635 light-years from where you are sitting, way out in outer space, lies a planet. The first planet to be discovered inside the habitable zone of a Sun-like star. Its name is Kepler 22-b. Watch the full episode here: https://youtu.be/3a48xkXT9p0

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What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure through time, space and chance while we (hopefully) boil down complex subjects in a fun and entertaining way.

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#shorts #whatif #cosmos #space #nasa #spacex #exoplanet

Scientists Discover Planets More Habitable Than Earth
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Just about 30 years ago, we didn’t have any scientific proof of a planet outside our solar system. Today, thanks to advances in technology and scientific research, we've discovered over 5,300 exoplanets - alien worlds that are out there waiting to be explored.

At first, these discoveries mostly involved large gas giants, but as our capabilities have expanded, we've started to uncover smaller, Earth-like exoplanets. Scientists have already found more than 50 exoplanets with masses similar to Earth, and over 800 worlds with radius less than one half times that of Earth.

We don’t know of many such planets orbiting in the habitable zone of their parent stars - where the conditions are just right to support life. But that's already starting to change.

As our search for habitable planets continues, we're beginning to discover entire planetary systems with more than one potentially habitable world. And we already know about at least one such system in our cosmic neighborhood.

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Its name is K2-18 b, also known as...wait for it... EPIC 201912552 b.
It is an exoplanet orbiting a red dwarf star, located about 111 light-years from Earth.
If you were able to reach half of the speed of light and travel at that constant speed, you will take about 222 years to get to K2-18b. And we don't even know how to reach that huge speed. So I guess you and I will never go for a trip to K2-18b planet.

Not only earth-based telescope is being used to catch exoplanets.
In fact, we make large use of some space telescopes, such as the famous Kepler Space Telescope.
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We are living in the Age of Exoplanets!
A lot of Astrophysicists and Physicians, as well as Biologists, are currently involved in projects which try to understand whether in the universe exists other forms of life as we know it, or not.
That's why we search for exoplanets, hoping one day we'll find a habitable one, just like ours, the Earth.
As we've said, the planet was discovered through the Kepler space telescope, using the transit method.
What scientists found is that it has about eight times the mass of Earth and it completes an orbit around its host star in about 33 days (it means that if we lived on that planet, our year would last 33 solar days!).
It is also in the so-called Habitable zone of the planet, which is what makes it a potential candidate for life as we know it.
But is it enough to be In the habitable zone in order to host life as we know it?
Well, things are harder than that.
First, we should search for some clues about water. Is there water on K2 18 b?

With the help of the telescopes Kepler, Hubble and Spitzer (which works in the infrared range of the electromagnetic spectrum), two independent research studies found that there are significant amounts of water vapour in K2 18 b's atmosphere.
This was a groundbreaking discovery because it was the first time we had clues of water within the habitable zone of a star.

But is the presence of water the only requirement in order to host life as we know it?
Of course, it is not. Some other factors play a big role in this game. 
For example, let's talk about K2 18 b size and let's see what we can say about the presence (or not) of life. 
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#InsaneCuriosity #K218b #exoplanets

1,000 years from now, the length of a solar day on Earth will increase by 1/30 of a second. Leap seconds will have to be added multiple times during the month.

30,000 years from now, Niagara Falls will have eroded the remaining 32 km to Lake Erie and will cease to exist.

100,000 years from now, the proper motion of stars across the celestial sphere, which results from their movement through the Milky Way, renders many of the constellations unrecognizable.

500,000 years from now, Earth will likely have been hit by an asteroid of roughly 1 km in diameter, assuming that it cannot be averted.

1 million years from now, Betelgeuse will have exploded in a supernova, making it visible on Earth in daylight.

50 million years from now is the earliest estimated time for Earth to naturally replenish its fossil fuel reserves.

180 million from now, due to the gradual slowing down of Earth's rotation, a day on Earth will be one hour longer than it is today.

250 million years from now, the west coast of North America, the coast of California will collide with Alaska.

1.2 billion years from now is the high estimate until all plant life dies out.

2 billion years from now is the first close passage of the Andromeda Galaxy and our Milky Way galaxy.

5.4 billion years from now, the sun begins to evolve into a red giant, engulfing the Earth and moon.

150 billion years from now, the Universe's expansion causes all galaxies beyond the former Milky Way's Local Group to disappear beyond the cosmic light horizon, removing them from the observable universe.

1 trillion years from now, star formation ends in galaxies as galaxies are depleted of the gas clouds they need to form stars.

120 trillion years from now, stars in the universe will have exhausted their fuel.

In One gazillion, quadrillion, trillion, billion, million, thousand years from now - we start all over again.

#astronomy​​​ #astrophotography​​​

Today we're looking at the Kalinin K-12, an experimental tailless bomber. Its future was cut short when Konstantin Kalinin, its designer, met his untimely end. Though the experimental bomber was somewhat unstable and not large enough to be practical, it did at least prove that the concept of large tailless aircraft could work.

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Producing these videos is a hobby of mine - and apparently its now a full-time job too! I have a passion for history, and personally own a large collection of books, journals and other texts, and endeavor to do as much research as possible. However if there are any mistakes, please don't hesitate to reach out and correct anything :)

Sources:
Rose.B (2010). Secret Projects - Flying Wings and Tailles Aircraft
Flying Review International. Vol 22 # 5 (Jan 1967)

View full lesson: http://ed.ted.com/lessons/a-br....ief-history-of-numer

1, 2, 3, 4, 5, 6, 7, 8, 9... and 0. With just these ten symbols, we can write any rational number imaginable. But why these particular symbols? Why ten of them? And why do we arrange them the way we do? Alessandra King gives a brief history of numerical systems.

Lesson by Alessandra King, animation by Zedem Media.

"History of Russia in 100 Minutes" is a crash course for beginners. Here you will find the complete history summarized and retold in simple language with accurate dates, the most relevant names and essential concepts. After finishing the course, you will know:

- The basic characteristics of Russian history in different epochs
- The 54 most important rulers and 106 historical persons in Russian history
- 126 key dates and events in Russian history
- The basic terms and concepts of Russian history

The text is accompanied by numerous online resources:
- 20,000 pictures
- 700 videos
- 3,500 songs
- 100 podcast episodes

All that is available via the smarthistories.com website.


http://smarthistories.com/


Narrated by: Sammi Bold
Written by: Tanel Vahisalu
Edited by: Madis Maasing and Kerry Kubilius
Proofread by: Tony Burnett
Graphic Art by: Mehak Zaib Suddle

Video:
“Rise of Catherine the Great” by Paul Czinner, Alexander Korda (1934)

Music:
"Tchaikovsky (Part II)" and "Crocodile Ghena's Song" (1995) by J.M.K.E.
https://www.discogs.com/JMKE-Sputniks...

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CATHERINE THE GREAT

The reign of Catherine II (Catherine the Great) is known to history as the “Age of Enlightened Absolutism,” in Russia. A whole generation of people grew up enjoying freedom of speech, political stability, and great victories.

BACKGROUND
After the death of Elizabeth, her nephew, Peter III, from Northern Germany ruled disastrously. His wife, Sophie Friederike Auguste, was a pretty German princess who had been invited to Russia while still very young. She converted to Orthodoxy, learned the Russian language, and took the name Catherine. In 1762, she launched a coup against her husband and became the Empress of Russia, known as Catherine the Great.

ENLIGHTENED MONARCH
Catherine continued Peter the Great’s line of modernization, and she strongly supported education and culture. She prepared drafted laws based on the views of the Enlightenment, but the greater part of her ambitious plans, including the abolition of serfdom, led nowhere.

PATRON OF NOBILITY
The great Administration Reform of 1775 increased the administrative power of the nobility. Courts and police institutions were established. The reform significantly increased the effectiveness of local government in Russia.

FOREIGN POLICY
In the beginning, Catherine’s foreign policy was in the hands of Nikita Panin. The commanders Alexander Suvorov, Fyodor Ushakov, and Grigory Potemkin, greatly expanded Russia’s territory in the south and west. In 1784, Crimea was taken from the Ottomans, and the three partitions, formed in 1772, 1793 and 1795, respectively, completely wiped Poland off the map.

PUGACHEV'S REBELLION
Catherine supported the Enlightenment only to a certain extent. She denounced the French Revolution as a brutal act against monarchy.

Although Catherine tried to improve the situation of Russian peasants, these attempts were mostly futile and caused unrest. In 1773, the greatest armed revolt in Russia, constituting 100,000 Cossacks, led by Yemelyan Pugachev, who claimed that he was actually Peter III, was put down ruthlessly. Pugachev was publicly executed.

Just a quick tutorial showing you how to use the menu to find your daily assignments. The page sometimes does not get pushed to the next day's assignments therefore you need to manually go click on the day that works for you. Hope this helps, Jackie, fellow discovery K12 parent.

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Three youths describe their experiences using Spice, also known as synthetic marijuana.

As the Germans advanced towards Stalingrad in the Summer of 1942, the war came to the locals of the city and evacuation was slow to the speed of the Wehrmacht’s advancement.

Because the city bore Stalin’s name it was of a high importance for the morale of the Soviet forces to hold it.

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Credit:

Narrator:

Chris Kane
www.ckvox.com

Artwork:

Daniel turner

Direction, Animation:
Daniel Turner

Research:

Oleg Guimaoutdinov

Music:

Video Game Soldiers by Twin Musicom is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/)
Source: http://www.twinmusicom.org/son....g/295/video-game-sol
Artist: http://www.twinmusicom.org

Full On by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/r....oyalty-free/index.ht
Artist: http://incompetech.com/

Devastation and Revenge by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/)
Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100694
Artist: http://incompetech.com/

Pictures: Wikimedia Commons (Public Domain)

History of sces.seminole.k12.ga.us
website (2001-2020) So Like and Subscribe
So wow.

Discovery K12 online homeschool offers curriculum for pre-k to twelfth grade with over 100 courses, 16,000 assignments, quizzes and tests, and an optional Parent/Teacher Account that provides curriculum, assessment, and reporting tools.

Curriculum by grade: http://discoveryk12.com/dk12/curriculum

How it works: http://discoveryk12.com/dk12/how-it-works

Student account that include all curriculum are free.

Use it part time, full time, or as a supplement to any current K12 education.

Hello everyone, and welcome back. 👋

In this video, I'll give you my thoughts on the CZ Shadow 2! I'll walk you through, the key features, and my thoughts on the pros and cons of CZ Shadow 2.

Please let me know in the comments what's your favorite CZ pistol.👇

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Hope you enjoyed my CZ Shadow 2.. What NO ONE is telling you! Video.

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Disclaimer: This video is for educational and fun purposes only.

#pistol #handgun #cz #9mm #firearms #gun

Originally intended as a temporary installation, the Eiffel Tower has become one of the most enduring symbols of France and the industrial age. #DeconstructingHistory
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HISTORY Topical Video

HISTORY®, now reaching more than 98 million homes, is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, epic miniseries, and scripted event programming. Visit them at HISTORY.com for more info.

In which John Green teaches you about Imperialism. In the late 19th century, the great powers of Europe were running around the world obtaining colonial possessions, especially in Africa and Asia. The United States, which as a young country was especially susceptible to peer pressure, followed along and snapped up some colonies of its own. The US saw that Spain's hold on its empire was weak, and like some kind of expansionist predator, it jumped into the Cuban War for Independence and turned it into the Spanish-Cuban-Phillipino-American War, which usually just gets called the Spanish-American War. John will tell you how America turned this war into colonial possessions like Puerto Rico, The Philippines, and almost even got to keep Cuba. The US was busy in the Pacific as well, wresting control of Hawaii from the Hawaiians. All this and more in a globe-trotting, oppressing episode of Crash Course US History.

Hey teachers and students - Check out CommonLit's free collection of reading passages and curriculum resources to learn more about the events of this episode. As America transitioned from the 19th to the 20th century, it experimented with imperialism through war and annexation; one of the most lasting effects of this time was the annexation of Hawaii, America's 50th state: https://www.commonlit.org/text....s/the-1897-petition-
America’s imperial aims continued for decades, particularly with the Monroe Doctrine: https://www.commonlit.org/text....s/the-monroe-doctrin

Chapters:
Introduction 00:00
New Imperialism 0:39
Economic Motivations for American Imperialism 1:52
The Panama Canal 3:00
Rising Nationalism: The Pledge of Allegiance & Flag Day 3:46
American Territorial Expansion 4:04
Imperialism in the Pacific 4:59
The Spanish-American-Cuban-Filipino War 5:47
Mystery Document 6:29
America Declares War 7:33
The Events of the Spanish-American-Cuban-Filipino War 8:23
American Territories Gained in the War 9:25
American Troops in China & The Philippines 10:03
The Philippine War 10:28
Puerto Rico, The Philippines, & The Foraker Act 11:05
Hawaiian Statehood 11:45
Anti-Imperialism 11:56
Supporters of Imperialism 12:24
Credits 13:30
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A teaser of Donna DesRoches and Carlene Walter's upcoming learning opportunity for teacher-librarians.

Learn more about the Battle of Guadalcanal, the Allies' first major offensive - and a decisive victory - in the Pacific theater during World War II. #TheWorldWars
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Battle 360
Episode 1

Chronicling the activities of the World War II carrier USS Enterprise, one of the most revered ships in U.S. naval history, from the Pearl Harbor attack to the last battle.

HISTORY®, now reaching more than 98 million homes, is the leading destination for award-winning original series and specials that connect viewers with history in an informative, immersive, and entertaining manner across all platforms. The network’s all-original programming slate features a roster of hit series, epic miniseries, and scripted event programming. Visit us at HISTORY.com for more info.

America grew from a colony to a superpower in 200 years.

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2:07 Correction: Cuba seceded from the US in 1902.

With over 800 military bases around the globe, the US is easily the most powerful nation on earth. But it wasn't always this way. The US once played an insignificant role in global affairs. In this 8-minute video, you can see the transformation.

Military budget data: https://www.nationalpriorities.....org/campaigns/milit

US foreign bases based on David Vine's book, "Base Nation" http://www.davidvine.net/base-nation.html

Troop numbers: "Total Military Personnel and Dependent End Strength By Service, Regional Area, and Country". Defense Manpower Data Center. November 7, 2016.

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