“I realized up there that our planet is not infinite. It's fragile. That may not be obvious to a lot of folks, and it's tough that people are fighting each other here on Earth instead of trying to get together and live on this planet. We look pretty vulnerable in the darkness of space.”
Josh Getlin, Los Angeles Times (July 19, 1994) "What Does Moon Flight Mean Now", The Seattle Times, p. A10.
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Alan Shepard 24
American astronaut 1923–1998Related quotes

“We (Ecuador) may be a small territory... but the planet (earth) is also ours.”
Source: Guillermo Lasso (2021) cited in: " Ecuador expands sea life protections around Galapagos https://phys.org/news/2022-01-ecuador-sea-life-galapagos.html" in phys.org, 15 January 2022.

“Fragile creatures of a small blue planet, surrounded by light years of silent space.”
Source: Written on the Body

Nobel lecture (1989)
Context: Because we all share this small planet earth, we have to learn to live in harmony and peace with each other and with nature. That is not just a dream, but a necessity. We are dependent on each other in so many ways, that we can no longer live in isolated communities and ignore what is happening outside those communities, and we must share the good fortune that we enjoy.

Source: The Aquarian Conspiracy (1980), Chapter Thirteen, The Whole- Earth Conspiracy, p.407

On the Paris Agreement, as quoted in " Factbox: World reacts to new climate accord http://www.reuters.com/article/us-climatechange-summit-reaction-factbox-idUSKBN0TV0Q420151213", Reuters (12 December 2015)

“The supreme reality of our time is the vulnerability of our planet.”

[ Terry Oldes http://www.terryoldes.com/, A Barrel Full of Monkeys – OR – More Baggage Than Ann Miller Brought On the Love Boat, 2008-03-28, 2007-08-14, Starbooks Press http://www.starbookspress.com/, Sarasota, Florida, Foozie, http://www.missfoozie.com/terryoldes.htm]
[ Terry Oldes http://www.terryoldes.com/, Miss Foozie, http://www.missfoozie.com/terryoldes.htm, "Foozie" by Terry Oldes, MISS FOOZIE http://www.missfoozie.com/, 2009-03-30]