Life Looks for Life • 1989 • episode "2/10" • The Sagan Series

11:22

The majority of the universe is made up of a currently mysterious entity that pervades space: dark energy. We don’t know exactly what it is, but we do know that dark energy accelerates the expansion of space. We think this means the Universe will expand forever, even as our view of it shrinks while space expands faster all the time.

43 • Crash Course Astronomy • 2015 • Astronomy

42:04

Astronomers are laying the groundwork to locate a new planet for the human race to inhabit, and the more alien worlds they discover and encounter, the more they unmask the mysterious and truly destructive nature of the cosmos.

S8E1 • Space's Deepest Secrets • 2021 • Astronomy

10:33

In order to understand how we study the universe, we need to talk a little bit about light. Light is a form of energy. Its wavelength tells us its energy and color. Spectroscopy allows us to analyze those colors and determine an object’s temperature, density, spin, motion, and chemical composition.

24 • Crash Course Astronomy • 2015 • Astronomy

42:31

Voyager has had a profound effect on our knowledge of the cosmos. Its mission was supposed to last five years but remains ongoing, fundamentally changing our understanding of the solar system. Featuring contributions from key scientists, we’ll explore what’s been achieved and what happens next.

S1E5 • Space's Deepest Secrets • 2016 • Astronomy

9:57

Did you know that we could start building a Lunar Base today?

In a Nutshell • 2018 • Astronomy

52:22

We’re going back to the moon. This episode explores how we did it in the past and how and why we will do it again. The moon is critical to future exploration. It will be where we learn to build sustainable colonies on other worlds.

Secrets of the Universe (Curiosity) • 2021 • Astronomy