“I find that any luminous body when seen through a dense and thick mist diminishes in proportion to its distance from the eye. Thus it is with the sun by day, as well as the moon and the other eternal lights by night. And when the air is clear, these luminaries appear larger in proportion as they are farther from the eye.”

— Leonardo Da Vinci

The Notebooks of Leonardo da Vinci (1883), IV Perspective of Disappearance

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Leonardo Da Vinci 363

Italian Renaissance polymath 1452–1519

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“A luminous body when obscured by a dense atmosphere will appear smaller; as may be seen by the moon or sun veiled by fogs.”

Leonardo Da Vinci (1452–1519) Italian Renaissance polymath

The Notebooks of Leonardo da Vinci (1883), IV Perspective of Disappearance

“[Hypotheses]
1. That the Moon receives its light from the sun.
2. That the earth is in the relation of a point and centre to the sphere in which the moon moves.
3. That, when the moon appears to us halved, the great circle which divides the dark and the bright portions of the moon is in the direction of our eye.
4. That, when the moon appears to us halved, its distance from the sun is then less than a quadrant by one-thirtieth of a quadrant.
5. That the breadth of the (earth's) shadow is (that) of two moons.
6. That the moon subtends one fifteenth part of a sign of the zodiac.”

Aristarchus of Samos ancient Greek astronomer and mathematician

Note "is less than a quadrant..." is less than 90° by l/30th of 90° or 3°, and is therefore equal to 87°.
On the Sizes and Distances of the Sun and the Moon (c. 250 BC)

“The mind, in proportion as it is cut off from free communication with nature, with revelation, with God, with itself, loses its life, just as the body droops when debarred from the air and the cheering light from heaven.”

William Ellery Channing (1780–1842) United States Unitarian clergyman

"Remarks on the Character and Writings of Fénelon" (1843)

“A luminous body will appear more brilliant in proportion as it is surrounded by deeper shadow.”

Leonardo Da Vinci (1452–1519) Italian Renaissance polymath

The Notebooks of Leonardo da Vinci (1883), IV Perspective of Disappearance

“The heath and changes of weather were quite blotted out from their eyes for the present. They were enclosed in a sort of luminous mist, which hid from them surroundings of any inharmonious colour, and gave to all things the character of light. When it rained they were charmed, because they could remain indoors together all day with such a show of reason; when it was fine they were charmed, because they could sit together on the hills. They were like those double stars which revolve round and round each other, and from a distance appear to be one.”

Thomas Hardy book The Return of the Native

Bk. IV, ch. 1
The Return of the Native (1878)

“The quantity of action is the product of the mass of the bodies times their speed and the distance they travel. When a body is transported from one place to another, the action is proportional to the mass of the body, to its speed and to the distance over which it is transported.”

Pierre Louis Maupertuis (1698–1759) French mathematician, philosopher and man of letters

Les Loix du Mouvement et du Repos, déduites d'un Principe Métaphysique (1746)

“If we suppose the distance of the fixed stars from the sun to be so great that the diameter of the earth's orbit viewed from them would not subtend a sensible angle, or which amounts to the same, that their annual parallax is quite insensible; it will then follow that a line drawn from the earth in any part of its orbit to a fixed star, will always, as to sense, make the same angle with the plane of the ecliptic, and the place of the star, as seen from the earth, would be the same as seen from the sun placed in the focus of the ellipsis described by the earth in its annual revolution, which place may therefore be called its true or real place.
But if we further suppose that the velocity of the earth in its orbit bears any sensible proportion to the velocity with which light is propagated, it will thence follow that the fixed stars (though removed too far off to be subject to a parallax on account of distance) will nevertheless be liable to an aberration, or a kind of parallax, on account of the relative velocity between light and the earth in its annual motion.
For if we conceive, as before, the true place of any star to be that in which it would appear viewed from the sun, the visible place to a spectator moving along with the earth, will be always different from its true, the star perpetually appearing out of its true place more or less, according as the velocity of the earth in its orbit is greater or less; so that when the earth is in its perihelion, the star will appear farthest distant from its true place, and nearest to it when the earth is in its aphelion; and the apparent distance in the former case will be to that in the latter in the reciprocal proportion of the distances of the earth in its perihelion and its aphelion. When the earth is in any other part of its orbit, its velocity being always in the reciprocal proportion of the perpendicular let fall from the sun to the tangent of the ellipse at that point where the earth is, or in the direct proportion of the perpendicular let fall upon the same tangent from the other focus, it thence follows that the apparent distance of a star from its true place, will be always as the perpendicular let fall from the upper focus upon the tangent of the ellipse. And hence it will be found likewise, that (supposing a plane passing through the star parallel to the earth's orbit) the locus or visible place of the star on that plane will always be in the circumference of a circle, its true place being in that diameter of it which is parallel to the shorter axis of the earth's orbit, in a point that divides that diameter into two parts, bearing the same proportion to each other, as the greatest and least distances of the earth from the sun.”

James Bradley (1693–1762) English astronomer; Astronomer Royal

Miscellaneous Works and Correspondence (1832), Demonstration of the Rules relating to the Apparent Motion of the Fixed Stars upon account of the Motion of Light.

“I ask how far away the eye can discern a non-luminous body, as, for instance, a mountain. It will be very plainly visible if the sun is behind it; and could be seen at a greater or less distance according to the sun's place in the sky.”

Leonardo Da Vinci (1452–1519) Italian Renaissance polymath

The Notebooks of Leonardo da Vinci (1883), IV Perspective of Disappearance

“Water were your limbs
And the fire was your hair
And then the moon caught your eye,
and you rose through the air.
Well if you've seen true light,
then this is my prayer:
Will you call me
When you get there?”

Joanna Newsom (1982) American musician

Cosmia
Ys (2006)

“Among all the luminaries shining in the sky, the sun is the chief, and in the Brahma-samhita the sun is accepted as the glowing eye of the Supreme Lord. There are fifty varieties of wind blowing in space, and of these winds the controlling deity, Marici, represents Krishna. Among the stars, the Moon is the most prominent at night, and thus the Moon represents Krishna. It appears from this verse that the Moon is one of the stars; therefore the stars that twinkle in the sky also reflect the light of the sun. The theory that there are many suns within the universe is not accepted by Vedic literature. The sun is one, and as by the reflection of the sun the Moon illuminates, so also do the stars. Since Bhagavad-gita indicates herein that the Moon is one of the stars, the twinkling stars are not suns but are similar to the Moon.”

A.C. Bhaktivedanta Swami Prabhupada (1896–1977) Indian guru

Bhagavad-Gita As It Is, Bhaktivedanta Book Trust, 1972. Chapter 10, verse 21, purport. Vedabase http://www.vedabase.com/en/bg/10/21
Quotes from Books: Loving God, Quotes from Books: Regression of Science

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Leonardo Da Vinci 363

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