Browse Quotes
1,161 quotes
It is necessary to speak and to think what is truly being; for being is, but nothing is not.
Parmenides
Philosophy
No man ever steps in the same river twice, for it's not the same river and he's not the same man.
Heraclitus
Philosophy
As our soul, being air, holds us together, so breath and air encompass the whole world.
Anaximenes of Miletus
Philosophy
The black hole at the center of our galaxy is a fantastic laboratory for understanding how gravity works in the most extreme environment.
Andrea Ghez
Astronomy
Space-time tells matter how to move; matter tells space-time how to curve.
Kip Thorne
Astrophysics
The universe is expanding, and it's doing so at an accelerating rate. This was a complete surprise to us.
Brian Schmidt
Cosmology
The universe is not only stranger than we imagine, it is stranger than we can imagine.
Saul Perlmutter
Cosmology
The universe is not only expanding, but its expansion is accelerating. This was a complete surprise.
Adam Riess
Cosmology
The universe is not only stranger than we imagine, it is stranger than we can imagine.
Wendy Freedman
Astronomy
Space is not a thing, it is a relationship.
Fred Hoyle
Cosmology
The pursuit of science is not a race, but a journey.
Subrahmanyan Chandrasekhar
Astrophysics
The universe is expanding, and this expansion can be traced back to an initial state of extreme density and temperature.
Georges Lemaître
Cosmology
A straight line of dots, representing the relation between the brightness of the variables and their periods, can be drawn.
Henrietta Swan Leavitt
Astronomy
I have found the planet.
Urbain Le Verrier
Astronomy
The stars are not fixed, but are in motion.
Friedrich Bessel
Astronomy
I am nothing, I have nothing, I can do nothing, but I will do my best.
Caroline Herschel
Astronomy
The heavens are a book, where God has written his wonders.
William Herschel
Astronomy
The comet of 1682, which I have observed, and whose elements I have computed, will, I am confident, return again in the year 1758.
Edmond Halley
Astronomy
The heavens are not simple, but composed of spheres, and the motion of each sphere is uniform and circular.
Nasir al-Din al-Tusi
Astronomy
The eye is not a source of light, but rather a receiver of light.
Alhazen
Astronomy