Flat, positively curved, or negatively curved ... what is the true shape of the universe? Scientists use many indirect measurements to base their theories on the shape of the universe. Using an installment from the SciShow Space series,...

Could there really be over 200 billion galaxies? It turns out the number may be closer to two trillion galaxies! A video presentation discusses the existence of galaxies in the universe. The narrator explains how scientists make...

From supernova to neutron star ... what's next? A video presentation describes a neutron star and its life in the universe. Learners then answer questions online to asses their understanding.

Understanding the size of the universe and its many galaxies challenges perceptions, and this visual journey through the universe helps create a scale. Starting from Earth and going out past our galaxy, thus backwards in time, the entire...

Biology, cosmology, philosophy ... Plato and Aristotle had theories about them all! How did these ancient scholars shape the science of today? The third video in the History of Science series compares and contrasts the ideas of the famed...

The nesting dolls of stars have been discovered! Although scientists believed it to be true, only recently have they located a star with a core of another star. The episode of a comprehensive solar system series describes how...

Prepare to be amazed! Look deep into the darkest part of the night sky, courtesy of a video from a vast physics playlist. Young astronomers see hundreds of galaxies through the eye of the Hubble Telescope. 

If you can't see something, how do you know it's there? Welcome to the mystery of dark matter! Curious cosmologists explore one of physics' longest-running quandaries through an interesting video. Content includes who first proposed the...

How can something as vast as the universe also be flat? Go beyond the Big Bang Theory using a video from an expansive physics playlist. Topics include the expansion and inflation of the universe, why opposite sides of the universe are...

They may be small, but probably still mighty! The characteristics of what astronomers have defined as stars have a minimum size requirement. The tiniest stars pack a lot into a small package—and still have all the properties of their...

Is it a bird, or a plane, or a blinking star? Scientists discovered in 1967 what they later determined to be a pulsing star. An episode of a larger solar system playlist discusses the chemistry behind the existence of this type of star.

There's something to look forward to in 2021 or 2022! Although the actual event occurred almost 2,000 years ago, the appearance of a new star will become evident from Earth in a few short years. The video instructor from the solar...

A video lesson attempts to explain the unexplainable. The video instructor focuses on three unique stars that have characteristics that astronomers have difficulty explaining. The installment of a solar system playlist includes a heavy,...

They should exist ... but do they really? Scientists use what they know to predict what should and should not exist. An installment of a larger solar system series looks at the scientific prediction of different stars that have yet to be...

Many phenomena in space are yet beyond scientific explanation. An episode of a video series on the solar system discusses two recent topics of interest: Uranus' magnetic field and hypervelocity stars. The presenter explains what we know...

The universe is littered with planets orbiting their suns. The video instructor outlines different methods scientists use to detect these exoplanets. As an installment of a larger solar system playlist, the video discusses current and...

Imagine a universe before the formation of stars. An installment of a solar system playlist takes scholars through time to discover the beginning of stars in the universe. The presenter discusses the elements present at the time and how...

Imagine living in a neighborhood where the houses on your street keep moving farther away until your house is the only one in the reachable vicinity. That's what is happening in our universe, except your house is our galaxy, and the...

Have we found the next Earth? Join the host of an interesting physics series as she learns what scientists know about the planets orbiting the star Trappist-1 during an engaging video. Astronomers discuss how they located the system,...

The truth about strange unexplained cosmic rays? They're still unexplained! Share one of our universe's many unsolved mysteries with your class using a video from the Physics Girl playlist. The resource describes what cosmic rays are,...

Can scientists take a picture of the universe before the planets formed? Using telescopes and new technology, scientists take more detailed photos every few years. Cosmic inflation challenges our understanding of the early universe.

Just when you thought you had this figured out! Engage young physicists in an interesting look at the nature of a universal constant with a video, part of a PBS playlist on space time and measurement....

Explore the structure of the universe! An educational video demonstrates the gravitational consequences of different astronomical structures. The presenter starts with the creation of the universe and explains how energy and forces...

A video highlights the contradictions in the Big Bang Theory and then discusses the need for a unifying theory of everything. Space Time presents an enlightening video as part of a larger series on Cosmology.