Power Play • 2018 • episode "S2E5" • MARS

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

42:28

Our universe's stars are dying off faster than new ones are born, and using the latest technology, experts investigate the secrets of the last stars of the cosmos and what this stellar apocalypse means for life on earth.

S8E4 • How the Universe Works • 2020 • Astronomy

88:57

Planet Earth has been home to humankind for over 200,000 years, but with a population of 7.3 billion and counting and limited resources, this planet might not support us forever. Professor Stephen Hawking thinks the human species will have to populate a new planet within 100 years if it is to survive. With climate change, pollution, deforestation, pandemics and population growth, our own planet is becoming increasingly precarious.

2017 • Astronomy

42:29

We don't yet know where the edge of the universe is or what happens there; but thanks to cutting-edge technology and new discoveries, experts might finally reveal the secrets of the phenomena that can be found in deepest reaches of the cosmos.

S8E7 • How the Universe Works • 2020 • Astronomy

176:40

2003 - millions watch live as Columbia breaks up in the sky over Texas, killing all on board. NASA, loved ones and investigators share how an incredible journey ended in tragedy. Chapter 1: As Nasa prepares Space Shuttle Columbia for its 28th mission, excitement and trepidation build amongst the astronauts and their families as they count down to launch. This programme hears from the seven astronauts - a mixture of veterans and rookies - and their families as they train for an awe-inspiring journey of a lifetime. Chapter 2: Nasa engineers analyse film footage of a piece of debris striking the shuttle Columbia 81 seconds after launch. What no-one yet knows is whether any serious damage has been done to the vehicle or the tiles which protect the vehicle against the intense heat of re-entry. But calls for photographs to be taken of the shuttle using satellites go unheeded. Meanwhile, in space, the crew continue their mission, unaware of any concerns inside Nasa. Chapter 3: Sixteen minutes from landing, mission control lose contact with the crew of Columbia. On the shuttle landing strip, families waiting to welcome their loved ones back home are swiftly ushered away. In the skies over Texas, locals hear a loud explosion, and debris strikes the ground in multiple locations. The fears of some Nasa engineers are coming true: Columbia is lost and there are no survivors. Following the disaster, Nasa comes under increasing pressure from the media to provide answers.

2024 • Astronomy

6:31

It's hard to get to space.But there is a concept that might make it possible: the space elevator. How exactly does it work.

In a Nutshell • 2016 • Astronomy