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«That&#39;s one small step for [a] man, one giant leap for mankind.» (Armstrong, astronaut)

«Poyekhali!» (Gagarin, cosmonaut)

«Earth is the cradle of humanity, but one cannot live in the cradle forever.» (Tsiolkovsky, pioneer of astronautics)

«We are made of star-stuff.» (Sagan, astrophysicist)

«Somewhere, something incredible is waiting to be known.» (Sagan, astrophysicist)

«Look up at the stars and not down at your feet.» (Hawking, theoretical physicist)

«Magnificent desolation.» (Aldrin, astronaut)

«Let&#39;s light this candle!» (Shepard, astronaut)

«E pur si muove.» (Galileo, astronomer)

«The universe is under no obligation to make sense to you.» (Tyson, astrophysicist)

«Any sufficiently advanced technology is indistinguishable from magic.» (Clarke, science-fiction writer)

«Exploration is really the essence of the human spirit.» (Borman, astronaut)

«The stars don&#39;t look bigger, but they do look brighter.» (Ride, astronaut)

«Equipped with his five senses, man explores the universe around him and calls the adventure Science.» (Hubble, astronomer)

«If I have seen further it is by standing on the shoulders of giants.» (Newton, physicist)

«We choose to go to the Moon not because it is easy, but because it is hard.» (Kennedy, president)

«The eternal silence of these infinite spaces frightens me.» (Pascal, philosopher)

«The starry heavens above me and the moral law within me.» (Kant, philosopher)

«The universe is not only queerer than we suppose, but queerer than we can suppose.» (Haldane, biologist)

«Science progresses best when observations force us to change our preconceptions.» (Rubin, astronomer)

«Never be limited by other people&#39;s limited imaginations.» (Jemison, astronaut)

«From space you see no borders on Earth.» (Glenn, astronaut)

«We leave as we came, and, God willing, as we shall return, with peace and hope for all mankind.» (Cernan, astronaut)

«If leaders could see the world from space, they would see how small and fragile it is.» (Collins, astronaut)

«Do not look at stars as bright spots only—try to take in the vastness of the universe.» (Mitchell, astronomer)

«I have learned to use the word &#39;impossible&#39; with the greatest caution.» (von Braun, rocket engineer)

«The love that moves the sun and the other stars.» (Dante, poet)

«I was merely thinking God&#39;s thoughts after Him.» (Kepler, astronomer)

«I would like to die on Mars; just not on impact.» (Musk, entrepreneur)

«The more you know, the less you fear.» (Hadfield, astronaut)

«The most incomprehensible thing about the Universe is that it is comprehensible.» (Einstein, physicist)

«Non est ad astra mollis e terris via.» — There is no easy way from the earth to the stars. (Seneca, philosopher)

«There are innumerable suns and earths, each circling its own sun.» (Bruno, philosopher)

«What we know is little; what we do not know is immense.» (Laplace, mathematician and astronomer)

«I have looked farther into space than any man before me.» (Herschel, astronomer)

«The book of nature is written in the language of mathematics.» (Kepler, astronomer)

«We must learn not from books but from the sky itself.» (Tycho Brahe, astronomer)

«In science we especially need imagination; it is not all mathematics nor all logic, but somewhat beauty and poetry.» (Mitchell, astronomer)

«Night is the astronomer&#39;s sunshine.» (Young, poet)

«Where is everybody?» — the question at the heart of the Fermi paradox. (Fermi, physicist)

«Black holes have no hair.» (Wheeler, physicist)

«We came all this way to explore the Moon, and the most important thing is that we discovered the Earth.» (Anders, astronaut)

«The Earth was small, blue, and so touchingly alone.» (Leonov, cosmonaut)

«Mars is there, waiting to be reached.» (Aldrin, astronaut)

«Houston, we&#39;ve had a problem.» (Lovell, astronaut)

«We can lick gravity, but sometimes the paperwork is overwhelming.» (von Braun, rocket engineer)

«Once you get to Earth orbit, you&#39;re halfway to anywhere in the Solar System.» (Heinlein, science-fiction writer)

«We don&#39;t want to conquer the cosmos; we simply want to extend Earth to its limits.» (Lem, writer)

«We are the Martians.» (Bradbury, writer)

«You— you alone will have the stars as no one else has them.» (Saint-Exupéry, writer)

«…and look&#39;d up in perfect silence at the stars.» (Whitman, poet)

«To see a World in a Grain of Sand… and hold Infinity in the palm of your hand.» (Blake, poet)

«At rest, however, in the middle of everything is the Sun.» (Copernicus, astronomer)

«To invent is to imagine what is not yet in the data; for that, imagination is essential.» (Poincaré, mathematician)

«We are the cosmos made conscious, and life is the means by which the universe understands itself.» (Cox, physicist)

«We are just an advanced breed of monkeys on a minor planet of a very average star, but we can understand the Universe. That makes us something very special.» (Hawking, theoretical physicist)

«SETI is not the search for extraterrestrial intelligence; it&#39;s the Search for Evidence of Intelligence.» (Tarter, astronomer)

«The stars call us not to possess them, but to be changed on the way to them.» (Seneca, philosopher)

«The nebulae turned out to be galaxies—great island universes.» (Hubble, astronomer)

«The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our pies—were made in the interiors of collapsing stars.» (Sagan, astrophysicist)

«It is difficult to say what is impossible; the dream of yesterday is the hope of today and the reality of tomorrow.» (Goddard, rocket engineer)

«I’ve never met a problem that patience and work didn’t make smaller — even in space.» (Hadfield, astronaut)

«We see farther when we look not only at the stars but at what lies between them.» (Bell Burnell, astrophysicist)

«I coined “Big Bang” as a jest; I didn’t expect the name to stick.» (Hoyle, astrophysicist)

«If the data disagree with the theory — so much the worse for the theory.» (Eddington, astrophysicist)

«When you rise above Earth, borders vanish and one homeland remains.» (Tereshkova, cosmonaut)

«The better we understand the Universe, the clearer we see how rare and precious Earth is.» (Hawking, theoretical physicist)

«Space does not forgive overconfidence — only precision and humility.» (Armstrong, astronaut)

«We build the future by turning the impossible into an engineering problem.» (von Braun, rocket engineer)

«Stars are laboratories where the chemistry of our life is brewed.» (Chandrasekhar, astrophysicist)

«If you want to find life in the Universe — look for water and time.» (Sagan, astrophysicist)

«The laws of physics are the passport by which we travel to the stars.» (Tyson, astrophysicist)

«We classified thousands of stars, and the Universe became friendlier.» (Cannon, astronomer)

«Gravitational waves are the music of spacetime.» (Thorne, theoretical physicist)

«The map is not the territory; likewise, a model of the cosmos is not the cosmos itself.» (Poincaré, mathematician)

«We go to Mars not for a flag, but for our children’s future.» (Musk, entrepreneur)

«Every night is an invitation to discovery.» (Mitchell, astronomer)

«Space is where courage must partner with discipline.» (Ride, astronaut)

«Art anticipates astronautics — imagination always lifts off first.» (Clarke, science-fiction writer)

«The view of Earthrise changed me forever.» (Anders, astronaut)

«We live on a mote lit by an average star — and yet we understand this.» (Greene, theoretical physicist)

«Once you get to Earth orbit, you’re halfway to anywhere in the Solar System.» (Heinlein, science-fiction writer)

«Everything not forbidden by the laws of physics is achievable with the right knowledge.» (Deutsch, physicist)

«Galaxies behave as if they contain more matter than we can see.» (Rubin, astronomer)

«We will move heavy industry into space and keep Earth a garden.» (Bezos, entrepreneur)

«The high frontier isn’t a planet but orbit: there’s more livable area there than on any world.» (O’Neill, physicist)

«Time is what we call change in the Universe.» (Rovelli, theoretical physicist)

«Space calls on us to be better than we are.» (Jemison, astronaut)

«We are not alone in the cosmos in the sense that we are part of it.» (Sagan, astrophysicist)

«The cosmos is all that is or was or ever will be.» (Sagan, astrophysicist)

«Astronomy compels the soul to look upward and leads us from this world to another.» (Plato, philosopher)

«There are more things in heaven and earth, Horatio, than are dreamt of in your philosophy.» (Shakespeare, playwright)

«For my part I know nothing with any certainty, but the sight of the stars makes me dream.» (Van Gogh, painter)

«Space is big. Really, really big.» (Adams, writer)

«The surface of the Earth is the shore of the cosmic ocean.» (Sagan, astrophysicist)

«Per aspera ad astra — through hardships to the stars.» (Latin proverb, aphorism)

«Spaceflight will never tolerate carelessness, incapacity, and neglect.» (Grissom, astronaut)

«To confine our attention to terrestrial matters would be to limit the human spirit.» (Hawking, theoretical physicist)

«The Moon is a harsh mistress.» (Heinlein, science-fiction writer)

«Look deep into nature, and then you will understand everything better — even the stars.» (Einstein, physicist)

«Discovery consists of seeing what everybody has seen and thinking what nobody has thought.» (Szent-Györgyi, physiologist)

«The sky is the daily bread of the eyes.» (Emerson, essayist)

«We are all in the gutter, but some of us are looking at the stars.» (Wilde, writer)

«Across the sea of space, the stars are other suns.» (Huygens, astronomer)

«We fashion science as a ship to sail the ocean of the unknown.» (Popper, philosopher of science)

«The map is not the territory; nor is cosmology the universe itself.» (Korzybski, philosopher)

«Space is for everybody — not just scientists and astronauts.» (McAuliffe, teacher-astronaut)

«Look again at that pale blue dot. That’s here. That’s home. That’s us.» (Sagan, astrophysicist)

«The heavens live within us when we learn to wonder.» (Browning, poet)

«Engineering is a dream audited by physics. In space, nothing else will do.» (Kranz, flight director)

«Science is a way of not fooling ourselves when the facts are unpleasant.» (Feynman, physicist)

«The music of the spheres is mathematics heard by the heart.» (Kepler, astronomer)

«The cosmic perspective widens our circle of concern — from family to planet.» (Tyson, astrophysicist)

«The view from space teaches humility — and responsibility.» (Mitchell, astronaut)

«We go because the questions are larger than ourselves.» (Gagarin, cosmonaut)

«If you want to build a ship, teach people to long for the endless immensity of the sea.» (Saint-Exupéry, writer)