What kinds of tools do astronomers use to calculate the age of the universe, and how can they determine the speed of its expansion?

Alcubierre warp drive - faster than light travel? Is Warp speed possible? Enterprise from Star Trek can go 9000 times the speed of light. By comparison, the fastest manmade object, the Juno probe goes 0.0002 times...

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...

Hank tells the story of the mysterious star known as "Methuseleh," and why scientists think that it is the oldest known star in the universe.

Explore the physics of a double-star system: calculate the angular speed of two orbiting stars and determine the minimum escape speed a meteoroid needs to flee the gravitational pull from the center of mass.

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...

Learn how to eliminate star trails in this quick astrophotography tutorial. In this video I cover the "500 Rule" and "NPF Rule," two ways to eliminate star trailing that can creep up in your photos. Link to spreadsheet with pixel...

Is the universe infinite? Visualizing infinity. This is part 2 of the Planck length video. if the Sun was the size of a Basketball, Proxima Centauri our nearest neighbor would be 4500 hundred miles away. And...

We've learned about the lifetime of stars, and we saw that very high mass stars will leave behind a black hole when they die. What else can we say about black holes? Is there any other way to make a black hole besides waiting for a huge...

This video is about the Schwarzschild radius of a black hole, (its "event horizon"), and how much mass and density is required to reach the point of no return where an object like a star, neutron star, red giant, etc...

Learn how astrophysicists use the orbital motion of a visible star—its speed and period—to infer the mass of its invisible companion, often a black hole, in a binary system.

In a recent paper published by Applied Physics, authors Alexey Bobrick and Gianni Martire, outline how a physically feasible warp drive could in principle, work, without the need for negative energy. I spoke to them....

Certain mathematical equations contain unnerving dangers, Arguably, E=mc^2 is the most famous equation in science. C is a very large number. But in Einstein’s, equation it is squared. This means that mass contains an insane...

The prospect of interstellar travel is no longer sci-fi. It COULD be achievable within our lifetime! But, how would an interstellar rocket-ship work? On this week's episode of Space Time, Matt talks options for interstellar travel - from...

Dark Matter may be detected via Exoplanets. All the matter that is visible to us constitutes only about 18% of the total matter that we think actually exists in the universe. We know this because when all the known mass of...

Is it possible that what we have invented as dark matter to explain the motion of stars in galaxies and clusters is a figment of our imagination? Could it be that Einstein’s General Relativity has a flaw? Does...

Nearly 10 billion years ago, the black hole at the center of a distant galaxy produced a powerful outburst, and light from this blast began arriving at Earth in 2012. Astronomers using data from NASA's Fermi Gamma-ray Space...

Python is the becoming the language of choice for pretty much every arena. It is a very simple yet extremely powerful programming language. It is a scripting language that is widely used for prototyping to get work up and running...

It's entirely possible to measure the distance to the moon using regular everyday cameras. Observers stationed a long distance apart can work in pairs to take images of the moon and surrounding stars. These photos will show slight...