Why is the Night Sky Dark? | Neil deGrasse Tyson Explains...
Why is the sky dark at night? On this explainer, Neil deGrasse Tyson and Chuck Nice go over Olbers’ Paradox and why the night’s sky is dark. Hint: it’s not just because it’s nighttime.
Why isn’t the entire night’s sky ablaze with stars? We travel back to the early 1800s to discover Heinrich Wilhelm Olbers’ confounding question: if the universe is infinite, shouldn’t every sightline land on a star? We discuss physics and equations for star brightness. If you put the sun three times farther away how much area in the sky does it take up? How did discovering the expanding universe finally help confirm this question?
Get the NEW Cosmic Queries book (5/5 ⭐s on Amazon!): https://amzn.to/3dYIEQF
Support us on Patreon: https://www.patreon.com/startalkradio
FOLLOW or SUBSCRIBE to StarTalk:
Twitter: http://twitter.com/startalkradio
Facebook: https://www.facebook.com/StarTalk
Instagram: https://www.instagram.com/startalk
About StarTalk:
Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up!
#StarTalk #NeildeGrasseTyson
0:00 - Introduction
0:52 - Surface Brightness
4:12 - Olber’s Paradox
6:16 - Hubble’s Discovery
7:40 - How Light Travels
10:38 - Closing Notes
Видео Why is the Night Sky Dark? | Neil deGrasse Tyson Explains... канала StarTalk
Why isn’t the entire night’s sky ablaze with stars? We travel back to the early 1800s to discover Heinrich Wilhelm Olbers’ confounding question: if the universe is infinite, shouldn’t every sightline land on a star? We discuss physics and equations for star brightness. If you put the sun three times farther away how much area in the sky does it take up? How did discovering the expanding universe finally help confirm this question?
Get the NEW Cosmic Queries book (5/5 ⭐s on Amazon!): https://amzn.to/3dYIEQF
Support us on Patreon: https://www.patreon.com/startalkradio
FOLLOW or SUBSCRIBE to StarTalk:
Twitter: http://twitter.com/startalkradio
Facebook: https://www.facebook.com/StarTalk
Instagram: https://www.instagram.com/startalk
About StarTalk:
Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up!
#StarTalk #NeildeGrasseTyson
0:00 - Introduction
0:52 - Surface Brightness
4:12 - Olber’s Paradox
6:16 - Hubble’s Discovery
7:40 - How Light Travels
10:38 - Closing Notes
Видео Why is the Night Sky Dark? | Neil deGrasse Tyson Explains... канала StarTalk
Показать
Комментарии отсутствуют
Информация о видео
Другие видео канала
![Neil deGrasse Tyson Explains “The Sunset Illusion”](https://i.ytimg.com/vi/9bww_ux8NCo/default.jpg)
![Neil deGrasse Tyson Explains Electric Cars](https://i.ytimg.com/vi/CxmncZN-V4o/default.jpg)
![Multiverses & Wormholes with Brian Cox & Neil deGrasse Tyson – Cosmic Queries](https://i.ytimg.com/vi/YFOeXZUlrKY/default.jpg)
![Neil deGrasse Tyson Explains Alien Visits, UFOs, and Other Conspiracies](https://i.ytimg.com/vi/O2jJ3wjEyZk/default.jpg)
![Neil deGrasse Tyson Explains the REAL Length of Day](https://i.ytimg.com/vi/w7lad5a4XhI/default.jpg)
![What is the Grandfather Paradox? | Neil deGrasse Tyson Explains…](https://i.ytimg.com/vi/baUSaFx8M1o/default.jpg)
![Neil deGrasse Tyson Explains Why Some Info Is Need to Know](https://i.ytimg.com/vi/RQj0cxHJ4fc/default.jpg)
![What Makes a Molecule? | Neil deGrasse Tyson Explains…](https://i.ytimg.com/vi/SqX70ypN7bA/default.jpg)
![Neil deGrasse Tyson Explains the Sun](https://i.ytimg.com/vi/apRVqNc4UhE/default.jpg)
![Neil deGrasse Tyson Explains Worldlines](https://i.ytimg.com/vi/ZU9YIkttdiA/default.jpg)
![Neil deGrasse Tyson Explains the REAL Color of the Sun](https://i.ytimg.com/vi/C9MdbxPCSYw/default.jpg)
![Neil deGrasse Tyson Explains the Earth's Rotation](https://i.ytimg.com/vi/p9MAtyWEjZY/default.jpg)
![Neil deGrasse Tyson Explains Big Numbers](https://i.ytimg.com/vi/YPenDUY68rM/default.jpg)
![Neil deGrasse Tyson Explains Friction](https://i.ytimg.com/vi/XJcFWR9LrBU/default.jpg)
![Neil deGrasse Tyson Explains Why Craters Are Round](https://i.ytimg.com/vi/xRnr79Fa554/default.jpg)
![Neil deGrasse Tyson Explains Space Telescopes](https://i.ytimg.com/vi/7aGJ69u76vA/default.jpg)
![Neil deGrasse Tyson Explains How We See Colors](https://i.ytimg.com/vi/OtcxYsUS_wc/default.jpg)
![Neil deGrasse Tyson Explains the Difference Between Mass, Weight, and Density](https://i.ytimg.com/vi/3s9AYGYm_iI/default.jpg)
![Neil deGrasse Tyson Explains the Sounds of Weather](https://i.ytimg.com/vi/D47wzLYuRuI/default.jpg)
![Neil deGrasse Tyson Explains Wormholes](https://i.ytimg.com/vi/1fFrpBJDMJo/default.jpg)