We learned a bit about general relativity and the curvature of spacetime, both earlier in this series, as well as in the modern physics course. But let's talk a bit more about the astronomical observations that corroborate this theory....

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?

How big do you think our solar system is? Up until Pluto? A bit beyond? How big can other solar systems get?

The video explores the mysteries of high energy astronomy, focusing on gamma ray bursts and their origins. It discusses the evolution of our understanding of the universe, from debates about the scale of the galaxy to the discovery of...

Time is Relative - The Twin Baby Experiment

With all the focus on the Coronavirus, it made me wonder how viruses would cope in space generally. This led on to other questions like "do we contaminate other worlds with Earth based life?" and "can alien bacteria and viruses thrive...

Olber's Paradox. With so many stars in the universe, why is space black and not white with light?

Scientists have discovered a unique rocky “super-Earth” orbiting one of the oldest stars in the galaxy

Everything you could want to know about Saturn!

Dark Matter is one of the biggest mysteries of our universe. It makes up more than a quarter of our universe, but what is it? And how do we know it's there? Find out about dark matter in this video.

You've probably heard the term Dark Matter, but what is it, and how do we know it exists?

Originally aired on February 27, 2009, a conversation on the Kepler Mission with Principal Investigator William Borucki, Deputy Principal Investigator David Koch, and Kepler Science Council Member Alan Boss from the Carnegie Institute of...

The James Webb Space Telescope, which launched Dec. 25, will allow us to see the farthest galaxies and better understand the origins of the Milky Way. Aaron Yung at NASA’s Goddard Space Flight Center is preparing for these historic...

How to Pronounce Well Known Greek Words in Greek | Easy Greek 97



Easy Greek is a project to help you learn Greek in an authentic and fun way. We interview people in the streets of Athens and other places in Greece. All our...

When light passes through the universe and is redshifted by the expansion of space itself, how is energy conserved? The stretched light has a longer wavelength and therefore a lower energy. Is energy conserved? If so, where does it go?

Almost everything you could want to know about the closest planet to the Sun, Mercury. Real HD photos and videos taken by the MESSENGER probe. We discuss the orbit, climate, geographical features, and general physical characteristics or...

Gateway is NASA's most ambitious project yet, so how to they plan to get a space station around the Moon? And why have one there in the first place? SLS, Artemis and Gateway.

Mars is a world similar in a lot of ways to our own. That doesn't mean there aren't a multitude of hurdles to overcome if we were ever to consider settling there.

Black holes, star births and deaths, colliding galaxies and more -- all in a day's work at the VLA



The Very Large Array, or VLA, is a complex of 27 massive antennas on the Plains of San Agustin in central New Mexico,...

Jupiter's second Galilean Moon, Europa.

There is an exoplanet, discovered by ESO's VLT, where it rains iron. But WASP-67b is 690 light years away, how could we possibly know that?