar system. When Earth invents interstellar travel, you visit the star your weird uncle bought for you only to learn you're Emporer of an interplanetary civilization.
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πŸ‘€︎ u/NickE85
πŸ“…︎ Apr 15 2018
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[JonMorosi] Trade market note: The #Marlins have three starters in the 3+ service time class β€” AlcΓ‘ntara, LΓ³pez, HernΓ‘ndez β€” and sources say the team is considering whether to trade one in order to clear a rotation spot for the next young starter in 2022 twitter.com/jonmorosi/sta…
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πŸ‘€︎ u/brandon_the_bald
πŸ“…︎ Nov 09 2021
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If we add up the earth's rotation, its orbit, any movement of our solar system and movement of our galaxy, how fast sre we really travelling when we are sitting still?
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πŸ‘€︎ u/TomasTTEngin
πŸ“…︎ Jun 19 2014
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If I stop and think about Earth's rotation, and revolution around the Sun, and the system's movement in the galaxy, I swear I can feel the inertia just a bit.
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πŸ‘€︎ u/91Bolt
πŸ“…︎ Sep 30 2016
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If you were in charge of creating a new system of Measurement for time and date, one that doesn't exist as of yet and does not reflect the earths rotation around the sun, what would it be?

please be detailed, and post well thought answers.

>An example of use would be if humanity became an interstellar race. Though this doesn't have to be necessarily the only means of a need. The idea rose from a conversation on the flaws of the Gregorian calendar.

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πŸ‘€︎ u/Esphydion
πŸ“…︎ Feb 11 2013
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There’s an estimated 200k to 500k amateur astronomers in the US alone who can accurately and predictively analyse the solar system with the globe earth model as reference. Wouldn’t one of these person come forward after realise this is all a lie? Are they in the conspiracy too? quora.com/How-many-amateu…
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πŸ‘€︎ u/ShadyToad
πŸ“…︎ Dec 20 2017
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Animation of how the Moon orbits the Earth (using real data for April 2020), showing the exact rotations, tilts, inclination, orbital velocity, sunlight angles & views of the Earth-Moon system. The distance is not to scale but Earth-Moon size in the middle animation is. Copyright @physicsj Twitter v.redd.it/ukn48uuqbjv41
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πŸ‘€︎ u/Honeybadger-0-
πŸ“…︎ Apr 28 2020
🚨︎ report
Animation of how the Moon orbits the Earth (using real data for April 2020), showing the exact rotations, tilts, inclination, orbital velocity, sunlight angles & views of the Earth-Moon system. The distance is not to scale but Earth-Moon size in the middle animation is. Copyright @physicsj Twitter v.redd.it/ukn48uuqbjv41
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πŸ‘€︎ u/Honeybadger-0-
πŸ“…︎ Apr 28 2020
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Schneider submarine mine, showing here in a 1913 patent. Loaded with 65 kilos of guncotton, it was trialed in 1914 by the French Marine and was meant to be carried in batches of twenty ; instead of using horns, the mine's detonation system relied on a sudden rotation to activate the mechanism reddit.com/gallery/qo7olz
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πŸ‘€︎ u/762x38mmR
πŸ“…︎ Nov 06 2021
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TIL Movement of tides causes a loss of mechanical energy in the Earth–Moon system. During the last 620 million years the period of rotation of the earth (length of a day) has increased from 21.9 hours to 24 hours. en.wikipedia.org/wiki/Tid…
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πŸ‘€︎ u/Wakaxojy
πŸ“…︎ Sep 24 2018
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Direct demonstration of Earth's rotation by diamagnetically levitatated ball-gyroscope. This slices right through the complexity of Foucault's pendulum and other such contraptitudinosities: it has *all* its degrees of freedom, so its spin *just* keeps to the same axis - simples! mctoon27.files.wordpress.…
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πŸ‘€︎ u/Estrella_Stella
πŸ“…︎ Oct 28 2021
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TIL that because the position of Mecca changes dramatically due to the Earth's rotation from the International Space Station, Muslim astronauts have special guidelines when praying during salah. newscientist.com/article/…
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πŸ‘€︎ u/gwippold
πŸ“…︎ Jun 16 2013
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Once we colonize mars, we will need a whole new literally UNIVERSAL system to count time, which is independent from earths rotation around the sun
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πŸ‘€︎ u/GNL_Breakdown
πŸ“…︎ Dec 28 2017
🚨︎ report
Here are 190 photos of the aurora stacked to create star trails. This shows the rotation of the earth. The star close to the celestial pole, in the center of the circles, is Polaris and is often referred to as the north star. [OC]
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πŸ‘€︎ u/DerekMellott
πŸ“…︎ May 13 2019
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Make a time system and clock based on degrees, with 360Β° in a day corresponding to the earth’s rotation.

So there would be 360Β° in a day. If you think about it, this was essentially the driving principle behind sundials; measure the degrees a shadow moved around a circle throughout the day. So our current clock already is using β€˜degrees’ in a sense, but with 24 large ones instead of 360 normal-sized degrees.

Each degree would be the equivalent of 4 minutes, and each arcminute would be 4 current-system seconds. An arcsecond would be about 67 milliseconds. Conveniently enough, the earth rotates 1Β° every 4 minutes, which I assume is not a coincidence. While we’re completely changing how we count time, we might as well correct for the fact that a day is actually about 23 hours, 56 minutes, and 4.1 seconds. A degree would then technically be ~3.989 current-system minutes

Obviously radians would work as well, but it’s slight more inconvenient to say β€œI’ll be there in 0.0349rad” than β€œI’m running 2 degrees late”. I suppose we could use milliradians and say 35mrad. Then we don't have to deal with the 360Β°/60β€²/60β€³ nonsense.

TL;DR: Since our clock is based on degrees anyway, we should go the full mile and make the degrees 1/360th of a circle instead of 1/24th.

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πŸ‘€︎ u/non_clever_name
πŸ“…︎ Jun 16 2014
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TIL ISERV -- ISS SERVIR Environmental Research and Visualization System -- "automatically takes images of Earth through a small telescope with an off-the-shelf digital camera mounted in the International Space Station's Destiny module." ISERV "captures 3 images per second" when running. nasa.gov/mission_pages/st…
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πŸ‘€︎ u/trot-trot
πŸ“…︎ Aug 30 2019
🚨︎ report
International Space Station: "A large selection of cameras and lenses are available to take Crew Earth Observations photos. These cameras are in the Services Module part of the Russian Segment and near one of the windows used for Earth photography."
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πŸ‘€︎ u/trot-trot
πŸ“…︎ Nov 06 2018
🚨︎ report
RazAlGhould has reached the point where he simply makes fun and mocks the expertise of Hebrew scholars ... who have all agreed 'ends of the earth' is a geographic reference (not time as Felix Manalo claimed)
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πŸ‘€︎ u/Rauffenburg
πŸ“…︎ Nov 04 2021
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