The sky is no longer the limit; 140 characters still are...

This collection of quotes, wisecracks and oneliners was originally tweeted from the Modified Mars Twitteraccount. I felt they deserved a more permanent location; after all, colonizing the Galaxy is a long term project.

Some of these tweets are funny, others are dead serious; occasionally they're both. And they all are, sometimes very obvious, in other cases rather remotely, linked to themes like Mars, spaceflight, astronomy or the universe in general.

“We are all in the gutter, but some of us are looking at the stars.”
Oscar Wilde
“Maybe the future belongs not to us, but to the Martians.”
from Jeff Wayne's musical version of H.G. Wells' The War of the Worlds
“Mars will be colonized. If we don't do it, the racoons will, in 50 million years.”
Robert Zubrin
“Space isn't remote at all. It's only an hour's drive away if your car could go straight upwards.”
Fred Hoyle
“Things are only impossible until they're not.”
Jean-Luc Picard
“We have lingered long enough on the shores of the cosmic ocean. We are ready at last to set sail for the stars”
Carl Sagan
“Why, I ask myself, shouldn’t the shining dots of the sky be as accessible as the black dots on the map of France?”
Vincent van Gogh
“Fly me to the moon and let me play among the stars. Let me see what spring is like on Jupiter and Mars.”
Frank Sinatra
“The past is but the beginning of a beginning, and all that is and has been is but the twilight of the dawn.”
H.G. Wells
“Given ships or sails adapted to the breezes of heaven, there will be those who will not shrink from even that vast expanse."
Johannes Kepler
“Once we have established many worlds, we can do whatever we want as long as we do it one world at a time."
Isaac Asimov
“The important achievement of Apollo was a demonstration that humanity is not forever chained to this planet.”
Neil Armstrong
“My chances of being PM are about as good as the chances of finding Elvis on Mars.”
Boris Johnson
“Worlds may freeze and suns may perish, but there stirs something within us now that can never die again."
“We live at what could be a defining moment for the cosmos, not just for our Earth.”
Martin Rees
“In the beginning the Universe was created. This has made a lot of people very angry and been widely regarded as a bad move.”
Douglas Adams
“In the universe, space travel may be the normal birth pangs of an otherwise dying race. A test. Some races pass, some fail."
Robert Heinlein
“Only in a universe of unlimited resources can all men be brothers."
Robert Zubrin
“The glowworm that explores the dust will never know there are stars in the sky”
Rabindranath Tagore

“In the new wilderness of the Solar System may lie the future preservation of mankind."
Arthur C. Clarke
“The future belongs to those who believe in the beauty of their dreams.”
Eleanor Roosevelt
“The whole world is my homeland.”
Desiderius Erasmus
“I would like to die on Mars. Just not on impact.”
Elon Musk
“For small creatures such as we the vastness is bearable only through love.”
Carl Sagan
"Satellite's gone, way up to Mars. Soon it will be filled with parking cars."
Lou Reed
“Men are from Mars, women are from Venus and real men go back!”
Richard Reekers
“The goal for the solar system would seem to be that it should become an interplanetary community of very diverse worlds.”
Olaf Stapledon
"Those planets that are not inhabited now, will be at some time in the future."
Immanuel Kant
“Without space included in the equation, 'sustainable growth' is an oxymoron.”
Rick Tumlinson
“The American colonies would never have been pioneered if the ships that crossed the ocean hadn't been reusable.”
Elon Musk
“Water is the key to life, but in frozen form, it is a latent force. And when it vanishes, Earth becomes Mars.”
Frans Lanting
“And out comes the man from Mars. And you try to run but he's got a gun And he shoots you dead and he eats your head”
“If the Earth is the cradle of mankind, the Solar System is the schoolyard.”
Robert Zubrin
“Going to Mars is not a luxury we can't afford – it is a necessity we can't afford to be without.”
James Cameron
“Maybe this world is another planet's Hell.”
Aldous Huxley
“Politicians should read science fiction, not westerns and detective stories.”
Arthur C. Clarke

'Often, something has to happen before something happens.'
Johan Cruijff
“The universe is a pretty big place. If it's just us, seems like an awful waste of space.”
Carl Sagan
“If you think this universe is bad, you should see some of the others.”
Philip K. Dick
“Whether or not it is clear to you, no doubt the universe is unfolding as it should.”
Max Ehrmann
“I had plans for that life!”
From The Years of Rice and Salt, Kim Stanley Robinson
"Many, and some of the most pressing, of our terrestrial problems can be solved only by going into space.
Arthur C. Clarke
"Clearly our first task is to use the material wealth of space to solve the urgent problems we now face on Earth."
Gerard O'Neill
"Our only chance of long term survival, is not to remain inward looking on planet Earth, but to spread out into space."
Stephen Hawking
“The crisis of today is the joke of tomorrow.”
H.G. Wells
“Somewhere, something incredible is waiting to be known.”
Carl Sagan
“The English eat all sorts of birds, pigeons, ducks, sparrows. but if you tell them you eat puffin, you might as well come from Mars.”
"By exploring and understanding Mars, we may gain key insights into the past and future of our own world."
Buzz Aldrin
“Adventure is worthwhile in itself.”
Amelia Earhart
"Anyone who lives within their means suffers from a lack of imagination."
Oscar Wilde
"Time is a companion on our journey, reminding us to cherish every moment, for it will never pass again."
Jean-Luc Picard
“The universe is not required to be in perfect harmony with human ambition.”
Carl Sagan
“I look for what needs to be done. After all, that's how the universe designs itself.”
R. Buckminster Fuller
“The world and the universe are far more wonderful if there's not a puppet master.”
Dave Matthews
“Two possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying.”
Arthur C. Clarke
“It is good to have an end to journey toward, but it is the journey that matters in the end.”
Ursula K. Le Guin
“You are the universe, you aren't in the universe.”
Eckhart Tolle
“The universe is a big place, perhaps the biggest.”
Kurt Vonnegut