MinutePhysics
The Man Who Corrected Einstein
This video is about how Russian physicist Aleksandr Fridman corrected Albert Einstein about the expansion of the universe. Einstein thought that general relativity implied that space had to be static and unchanging, but he had made a...
SciShow
How Many Galaxies Are There?
We've been trying to count the galaxies in the universe since the mid '90s, but our estimates change as our tools improve. So what does our current estimate really mean?
TED-Ed
TED-ED: The death of the universe - Ren_e Hlozek
The shape, contents and future of the universe are all intricately related. We know that it's mostly flat; we know that it's made up of baryonic matter (like stars and planets), but mostly dark matter and dark energy; and we know that...
Be Smart
Why Is The Universe So Empty? (ft. PHD Comics!)
Why is the universe organized the way it is? And why is it so empty? From planets and stars to superclusters and galactic filaments, the universe's largest structures formed because of its smallest. In this special collaboration with PHD...
PBS
What Does Dark Energy Really Do?
How does dark energy affect the universe's expansion? Measuring past expansion history should tell us the future expansion without ever having to count any galaxies. To measure this we need to measure the redshift-distance relationship,...
SciShow
The Supernova of 1054, Our Very Special Guest Star
All of humanity likely saw it, a brilliant supernova that lit up the daytime sky in 1054. But 960 years later, there’s still a lot we dont quite understand about the famous celestial phenomenon.
SciShow
Why Is the Night Sky Dark?
If the universe is so vast and full of stars, why is the night sky dark?
TED-Ed
TED-ED: What light can teach us about the universe - Pete Edwards
Humanity has long been looking at the universe and asking the big questions: How did it begin? How will it end? Cosmologists are searching hard for the answers, but where do they even start? The answer is light. Pete Edwards outlines the...
SciShow
The Biggest-Ever Supernova
NASA has chosen three companies whose craft it will use to ship cargo to the ISS and we've got new details about the brightest supernova we've ever observed.
SciShow
Where Did the Big Bang Happen?
The name “The Big Bang” makes it sound like there was a big explosion in one particular spot, but if that’s the case, where did it happen?
PBS
How Do You Measure the Size of the Universe?
The universe is HUGE. But, there is only so much of the universe we can ACTUALLY see, and if we wanted to measure that FINITE space, how would we do it? A gigantic ruler? One really long car ride? Or maybe it's something even more...
SciShow
How Big Is the Universe?
We all know that the universe is mind-bogglingly gigantic, but how *exactly* mind-bogglingly gigantic is it? Let Hank fill you in on the details that scientists have worked out!
SciShow
Is the Universe Expanding?
Is the universe expanding? About a hundred years ago astronomers made a discovery that helped us unravel the mystery of the history of the universe!
Crash Course
The Big Bang, Cosmology part 1
Thanks to observations of galaxy redshifts, we can tell that the universe is EXPANDING! Knowing that the universe is expanding and how quickly its expanding also allows us to run the clock backwards 14 billion years to the way the...
SciShow
Spotted The First Inside-Out Planetary Nebula - SciShow News
An inside out planetary nebula has given astronomers insight into what might happen in our own solar system someday, and it's that time of year again to search for shooting stars.
Curated Video
Eternal Inflation: A Leading Theory Behind the Multiverse
New ReviewSummary: The big bang model has some problems - homogeneity, flatness, and lack of magnetic monopoles. Cosmic Inflation occurred when the entire universe shortly after its beginning, expanded exponentially fast for a fraction of a...
Wonderscape
Title: Vera Rubin: Uncovering the Mystery of Dark Matter
Science Kids Famous Astronomers and Astrophysicists - From Galileo to Neil deGrasse Tyson Vera Rubin was a pioneering astronomer who defied gender discrimination to make groundbreaking discoveries in the field of astrophysics. Her work...
Curated Video
US: China Has More Than 600 Operational Nuclear Warheads
The United States has said that China's military power is growing at a pretty unprecedented rate. The Pentagon's annual report has said that Beijing is making its most ambitious move yet: a massive expansion of its nuclear arsenal. This...
Curated Video
Expanding with Logs
In this video, we use the properties of logarithms to expand expressions.
Curated Video
Expanding Sentences {Sentence Writing}
In this video, we explore how to expand sentences effectively—a crucial step in building strong writing skills for students of all ages. Whether you're a classroom teacher or homeschool parent this video will give you practical...
Makematic
The Treaty of Guadalupe Hidalgo
The Treaty of Guadalupe Hidalgo in 1848 transferred 55% of Mexican territory to the U.S., and ignited a fierce debate over slavery in these new lands.
The Business Professor
Internationalization Strategy
By definition, an international strategy is a strategy through which the firm sells its goods or services outside its domestic market.
Astrum
What Can the James Webb Space Telescope Actually Do?
Everything you could want to know about the James Webb Space Telescope.