Are we alone in the universe—or just early to the party? We’ll explore the math, models, and megastructures that might answer how many alien civilizations are out there, and why the night sky remains so quiet.

Watch my exclusive video Fishbowl Starships - Water As Shielding - https://nebula.tv/videos/isaacarthur-fishbowl-starships-water-as-shielding

Get Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur

Get a Lifetime Membership to Nebula for only $300: https://go.nebula.tv/lifetime?ref=isaacarthur

Use the link gift.nebula.tv/isaacarthur to give a year of Nebula to a friend for just $30.


Visit our Website: http://www.isaacarthur.net

Join Nebula: https://go.nebula.tv/isaacarthur

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SFIA Discord Server: https://discord.gg/53GAShE



Credits:

How Many Alien Civilizations Are There?

Episode 723; June 8, 2025 

Written, Produced & Narrated by: Isaac Arthur

Editor: Ludwig Luska

Graphics: Ken York YD Visual

Select imagery/video supplied by Getty Images

Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

Phase Shift, "Forest Night"

 Chris Zabriskie, "Unfoldment, Revealment" & "A New Day in a New Sector" 

Koalips, "Kvazar"

 Stellardrone, "Red Giant" & "Billions and Billions"

How Many Alien Civilizations Are There? (Narration Only)

Interstellar travel may one day take us to the stars, but surviving the journey could be the greatest challenge humanity has ever faced. In this episode, we explore the physical, psychological, and societal trials of a voyage that could span centuries—or forever.

Watch my exclusive video Fishbowl Starships - Water As Shielding - https://nebula.tv/videos/isaacarthur-fishbowl-starships-water-as-shielding
Get Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur
Get a Lifetime Membership to Nebula for only $300: https://go.nebula.tv/lifetime?ref=isaacarthur
Use the link gift.nebula.tv/isaacarthur to give a year of Nebula to a friend for just $30.

Visit our Website: http://www.isaacarthur.net
Join Nebula: https://go.nebula.tv/isaacarthur
Support us on Patreon: https://www.patreon.com/IsaacArthur
Support us on Subscribestar: https://www.subscribestar.com/isaac-arthur
Facebook Group: https://www.facebook.com/groups/1583992725237264/
Reddit: https://www.reddit.com/r/IsaacArthur/
Twitter: https://twitter.com/Isaac_A_Arthur on Twitter and RT our future content.
SFIA Discord Server: https://discord.gg/53GAShE
Credits:
Interstellar Travel: Can We Survive The Long Journey?
Episode 724; June 12, 2025
Written, Produced & Narrated by: Isaac Arthur
Graphics:
Bryan Versteeg
Jarred Eagley
Jeremy Jozwik
Melanvois
Udo Schroeter
Select imagery/video supplied by Getty Images 
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator
Chris Zabriskie, "Unfoldment, Revealment", "A New Day in a New Sector", "Oxygen Garden", "Wonder Cycle"
Stellardrone, "Red Giant", "Billions and Billions"

Interstellar Travel: Can We Survive the Long Journey? (Narration Only)

Echoes of Andromeda

1. Radioactive Sandwich - La Muerte Peluda
2. Mindphoria - The Picture 
3. Globular - Infinity Inside 
4. Creotaur - ICED 
5. Dhamika - Spiritual Beings 
6. Slackbaba - The Wanderer 
7. Chronos - Swinging Satori 
8. Harmonic Frequency - Sun Makes Everything More Beautiful
9. Eliptical Sound System - Somango Dub 
10. Naturelement - Black Hole To The Soul 
11. Supersillyus - Touchy Subject 
12. In Orbit - Nystart 
13. Green Beats - Atlas 
14. Tsykhra - Colonization 
15. ManMadeMan - Sub Aqua 
16. Lab's Cloud - The Kundalini Ascension 
17. Lemonchill - Hoatzin 
18. Green Beats - 80'S Technology

New podcast #829 Galaxy - Chill Out @ 08.06.2025. Playlist inside.

Andromeda

I have been experimenting with my sound and style a lot recently - as well as production and mastering. This song is one I am very proud of but I don’t think it neccissarily belongs on any project I will make - but I felt like I wanted to let people hear some of my music and I thought this may be a fun one to let lose into the world... alr enjoy
-> and remember you are the stars <3

Sun and the Stars

GALAXY - TONY

Space Arena (spacey trap beat)_155_Em.mp3

wobble galaxy

This track can be used for free on Youtube, social-media etc. If you credit us in your Youtube description: 'www.purple-planet.com', it should ensure you don't get any Content ID matches.

Mysterious, expectant, chords on tremolo strings with gentle orchestral washes create a laid-back, futuristic space style track with an element of discovery, reflection, adventure and beauty. Builds to two emotional climaxes. Track suggests drifting through space observing something special or amazing. Very useful for inspirational video, documentary or film scene, where a sense of enormity and vastness is needed.

Planetarium - Free to Use Music

Project Galaxy became result of our joint creativity by radio. «When there comes night and stars become brighter…» – This slogan became certain mark of our aethers. Their idea it, symbiosis of directions and styles a music trance. At sources of creation of the program stood, as well as at present is its inspirer Michael Acid aka Dj.Acid. Arisen in 2003 as the high-grade radio, radio-project broadcasting on waves of various radio stations of Krasnodar town, has gradually found the shelter on Internet open spaces, in new quality podcast, having won love of adherents a trance and chillout music.

Jacob Brosemann is a chill beats producer from Portland, Oregon. Starting our making beats on a laptop in his kitchen, Jacob draws inspiration from his friends, family, and passions. With a focus on ethereal vibes, Jacob creates music that makes listeners feel relaxed, optimistic, and enthralled. When not making music, Jacob enjoys playing volleyball and hanging out with friends.

Explore the cosmos with Jacob Brosemann's upcoming releases, part of his Galaxy Lofi Album.

The Soundcloud home of Chris Martyn and Geoff Harvey of Purple Planet Music. You are welcome to download music for your projects direct from here. 
The tracks can be used for free on youtube, social-media etc. If you credit in your youtube description: ‘Music - Purple Planet Music’, it should ensure you don't get any Content ID matches. 
 Please contact us via email at:

payment@purple-planet.com

DMV based 📍Producer, Artist, & Content Creator. Making good music accessible to creatives and audiences everywhere.

New tracks tagged #galaxy