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"My amateur interest in astronomy brought out the term 'magnitude,' which is used for the brightness of a star."
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"What emerged, of course, was that the magnitude scale presupposed that all earthquakes were alike except for a constant scaling factor. And this proved to be closer to the truth than we expected."
Truth
"As seismologists gained more experience from earthquake records, it became obvious that the problem could not be reduced to a single peak acceleration. In fact, a full frequency of vibrations occurs."
Experience
"This is very similar to astronomy where different magnitudes are assigned to the brightness of an astronomical object, depending on the range of wavelengths being measured."
Astronomy
"I usually point out that most loss of life and property has been due to the collapse of antiquated and unsafe structures, mostly of brick and other masonry."
Life
"If one introduces the concept of energy of an earthquake then that is a theoretically derived quantity."
Energy
"If the assumptions used in calculating energy are changed, then this seriously affects the final result, even though the same body of data might be used."
Body
"In every area of the world where there is earthquake risk, there are still many buildings of this type; it is very frustrating to try to get rid of them."
Risk
"Intensity like signal strength will generally fall off with distance from the source, although it also depends on the local conditions and the pathway from the source to the point."
Strength
"Incidentally, the usual designation of the magnitude scale to my name does less than justice to the great part that Dr. Gutenberg played in extending the scale to apply to earthquakes in all parts of the world."
Justice
"I suggested that we might compare earthquakes in terms of the measured amplitudes recorded at these stations, with an appropriate correction for distance."
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"A galaxy is composed of gas and dust and stars - billions upon billions of stars. Every star may be a sun to someone."
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Personal Development
"Stars are fires that burn for thousands of years. Some of them burn slow and long, like red dwarfs. Others-blue giants-burn their fuel so fast they shine across great distances, and are easy to see. As they start to run out of fuel, they burn helium, grow even hotter, and explode in a supernova. Supernovas, they're brighter than the brightest galaxies. They die, but everyone watches them go."
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Personal Development
"This sight... is by far the noblest astronomy affords."
Author Name
Personal Development
"This is very similar to astronomy where different magnitudes are assigned to the brightness of an astronomical object, depending on the range of wavelengths being measured."
Author Name
Personal Development
"Did you say the stars were worlds, Tess?""Yes.""All like ours?""I don't know, but I think so. They sometimes seem to be like the apples on our stubbard-tree. Most of them splendid and sound - a few blighted.""Which do we live on - a splendid one or a blighted one?""A blighted one."
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Personal Development
"Astronomy's much more fun when you're not an astronomer."
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Personal Development
"From the first moment I handled my lens with a tender ardour."
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Personal Development
"But when researchers at Bell Labs discovered that static tends to come from particular places in the sky, the whole field of radio astronomy opened up."
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Personal Development
"Until very recently, the heavenly bodies have been investigated only with reference to their position and their laws of motion, and a quarter of a century ago astronomy was little more than celestial topography."
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Personal Development
"It's like having astronomy without knowing where the stars are."
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Personal Development
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