27 Quotes by Carl Sagan about cosmos

  • Author Carl Sagan
  • Quote

    The Hindu religion is the only one of the world’s great faiths dedicated to the idea that the Cosmos itself undergoes an immense, indeed an infinite, number of deaths and rebirths.It is the only religion in which the time scales correspond to those of modern scientific cosmology. Its cycles run from our ordinary day and night to a day and night of Brahma, 8.64 billion years long. Longer than the age of the Earth or the Sun and about half the time since the Big Bang.

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  • Author Carl Sagan
  • Quote

    The total amount of energy from outside the solar system ever received by all the radio telescopes on the planet Earth is less than the energy of a single snowflake striking the ground.

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  • Author Carl Sagan
  • Quote

    Books break the shackles of time. A book is proof that humans are capable of working magic.

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  • Author Carl Sagan
  • Quote

    Meanwhile the Cosmos is rich beyond measure: the total number of stars in the universe is greater than all the grains of sand on all the beaches of the planet Earth.

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  • Author Carl Sagan
  • Quote

    Would we argue that ten thousand target nuclear warheads are likely to enhance the prospect for our survival? What account would we give of our stewardship of the planet Earth? We have heard the rationales offered by the nuclear superpowers. We know who speaks for the nations. But who speaks for the human species? Who speaks for Earth?

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