Quotessence
Home / Quotes / Quote by Carl Sagan

Quote by Carl Sagan

Work

Carl Sagan: a life

This biography delves into the life of Carl Sagan, highlighting his groundbreaking work in astronomy, his advocacy for the search for extraterrestrial life, and his influential role in popularizing science through television and writing. The book covers his early life, education, scientific achievements, and personal beliefs, offering a detailed portrait of one of the most influential scientists of the 20th century. more

Author

Carl Sagan
Carl Sagan

Carl Sagan was an American astronomer, cosmologist, author, and science communicator, born on November 9, 1934, in Brooklyn, New York. He is renowned for his profound research into the cosmos and his dedication to popularizing science. Sagan proposed numerous theories about the origin of the universe and life, and he made complex scientific knowledge accessible to the public with his unique perspective and clear, engaging writing style. more

You May Also Like

“I never said it. Honest. Oh, I said there are maybe 100 billion galaxies and 10 billion trillion stars. It's hard to talk about the Cosmos without using big numbers. I said "billion" many times on the Cosmos television series, which was seen by a great many people. But I never said "billions and billions." For one thing, it's too imprecise. How many billions are "billions and billions"? A few billion? Twenty billion? A hundred billion? "Billions and billions" is pretty vague. When we reconfigured and updated the series, I checked-and sure enough, I never said it.”

PeopleSaidHardEnoughBigsStarsNumbersOne ThingHonestTelevisionHundredTwentiesSeriesBillionsAstronomyGreat MenCosmosVagueGalaxyCosmology
Author:Carl Sagan
Create image

“They have likewise discovered two lesser stars, or satellites, which revolve around Mars, whereof the innermost is distant from the center of the primary exactly three of his diameters, and the outermost five: the former revolves in the space of ten hours, and the latter in twenty-one and a half, so that the squares of their periodical times are very near in the same proportion with the cubes of their distances from the center of Mars; which evidently shows them to be governed by the same Law of Gravitation that influences the other heavenly bodies.”

TwoBodyLawThreeStarsHoursSpaceHalfFiveInfluenceFutureTenTwentiesDistanceFormerPrimariesProportionLatterHeavenlySquaresMarsPredictionsTwenty OneSatellitesCubesGravitationHeavenly Bodies
Author:Jonathan Swift
Create image

“From the moment they had left the Earth, their own weight, and that of the Projectile and the objects therein contained, had been undergoing a progressive diminution. . . . Of course, it is quite clear, that this decrease could not be indicated by an ordinary scales, as the weight to balance the object would have lost precisely as much as the object itself. But a spring balance, for instance, in which the tension of the coil is independent of attraction, would have readily given the exact equivalent of the loss.”

MomentsEarthCoursesLostLeftGivenLossClearObjectsBalanceFutureSpringOrdinaryWeightIndependentAttractionScalesInstanceTensionProgressivePredictionsDecreaseProjectile
Book:All Around The Moon
Create image

“The distance between the earth and her satellite is a mere trifle, and undeserving of serious consideration. I am convinced that before twenty years are over one-half of our earth will have paid a visit to the moon.”

YearsEarthHalfSeriousFutureMoonPaidTwentiesDistanceMereConvincedConsiderationPredictionsTriflesSatellitesOne HalfUndeserving
Book:From the Earth to the moon/De la Terre à la lune (Bilingual edition/Édition bilingue)
Create image