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DRAKE EQUATION - HOW MANY ARE OUT THERE POSTER
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DRAKE EQUATION - HOW MANY ARE OUT THERE POSTER
The DRAKE EQUATION sets out to estimate the number of technological civilizations that exist throughout the Universe.
It was conceived by then radio astronomer Dr. Frank Drake in 1961and identifies specific factors thought to play a role in the development of such civilizations.
N = The number of civilizations in The Milky Way Galaxy whose electromagnetic emissions are detectable.
R* =The rate of formation of stars suitable for the development of intelligent life.
fp = The fraction of those stars with planetary systems.
ne = The number of planets, per solar system, with an environment suitable for life.
fl = The fraction of suitable planets on which life actually appears.
fi = The fraction of life bearing planets on which intelligent life emerges.
fc = The fraction of civilizations that develop a technology that releases detectable signs of their existence into space.
L = The length of time such civilizations release detectable signals into space.
The equation has engendered much thought and enables deep thinkers to plug in their own postulated specifics to reach their own conclusion. Carl Sagan and Gene Roddenberry were proponents of the equation and had their own theories and permutations of the formula.
Customer Reviews
4.8 out of 5 stars rating14.1K Total Reviews
14,065 Reviews
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5 out of 5 stars rating
By Sharon S.July 31, 2025 • Verified Purchase
Print, Size: 36.00" x 25.10", Media: Value Poster Paper (Semi-Gloss)
I was so amazed at how this all turned out. Everyone who attended the funeral was in awe of how beautiful it was made.
And I owe it all to Zazzle. I wouldn’t have done it better myself not to mention I wouldnt have time to do it.
The great part of it all was they had templates that was catered to my needs and that I could use it in ways I wanted to use to resize it my way. It took some time but I was happy it turned out great. I did 100 photos, 89, 66 photos (I think) lol templates.
The only suggestion is that the templates, before sending through would tell you of errors like; saying please revise or resize it again for any photos that is not perfectly well sitting or not show it’s cutting off some of them and where it tells you there’s duplicates.
Staring, placing and resizing all 100 + pictures into the template can be tiresome and overwhelming and it makes my eyes blurred that I can’t tell if they’re cutting off or overlapping or duplicates.
Overall I am very pleased and will be using Zazzle again should the need arises.
Thank you Zazzle.
Altogether I’ve done 3 collages 1 profile picture and couple pictures with 1 frame and yet this is my first time ordering as a 1 time customer.
Prices were very reasonable and accommodating to my finances.
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5 out of 5 stars rating
By Peyton C.November 8, 2023 • Verified Purchase
Print, Size: 8.00" x 10.00", Media: Value Poster Paper (Semi-Gloss)
Zazzle Reviewer Program
The sign was beautiful and matched our theme. The paper was good quality. Excellent printing!!
5 out of 5 stars rating
By Marianne O.November 26, 2021 • Verified Purchase
Print, Size: 12.00" x 12.00", Media: Value Poster Paper (Semi-Gloss)
Creator Review
Fun bright artwork that really captures the mood I’m going for! Pop art with cyberpunk energy. A little sweet but also spicy. This art is the perfect size and vibe for our art gallery wall. The printing looks great, high quality with vibrant colors! I went with the semi-gloss finish, which adds a little extra shine and thickness to the print making it excellent for high-traffic areas like the staircase wall.
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Product ID: 228039757055144043
Created on: 3/30/2013, 9:16 AM
Rating: G
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