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111 Astronomer Quotes

The earth together with its surrounding waters must in fact have such a shape as its shadow reveals, for it eclipses the moon with the arc of a perfect circle.

Arc Circle Earth Fact
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I shall now recall to mind that the motion of the heavenly bodies is circular, since the motion appropriate to a sphere is rotation in a circle.

Appropriate Bodies Circle Circular
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The massive bulk of the earth does indeed shrink to insignificance in comparison with the size of the heavens.

Bulk Comparison Does Earth
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Yet if anyone believes that the earth rotates, surely he will hold that its motion is natural, not violent.

Anyone Believes Earth He
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We regard it as a certainty that the earth, enclosed between poles, is bounded by a spherical surface.

Between Certainty Earth Poles
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Of all things visible, the highest is the heaven of the fixed stars.
All Things Fixed Heaven Highest
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Near the sun is the center of the universe.

Center Near Sun Universe
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At rest, however, in the middle of everything is the sun.

Everything However Middle Rest
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In so many and such important ways, then, do the planets bear witness to the earth's mobility.

Bear Earth Important Many
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We do not know why we are born into the world, but we can try to find out what sort of a world it is - at least in its physical aspects.

Born World Find Physical aspect
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Equipped with his five senses, man explores the universe around him and calls the adventure Science.

Equipped Five sense Universe Adventure
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The history of astronomy is a history of receding horizons.

History Astronomy Receding Horizons
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Science is the one human activity that is truly progressive. The body of positive knowledge is transmitted from generation to generation.

Science Human activity Progressive Body
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The universe is unfolding as it should.
The universe Unfolding
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Past time is finite, future time is infinite.

Past time Future Infinite
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All nature is a vast symbolism: Every material fact has sheathed within it a spiritual truth.

Nature Vast symbolism Material Spiritual truth
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Observations always involve theory.

Observation Involve theory
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Wisdom cannot be directly transmitted, and does not readily accumulate through the ages.

Wisdom Transmitted Readily accumulate Ages
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Astronomy is something like the ministry. No one should go into it without a call. I got that unmistakable call, and I know that even if I were second-rate or third-rate, it was astronomy that mattered.

Astronomy Ministry Go Without call
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The great spirals, with their enormous radial velocities and insensible proper motions, apparently lie outside our Solar system.

Great spiral Radial velocities Motion
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I knew that even if I were second or third rate, it was astronomy that mattered.

Second Astronomy Mattered
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What man is happy? He who has a healthy body, a resourceful mind, and a docile nature.

Man Happy Healthy Resourceful mind
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The most difficult thing in life is to know yourself.

Most difficult thing In life Know yourself
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Nothing is more active than thought, for it travels over the universe, and nothing is stronger than necessity for all must submit to it.

More active Travels over Universe Stronger
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Time is the wisest of all things that are; for it brings everything to light.
Time Wisest All things To light
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Necessity is the strongest of things, for it rules everything.

Necessity Strongest Rules everything
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The past is certain, the future obscure.

The past Certain Future obscure
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God is the most ancient of all things, for he had no birth.

God Most ancient No birth
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Hope is the only good that is common to all men; those who have nothing else possess hope still.

Hope Good Common All men
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Intellect is the swiftest of things, for it runs through everything.

Intellect Swiftest All things Runs through
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Avoid doing what you would blame others for doing.

Avoid doing Blame others Doing
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One who is healthy in body, resourceful in soul and of a readily teachable nature.

Healthy Body Resourceful Soul
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A multitude of words is no proof of a prudent mind.

Multitude Words No proof Prudent mind
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Hope is the most universal of human possessions.

Hope Most universal Human possessions
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If there is neither excessive wealth nor immoderate poverty in a nation, then justice may be said to prevail.

Excessive wealth Immoderate poverty
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Many words are not proof of the wise man, because the sage only talk when it's needed, and the words are measured and corresponding with the need.

Many words Wise man Talk Needed
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We live not, in reality, on the summit of a solid earth but at the bottom of an ocean of air

We live Summit Solid earth Bottom
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Rise above oneself and grasp the world.

Rise Above Oneself Grasp
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Give me a lever long enough and a fulcrum on which to place it and I'll move the world

Give Lever Enough Fulcrum
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Man has always learned from the past. After all, you can't learn history in reverse!

Man Learned Past History
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Truth is the daughter of time, and I feel no shame in being her midwife.

Truth Time Feel Shame
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I believe only and alone in the service of Jesus Christ. In him is all refuge and solace.

Believe Service Christ Solace
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In theology we must consider the predominance of authority; in philosophy the predominance of reason.

Theology Authority Philosophy Reason
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Without proper experiments I conclude nothing.

Proper Experiments Conclude
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It may be well to wait a century for a reader, as God has waited six thousand years for an observer.

Wait Reader God Observer
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Planets move in ellipses with the Sun at one focus.

Planets Ellipses Sun Focus
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Eyesight should learn from reason.

Eyesight Learn Reason
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The Earth is round, and is inhabited on all sides, is insignificantly small, and is borne through the stars.

Earth Inhabited Borne Stars
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Nature uses as little as possible of anything.

Nature Uses Possible Anything
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The Creator, the fountain of all wisdom, the approver of perpetual order, the eternal and superessential spring of geometry and harmonics.

Creator Wisdom Order Harmonics
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