In which John teaches you about the Seven Years War, which may have lasted nine years. Or as many as 23. It was a very confusing was. The Seven Years War was a global war, fought on five continents, which is kind of a lot. John focuses...

Voyager 2 is the second object to leave our solar system, which means we now have twice as much information about its edges! And scientists have found a record-breaking black hole.

We’ve covered a lot of incredible stuff, but this week we’re talking about the weirdest objects in space: BLACK HOLES. Stellar mass black holes form when a very massive star dies, and its core collapses. The core has to be more than...

Active galaxies pour out lots of energy, due to their central supermassive black holes gobbling down matter. Galaxies tend not to be loners, but instead exist in smaller groups and larger clusters. Our Milky Way is part of the Local...

In this episode, we discuss the basic nature of gravity, one of the four fundamental forces in our universe.

Last week we talked about the orbits of the Earth and our Moon. But today we're going to go a little bigger... well, a lot better. Did you know that there is a massive Black Hole at the center of our Galaxy? Or that Pluto's orbit is...

Scientists have observed a collision of two of the universe's most extreme objects. And a mission to Jupiter's moon Europa makes an important step forward.

The Chandra X-ray Observatory has discovered a black hole growing at a record pace. Credit: NASA/CXC/A. Hobart

This video is answering the question of how many black holes are there in the galaxy.

Explore "How Are Black Holes Formed?" with our catchy video that makes learning about space fascinating and fun! Perfect for kids, this tune will spark your imagination and teach you the science behind the formation of these cosmic wonders.

In this video, observe a practical demo of configuring Root Guard to prevent unwanted root bridge elections.

Scientists have confirmed Albert Einstein's 100 year-old theory of gravitational waves, detected using a massive system of instruments called the Laser Interferometer Gravitational-wave Observatory (LIGO).

A brief description of what encyclopedias are used for and how to use them.

Stars represent a celestial battle of two opposing forces, gravity trying to collapse the star, and radiation pressure trying to explode the star. But it comes to an end close to the time that it runs out of fuel. Gravity...

What is inside a Black Hole? A black hole is really not a celestial body like a planet or a star. There is really no substance there other than a severely curved space-time. It’a a region in space where matter is...

Traveling forward in time is not a problem. You're doing that now. Can we travel backward in time? There is a theoretically possible way to do it using wormholes.



One solution to general relativity...

What if the universe is self-aware? Is there a cosmic superconsciousness? Could it be a giant brain? Is the universe a conscious mind? There is a short but lazy answer, and there is longer but more...

SUMMARY

Hawking Radiation DOES'NT Work the Way Hawking Explained it! Here's the Reality...Hawking Radiation: The Oversimplified Picture vs. The Reality...Hawking radiation suggested that black holes are not...

How will the universe end? Whether you think the universe is good, bad or indifferent, it will come to an end…someday. How will that happen? Will it simply die a slow death over time? Will it die dramatically in a big...

Time travel is nothing special. You’re time traveling right now into the future. Relativity theory shows higher gravity and higher speed can slow time down enough to allow you to potentially travel far into the...

AdS/CFT suggests that our three-dimensional universe can be perfectly modeled by a two-dimensional surface. On one side is AdS, or Anti-de Sitter space, which is a kind of imaginary universe with some unusual properties...

Hawking radiation,Black-Hole Evaporation and black hole explosions! Stephen Hawking theorized that a black hole may not be so black. He showed that when you apply the laws of quantum mechanics to classical physics,...

SUMMARY

Albert Einstein was ridiculed when he first published his theory. People thought it was too weird and radical to be real. Einstein wasn’t satisfied with his theory either, because the theory did not...

How the Planck scale is derived from the most important fundamental constants in physics. This is where our physics ends. If you wanted to simulate the universe in a computer, you would need to enter...