If the occulting object has an atmosphere, however, some of the luminosity of the star can be refracted into the volume of the umbra.

Giorgio Vasari quotes Michelangelo as saying, " If there is some good in me, it is because I was born in the subtle atmosphere of your country of Arezzo.

If a white dwarf has a close companion star that overflows its Roche lobe, the white dwarf will steadily accrete gas from the companion's outer atmosphere.

If an orbit is about a planetary body with significant atmosphere, its orbit can decay because of drag.

If enough hydrogen sulfide accumulates in an anoxic zone, the gas can rise into the atmosphere.

If Earth were smaller, a thinner atmosphere would allow temperature extremes, thus preventing the accumulation of water except in polar ice caps ( as on Mars ).

If there were no geomagnetic field and no additional atoms in the lower atmosphere for additional collisions, the electrons would continue to travel downward with an average current density in the stratosphere of about 48 amperes per square metre.

If directional shear between the surface and the height in the atmosphere at which the barometric pressure measures is greater than 60 degrees, nothing more than flurries can be expected.

If this is the case, the continuous change in social structures could bring about a change in social capital, which can cause changes in community atmosphere.

If enough instability is present in the atmosphere, this process will continue long enough for cumulonimbus clouds to form, which support lightning and thunder.

If there is enough solar energy in the atmosphere, however ( on a hot summer's day, for example ), the moisture from one storm cell can evaporate rapidly — resulting in a new cell forming just a few miles from the former one.

If the Earth is assumed to be a sphere with no atmosphere then the distance to the horizon can easily be calculated.

If Byzantine literature is the expression of the intellectual life of the Byzantine Greeks during the Christian Middle Ages, then it is a multiform organism, combining Greek and Christian civilization on the common foundation of the Roman political system, set in the intellectual and ethnographic atmosphere of the Near East.

If a white dwarf has a close companion star that overflows its Roche lobe, the white dwarf will steadily accrete gases from the star's outer atmosphere.

If the Earth were a perfect sphere and there were no atmosphere, the radio horizon would be a circle.

If the firm also pollutes the atmosphere when it makes steel, however, and if it is not forced to pay for the use of this resource, then this cost will be borne not by the firm but by society.

If enough instability is present in the atmosphere, this process will continue long enough for cumulonimbus clouds to form, which support lightning and thunder.

If the atmosphere is thick enough, a single pass through it can be sufficient to slow a spacecraft as needed.

If the peat decayed, carbon dioxide would be released to the atmosphere, contributing to global warming.

If a spacecraft gets too far into the atmosphere, the energy lost to friction can exceed that gained from the planet's gravity.

If an asteroid breaks into fragments, any fragment larger than 35 m across would not burn up in the atmosphere and itself could impact Earth.

If we also require that the enclosed mass is equal to the known mass of the Earth ( including atmosphere ) GM = 3986005 × 10 < sup > 8 </ sup > m < sup > 3 </ sup >· s < sup >− 2 </ sup >, we obtain for the potential at the reference ellipsoid:

If high conductivity copper needs to be welded or brazed or used in a reducing atmosphere, then oxygen-free high conductivity copper ( CW008A or ASTM designation C10100 ) may be used.

If the light does not interact with the atmosphere, it is called direct radiation and is what you see if you were to look directly at the Sun.

If he had married her, he'd have been asking for trouble.

If the bluff failed and they ran into trouble, Brannon had told the others, they would withdraw -- and he would come after his son another time.

If he wondered whether the attackers would allow him to pull away unmolested, he had his answer a moment later.

If the Union conceded this to them, the same right must be conceded to each remaining state whenever it saw fit to secede: This would destroy the federal balance between it and the states, and in the end sacrifice to the sovereignty of the states all the liberty the citizens had gained by their Union.

If any had escaped expulsion by hiding, they certainly would not frequent the market-place.

If a child had a single drop of Negro blood, he would revert to the ancestral line which, except as slaves under a superior race, had not made one step of progress in 3,000 years.

If he had been `` liquidated '' in some way, he would have become a martyr, a rallying point for people who shared his ideas.

If in any one calculation Ptolemy had had to invoke 83 epicycles all at once, while Copernicus never required more than one third this number, then ( in the sense obvious to Margenau ) Ptolemaic astronomy would be simpler than Copernican.

If you had screamed right there in the street where we stood, I could not have felt more fear.

If to be innocent is to be helpless, then I had been -- as are we all -- helpless at the start.

If Hammarskjold had not wanted the list disposed of in this manner, and if Bang-Jensen had not wanted it -- who had ordered it??

If Gorton wanted peace and quiet for his complicated meditations this is where he should have had it.

If his circumspection in regard to Philip's sensibilities went so far that he even refused to grant a dispensation for the marriage of Amadee's daughter, Agnes, to the son of the dauphin of Vienne -- a truly peacemaking move according to thirteenth-century ideas, for Savoy and Dauphine were as usual fighting on opposite sides -- for fear that he might seem to be favoring the anti-French coalition, he would certainly never take the far more drastic step of ordering the return of Gascony to Edward, even though, as he admitted to the English ambassadors, he had been advised that the original cession was invalid.

If this capacity had not failed them, they would see that their enemy has made a disastrous miscalculation.

If he had had a son, he would tell him, `` Gather ye rosebuds while ye may This same flower that smiles today tomorrow will be dying ''.

If he had any worries, it was only the small ones, about Mother in New York, and his daughter Edwina and what she might be doing at this hour, with her Aunt Asia, in Philadelphia.

If we had, then one of us would have had to go instead.

If he had income other than wages subject to withholding, he may be required to file Form 1040.

If our SAC bombers were, today, capable of surviving a surprise missile attack and because of infinite dispersion or long endurance had the capability to strike at Russia again, and again, and again, those bombers would unquestionably assure our military dominance.