Carl Sagan, the beloved American astronomer ... Twitter users are sharing some of Sagan's most insightful and inspiring quotes online.

Often referred to as the "astronomer of the people," Carl Sagan was one of the most popular scientists in American culture for decades. Friday marked what would have been Sagan's 84 birthday.

Through his poetic, inspirational words, late astronomer Carl Sagan ... the quotes with a brief description of each image below: "The origin and evolution of life are connected in the most ...

Astronomer Carl Sagan is widely ... a new generation will be inspired by Sagan’s legacy. To celebrate, I’ve compiled (out of many others) five of my favorite quotes from Sagan that represent ...

Astronomer Carl Sagan, called "America's most effective salesman of science" by Time magazine, spent much of his career translating technical scientific explanations into something easily ...

Through his poetic, inspirational words, the late astronomer Carl Sagan helped us ... Check out the quotes with a brief description of each image below: “The origin and evolution of life are connected ...

His quotes and insights are all over the internet, but here’s why you should really care about Carl Sagan ... is one of Sagan's most famous. The success of his words living on in memes shows ...

Carl Sagan was an eminent astronomer, cosmologist, author, and science communicator, well-known for his ability to capture the imagination with his words. Here are some of his most memorable quotes: ...