This video introduces the Sun and planets of the solar system. This video looks at galaxies ,identifies the location of the solar system in the Milky Way galaxy and discusses the role of nuclear fusion in the sun.

Learn the sizes and shapes of different Galaxies with this 3D Universe Size Comparisons video by KLT!

This video explains the formation of the universe as described by the Big Bang theory.

Cosmic Galaxies identifies all objects within a galaxy by describing a galaxy, including gas, dust, stars, and any object that orbits the stars, and identifies the Milky Way as our home galaxy.

Astrophysicist Scott Tremaine (Institute for Advanced Study) describes why we believe that dark matter exists.

Astrophysicist Scott Tremaine (Institute for Advanced Study) describes the intriguing relationship between galaxies and the enormous black holes at their cores.

University of Chicago cosmologist Rocky Kolb describes the history of dark matter: how it was overlooked by most physicists for decades together with current hypotheses of what it might be and experiments to determine which one is valid.

Astrophysicist Scott Tremaine, Institute for Advanced Study, describes how our understanding of black holes has evolved from a time when Einstein didn't actually believe they existed to our present view that so-called "supermassive"...

Learn about Universe Size Comparison with this facts about the universe video. Brought to you by KLT!

That's right. We never see anything as it happens. We only see the past.

Gravitational lensing occurs when a huge amount of matter, like a star, galaxy, or cluster of galaxies, creates a powerful gravitational field around it, strong enough to bend the light coming from distant galaxies (behind...

How did Hubble discover the expansion of the universe?

Never taken physics before? Want to learn the basics of physics? Need an AP Physics 1 review before the exam? This course is for you! In this class we will cover these topics: 1D Motion Free Fall 2D Motion Newton’s Laws Free Body...

Multiverse theory suggests that our universe, which consists of billions and billions of planets, stars and galaxies and extends out tens of billions of light-years, may not be the only universe that exists. There could be another...

Looking forward to the James Webb Space Telescope? Just wait until ESO's Extremely Large Telescope (ELT) is completed.

Upon viewing the Stars and Galaxies video series, students will be able to do the following: Explain that our solar system is part of the Milky Way galaxy. Understand that the Milky Way galaxy is huge and contains billions of stars....

We've learned a lot about stars! We know how they form, and we know that most of them exist in galaxies. But how are they arranged within galaxies? And are there different types of galaxies or are they all the same? There is a lot to...

The video explores various theories proposed by scientists about the future of the universe. It explains the Big Bang theory, which suggests that the universe began from a very small and dense region and has been expanding ever since. It...

This is a lecture presentation on stars and galaxies. The presenter starts by describing the general structure of our solar system and the Milky Way, which is one of the billions of galaxies in the universe. They explain how astronomical...

Dark matter is an invisible matter that occupies more than half of the space of the observable universe but cannot be detected directly as it doesn’t interact with electromagnetic radiation, like visible light and gamma rays. One of the...

Upon viewing the Stars and Galaxies video series, students will be able to do the following: Explain that our solar system is part of the Milky Way galaxy. Understand that the Milky Way galaxy is huge and contains billions of stars....

Astronomers say they caught a glimpse of the biggest explosion in the cosmos ever observed by X-ray and radio telescopes. <br/>

How is it possible for galaxies and objects in space to move away from us faster than the speed of light? Will we ever see those objects?

The video discusses two theories that try to explain the expansion and evolution of the universe - the steady state theory and the Big Bang theory. The video covers the concept of redshift of light exhibited by galaxies moving away from...