From 1869 to 1872, he was employed as an Assistant in Harvard's astronomical observatory, doing important work on determining the brightness of stars and the shape of the Milky Way.

From an astronomical view, the equinoxes and solstices would be the middle of the respective seasons, but a variable seasonal lag means that the meteorological start of the season, which is based on average temperature patterns, occurs several weeks later than the start of the astronomical season.

From the observed X-ray spectrum, combined with spectral emission results for other wavelength ranges, an astronomical model addressing the likely source of X-ray emission can be constructed.

From their minimum separation of 430 astronomical units, the period is at least 1, 500 years, and may be much longer.

From this Whiggish perspective, Ptolemy would be criticized because his astronomical system placed the Earth at the center of the universe while Aristarchus would be praised because he placed the Sun at the center of the solar system.

From these, using astronomical theory, it calculates the direction of the sun as seen from the mirror, e. g. its compass bearing and angle of elevation.

From 1902 to 1903 during his studies he was an assistant at the Urania astronomical observatory.

When it became apparent that the universe is not static, but expanding, Einstein was quick to discard this additional term ; prematurely, as we know today: From about 1998 on, a steadily accumulating body of astronomical evidence has shown that the expansion of the universe is accelerating in a way that suggests the presence of a cosmological constant or, equivalently, of a dark energy with specific properties that pervades all of space.

From 2004 to 2010, approximately 8 % of MMT observing time was made accessible to the entire astronomical community via the US National Science Foundation's Telescope System Instrumentation Program ( TSIP ), administered by the National Optical Astronomy Observatory ( NOAO ).

From the other perspective, Alcott's unique teaching ideas created an environment which produced two famous daughters in different fields, in a time when women were not commonly encouraged to have independent careers.

From a modern perspective these figures may seem small, but in the world of Greek city-states Athens was huge: most of the thousand or so Greek cities could only muster 1000 – 1500 adult male citizens and Corinth, a major power, had at most 15, 000 but in some very seldom cases more.

From a subjective perspective, antipsychotics heavily influence one's perceptions of pleasurable sensations, causing a severe reduction in feelings of desire, motivation, pensive thought, and awe.

From a geostructural perspective the Azores is located above an active triple junction between three of the world's large tectonic plates ( the North American Plate, the Eurasian Plate and the African Plate ), a condition that has translated into the existence of many faults and fractures in this region of the Atlantic.

From a sociological and demographic perspective, the Big Brother franchise allows the opportunity for analysis of how people react when forced into close confinement with people who lie outside their comfort zone, since they may hold different opinions or ideals from other contestants, or simply belong to a different group of people than a contestant normally interacts with.

From an articulatory perspective this terminology is incorrect, as breathy voice is a different type of phonation from aspiration.

From one perspective, the copula always relates two things as subsets.

From a popular perspective, the term Chicano became widely visible outside of Chicano communities during the American civil rights movement.

From a geological perspective, it did not take long for mammals and birds to greatly diversify in the absence of the large reptiles that had dominated during the Mesozoic.

From the Orthodox perspective, Conservative Jews are considered just as Jewish as Orthodox Jews, but they are viewed as misguided, consistent violators of halakha.

From the time of Deng Xiaoping onwards, there has been a drift of focus towards a Marxist-inspired, moderated by Conficianism, nationalist perspective, and consideration of China's contemporary international status became of paramount importance in historical studies.

From this perspective, much literary critical theory, since it is focused on interpretation and explanation rather than on social transformation, would be regarded as positivistic or traditional rather than critical theory in the Kantian or Marxian sense.

From the perspective of the rotating frame, the additional force terms are experienced just like the real external forces and contribute to the apparent acceleration.

From the perspective of the developing world, the benefits of forest as carbon sinks or biodiversity reserves go primarily to richer developed nations and there is insufficient compensation for these services.

From this perspective, everyone speaks a dialect.

From a neurological perspective, different types of writing system, for example alphabetic as compared to logographic writing systems, require different neurological pathways in order to read, write and spell.

From a theoretical perspective, both tao and dao transliterations if pronounced according to English spelling conventions are equally close to, or far from, the Standard Chinese pronunciation of 道.

From another perspective, the farmer and the miller both reduce a risk and acquire a risk when they sign the futures contract: the farmer reduces the risk that the price of wheat will fall below the price specified in the contract and acquires the risk that the price of wheat will rise above the price specified in the contract ( thereby losing additional income that he could have earned ).

From a more advanced perspective, each of these definitions may be interpreted as giving the unique analytic continuation of e < sup > x </ sup > to the complex plane.

From a classical perspective, the electromagnetic field can be regarded as a smooth, continuous field, propagated in a wavelike manner ; whereas from the perspective of quantum field theory, the field is seen as quantized, being composed of individual particles.

From the Eastern Orthodox perspective, a council is accepted as being ecumenical if it is accepted by the Eastern Orthodox church at large – clergy, monks and assembly of believers.

From an economic perspective environmental laws may be understood as concerned with the prevention of present and future externalities, and preservation of common resources from individual exhaustion.

From a more modern perspective, Haeckel's drawings were the beginnings of the field of evolutionary developmental biology ( evo-devo ).

From the 1960s to present day educational psychology has switched from a behaviorist perspective to a more cognitive based perspective because of the influence and development of cognitive psychology at this time.

From Gottingen ( 1801 ) where he stayed for 10 days, he wrote, `` The first question asked everywhere is about galvanism.

From the earliest days of the motor car industry, before the A.L.A.M. was established, patent infringement loomed as a serious and vexing problem.

From his eastern-origin Apollo brought the art of inspection from " symbols and omina " ( σημεία και τέρατα: semeia kai terata ), and of the observation of the omens of the days.

One tablet from this period reads, "( From the earliest days ) no-one had made a statue of lead, ( but ) Rimush king of Kish, had a statue of himself made of lead.

:" From Skåne ( Sconia ) of the Danes one reaches Sigtuna ( Sictonam ) or Birka after five days at sea, for they are indeed alike.

From the first days of the expansion of the British colonies from the coast of North America into the heartland of the continent, a recurring problem was that of transportation between the coastal ports and the interior.

From at least the days of the Greek Philosophers, the relationship between faith and reason has been hotly debated.

From the early days of the Republic, ten years of military service were a citizen's duty and a prerequisite for election to public office.

From Tasarahla, a Masufa scout was sent ahead to the oasis town of Oualata, where he arranged for water to be transported a distance of four days travel where it would meet the thirsty caravan.

From his earliest days, Audubon had an affinity for birds.

From those days, only the name Mauritius has remained.

From Elim they set out again and after 45 days they reached the wilderness of Sin between Elim and Sinai.

From 1968 to 1978, he and Paul Samuelson participated in the Economics Cassette Series, a biweekly subscription series where the economist would discuss the days ' issues for about a half hour at a time.

From excavated tally sticks, researchers have deduced that people counted days in relation to the Moon's phases as early as the Paleolithic age.

From the Pole, they travelled towards Svalbard but, due to the unstable nature of the ice, ended their crossing at the ice edge after drifting south on an ice floe for 99 days.

From early days, clothes-free beaches and other types of ad-hoc nudist activities have served those who wish to take part in naturist activities without belonging to any clubs.

From the 1930s through the late 1950s, " Pepsi-Cola Hits The Spot " was the most commonly used slogan in the days of old radio, classic motion pictures, and later television.

From those days stem the Stockholms Olympiastadion which has since hosted numerous sports events, notably football and athletics.

From a pro-independence supporter's point of view, the movement for Taiwan independence began under Qing rule in the 1680s which led to a well known saying those days, " Every three years an uprising, every five years a rebellion ".

From Tang times until the closing days of the Qing Dynasty in 1911, scholar officials functioned often as intermediaries between the grassroots level and the government.

From the publication of his first paper in 1929, during his days as a student, until his death, Ulam was constantly writing on mathematics.

From the beginning days

From his first days as a commander, Patton strongly emphasized the need for armored forces to stay in constant contact with the enemy, concluding that aggressive, fast-moving mechanized and armored forces disrupted enemy defensive preparations while presenting less of a target to enemy gunners.