SciShow
The Cosmic Ladder That Lets Us Map the Universe
Considering how massive our universe is, we know the distances to cosmic objects surprisingly well. What tools and clues do scientists use to measure distances that are so enormous they sound like made-up numbers?
SciShow
Great Minds: Tycho Brahe, the Astronomer With a Pet Elk
In the late 16th century, Tycho Brahe built an observatory on an island and collecting some of the most accurate data ever. He also lost his nose in a duel with a classmate -- over who was the better mathematician.
SciShow
How Do We Measure the Distance of Stars?
It's School of YouTube Week! Comic Relief and YouTube are partnering to send students to school! The Bad Astronomer Phil Plait teaches Hank how to measure the distance to the stars.
Crash Course
Distances
How do astronomers make sense out of the vastness of space? How do they study things so far away? Today Phil talks about distances, going back to early astronomy. Ancient Greeks were able to find the size of the Earth, and from that the...
Curated Video
Perspective: Parallax
Discover how parallax can be used to measure distances, and how early astronomers used it to find the distance of stars from Earth. Maths - Space A Twig Math Film. Reinforce and extend the learning required by the curriculum. Twig’s math...
Flipping Physics
Dropping a Ball from 2.0 Meters - An Introductory Free-Fall Acceleration Problem
In this introductory free-fall acceleration problem we analyze a video of a medicine ball being dropped to determine the final velocity and the time in free-fall. Included are three common mistakes students make. "Why include mistakes?"...
Physics Girl
How 3D holograms work
Holograms are photographic recordings of 3D scenes. Unlike a camera, which captures one view through a small viewer focused by a lens, holograms capture an entire light field which allows them to recreate the 3D scene. Shimmery 2D...
Next Animation Studio
New systems for glasses-free 3D movie theater technology
Technology that could one day result in glasses-free 3D movies at theaters is being developed by researchers at Seoul National University. Two different techniques, one using a parallax barrier and the other using a pinhole array, are...
Curated Video
Creating Parallax Effects in PowerPoint
This tutorial demonstrates how to create a popular parallax effect in Microsoft PowerPoint, where content and background images move at different speeds to create a sense of depth and immersion. Using simple steps like cropping images,...
Astrum
How is it possible to measure the distance to stars and galaxies?
We can't use tape measures, rulers or lasers to measure the astronomical distances to stars and galaxies, so how do we do it?
Professor Dave Explains
History of Astornomy Part 3: Copernicus and Heliocentrism
Once it was determined that the Earth is round, the next step was to decipher the geometry of the solar system. Does everything rotate around the Earth, like in the geocentric model of Ptolemy? We thought so for thousands of years, but...
Getty Images
HD - Cinemagraph NYC Court House Stairs with White Collar On the Go
HD - Cinemagraph NYC Court House Stairs with White Collar On the Go
Getty Images
HD - Cinemagraph NYC Court House Stairs with White Collar On the Go
HD - Cinemagraph NYC Court House Stairs with White Collar On the Go
Getty Images
HD - Cinemagraph NYC Court House Stairs with White Collar On the Go
HD - Cinemagraph NYC Court House Stairs with White Collar On the Go
Getty Images
Parallax shot of residential neighborhood in Los Angeles County.
Parallax shot of residential neighborhood in Los Angeles County.
Getty Images
Parallax aerial shot of the City of Los Angeles.
Parallax aerial shot of the City of Los Angeles.
Getty Images
HD- Cinemagraph Istanbul Romantic Couple River View Parallax
HD- Cinemagraph Istanbul Romantic Couple River View Parallax
Getty Images
Businessman using computer shopping online,Dolly shot
Businessman using computer shopping online,Dolly shot 4K
Getty Images
London Street Cinemagraph Parallax St Paul Jogger
London Street Cinemagraph Parallax St Paul Jogger