How Two Astronomers Accidentally Discovered the Big Bang

How Two Astronomers Accidentally Discovered the Big Bang

Nowadays, it’s a universally accepted theory that the universe began 13.8 billion years ago with the Big Bang. But did you know that two radio astronomers unintentionally stumbled upon its discovery?

In the 1960s, Robert Wilson and Arno Penzias were measuring the brightness of the sky with their radio telescope. No matter where they pointed it, they picked up an inexplicable droning sound. What initially sounded like a mistake ended up being the discovery of a lifetime.

Amazing Mirror Experiment Reveals Invisible Air Movement!

Amazing Mirror Experiment Reveals Invisible Air Movement!

This unreal experiment allows you to see air movement around any object.

This is a demonstration of the Schlieren effect. This setup allows you to see changes in air density. The point light source is aimed at the concave mirror. The concave mirror reflects to a focal point. There you use a sharp edged object to partially block the light which helps create a shadow effect that allows you to see air movement.

What is the Yarkovsky Effect?

What is the Yarkovsky Effect?

OSIRIS-REx presents the new 321Science video about how sunlight can affect the orbits of small asteroids.

This video explores how the Yarkovsky effect occurs and how it can change the orbits of asteroids—changing near misses to impacts or impacts to near misses.

(Credit: University of Arizona)