Biggest things in space

10:35

Last week we covered multiple star systems, but what if we added thousands or even millions of stars to the mix? A star cluster. There are different kinds of clusters, though. Open clusters contain hundreds or thousands of stars held together by gravity. They’re young, and evaporate over time, their stars let loose to roam space freely. Globular clusters, on the other hand, are larger, have hundreds of thousands of stars, and are more spherical. They’re very old, a significant fraction of the age of the Universe itself, and that means their stars have less heavy elements in them, are redder, and probably don’t have planets (though we’re not really sure).

35 • Crash Course Astronomy • 2015 • Astronomy

43:00

Scientists attempt to understand how this strange force of magnetism works.

S4E8 • How the Universe Works • 2015 • Astronomy

42:02

From the furthest reaches of space to our own cosmic backyard, we count down the discoveries that changed everything we know about our universe.

S5E1 • How the Universe Works • 2016 • Astronomy

10:13

Phil starts the planet-by-planet tour of the solar system right here at home, Earth.

11 • Crash Course Astronomy • Astronomy

88:36

Luminous tells the story of the first astronomer in history to publicly predict the near-future explosion of a star--will he be right? Others in the astronomical community are skeptical, and professional reputations hang in the balance. In production for five years, Luminous follows Larry Molnar's journey to test an unprecedented prediction, knowing that its success or failure will unfold squarely in the international spotlight.

2022 • Astronomy

42:00

The first close-up images of Pluto revealed unimaginable secrets of this mysterious frozen world. Now, scientists investigate if Pluto is home to a warm ocean of liquid water beneath its surface, and whether this underground ocean could harbour life.

S5E3 • How the Universe Works • 2016 • Astronomy