Visions for the 21st Century: Audiobook
According to The Books Insider's catalog data, the Visions for the 21st Century audiobook runs 2 hours unabridged, narrated by Carl Sagan (about 1.3 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 2 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 4 days |
| 1 hour / day | 2 days |
| 2 hours / day | 1 day |
| 1 hour / day at 1.5× | 2 days |
You'll finish in – by –
Part of The Audiobook Finish-Time Calculator: the same instrument for any audiobook we measure.
What our data says
- At 2 hours, it is shorter than 86% of the 1,009 Astronomy & Physics audiobooks in our catalog.
More narrated by Carl Sagan
Carl Sagan narrates 5 unabridged audiobooks in our catalog, 18 hours in all.
About as long, on the Astronomy & Physics shelf
19 Astronomy & Physics audiobooks in our catalog run within 10% of this length. The most popular on the store:
- Space at the Speed of Light: The History of 14 Billion Years for People Short on Time
- Curie And Radioactivity
- The International Space Station: The History and Legacy of the Multinational Space Research Lab
- Aztec Astronomy and Astrology: The History of the Aztec’s Measurements of the Planets and Stars
- All About Moon Bases-And Our Plans to Return to the Moon
Computed from 409,794 English-language unabridged audiobooks in The Books Insider catalog (store data read November 3, 2026). Lengths are the store's own running times. Methodology.
About this listen
Visions for the 21st Century is an audiobook by Carl Sagan: a 2-hour unabridged recording, read by Carl Sagan, released October 24, 1995, on the Astronomy & Physics shelf.
The listen at a glance
- Length
- 2 hrs
- Narrated by
- Carl Sagan
- Released
- October 24, 1995
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Astronomy & Physics
- ISBN
- 9781615440283
How to listen to Visions for the 21st Century free
New members at audiobooks.com get three free audiobooks with the trial.
Separately, the store's catalog carries more than 10,000 audiobooks that are always free to stream.
Start listening freeQuestions listeners ask
How long is the Visions for the 21st Century audiobook?
Visions for the 21st Century runs 2 hours unabridged. At 1.5× speed that drops to roughly 1.3 hours.
Is the Visions for the 21st Century audiobook free?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates Visions for the 21st Century?
Visions for the 21st Century is narrated by Carl Sagan.