Because boron is produced entirely by cosmic ray spallation and not by stellar nucleosynthesis, it is a low-abundance element in both the solar system and the Earth's crust.

Because the number of days in the tropical year is not a whole number, a solar calendar must have a different number of days in different years.

Because the Julian calendar's implicit solar year has drifted further over the centuries than those of the Gregorian or Hebrew calendars, Julian Easter is a lunation later than Gregorian Easter in five years out of nineteen, namely years 3, 8, 11, 14, and 19 of the Christian cycle.

Because it is warm, the surface radiates far IR thermal radiation that consists of wavelengths that are predominantly much longer than the wavelengths that were absorbed ( the overlap between the incident solar spectrum and the terrestrial thermal spectrum is small enough to be neglected for most purposes ).

Because of the limited techniques currently available to detect extrasolar planets, many of those found to date have been of a size associated, in our solar system, with gas giants.

Because of the roughly eleven-day difference between twelve lunar months and one solar year, the length of the Hebrew calendar year varies in the repeating 19-year Metonic cycle of 235 lunar months, with the intercalary month added according to defined rules every two or three years, for a total of 7 times per 19 years.

Because of the nonzero planetary masses and resulting perturbations, Kepler's laws apply only approximately and not exactly to the motions in the solar system.

Because of its relative nuclear instability, lithium is less common in the solar system than 25 of the first 32 chemical elements even though the nuclei are very light in atomic weight.

Because there are about twelve lunations ( synodic months ) in a solar year, this period ( 354. 37 days ) is sometimes referred to as a lunar year.

Because < sup > 60 </ sup > Fe has such a long half-life, its persistence in materials in the solar system at high enough concentrations may have generated observable variations in the isotopic composition of < sup > 60 </ sup > Ni.

Because of the similarity between solar-induced geomagnetic storms and nuclear E3, it has become common to refer to solar-induced geomagnetic storms as " solar EMP.

Because the Earth's orbit around the sun is elliptical, and because of the obliquity of the Earth's axis relative to the plane of the orbit ( the ecliptic ), the apparent solar day varies a few dozen seconds above or below the mean value of 24 hours.

Because moons in retrograde orbits cannot have formed out of the same region of the solar nebula as the planets they orbit, it must have been captured from elsewhere.

Because the Qattara Depression is in a very hot dry region with very little cloud cover the water released at the level would spread out from the release point across the basin and evaporate from solar influx.

Because most planets ( except Mercury ), and many small solar system bodies have orbits with small inclinations to the ecliptic, it is convenient to use it as the

Because the Earth orbits the Sun once a year, the sidereal time at any one place at midnight will be about four minutes later each night, until, after a year has passed, one additional sidereal day has elapsed compared to the number of solar days that have gone by.

Because of its symmetrical shape, Vanguard 1 was used by experimenters for use in determining upper atmospheric densities as a function of altitude, latitude, season, and solar activity.

Because a typical lunisolar calendar has a year made up of a whole number of lunar months, it can't indicate the position of Earth on its revolution around the sun as well as a pure solar calendar can.

Because the solar EUV cannot be monitored from the ground, the joint NASA-ESA Solar and Heliospheric Observatory ( SOHO ) spacecraft was launched and has provide EUV images of the Sun from 1995 to the present.

Because the Earth follows an elliptical orbit around the Sun, the solar mass can be computed from the equation for the orbital period of a small body orbiting a central mass.

Because of the proper and improper motions of the sun, one solar day ( the time between two upper culminations of the sun ) is longer than one sidereal day ( the time between two like culminations of any fixed star ).

Because the solar wind particles are expected to be embedded in the wafers, whereas the contaminating dirt is likely just to lie on the surface, it may be possible to separate the dirt from the samples.

Because the ancient Egyptian year was almost a quarter of a day shorter than the solar year and stellar events therefore " wandered " through the calendar, it has been referred to as the annus vagus, or " wandering year ".

Because shuttlecock flight is affected by wind, competitive badminton is played indoors.

Because it travels with the wind, it can affect sparsely populated areas as well.

Because of lack of wind, the warships could not sail to Troy.

Because they are wind pollinated and they have weak internal barriers to hybridization, hybridization produces functional seeds and fertile hybrid offspring.

Because of its topography and prevailing winds, Judith Gap is the site of one of the most ambitious wind power projects in the United States.

Because of the wind direction, most industrial complexes were located in the southern and south-eastern areas.

Because of Whiteman ’ s advertisement of the concert at Aeolian Hall, and the orchestration for primarily wind instruments, the audience was predisposed to listen to the piece as a jazz work.

Because of the inaccessibility of the terrain there was really no other way to haul the wind blown tree trunks from the affected areas.

For example the simple sentence: " Because the wind was gusting the leaves were swirling on the porch " is hypotaxis.

" Because " x " ( the wind gusts ) then " y "( the leaves swirl on the porch ) occurs.

Because of its youth, Epsilon Eridani has a higher level of magnetic activity than the present-day Sun, with a stellar wind 30 times as strong.

Because of its long, narrow shape, the lake exhibits a variety of interesting wind and wave effects, including temporary water level rises of up to one metre in height at its southern shore, a process called seiche.

Because it tends to migrate close to shore — generally within of land — it may be detrimentally affected by the construction of near-shore wind farms ; studies indicate a high level of avoidance of wind farm areas, though deaths due to direct strikes with the turbines appear to be uncommon.

Because of the high speeds required for flight, procellariids need to either run or face into a strong wind in order to take off.

Because it sits " on " the water, rather than " in " it, they can easily be carried by currents and the wind.

Because these floodplains consist of sediment containing a high content of glacially ground flour-like silt and clay, they were highly susceptible to winnowing of their silts and clays by the wind.

Because of the exposed situation, wind speeds of up to 130 km / h are possible throughout the year.

Because wind is an intermittent power source and may inconveniently deliver large amounts of power during periods of low electric demand, pumped storage facilities are desirable to have on the same grid with large-scale wind farms.

Because of his fear of wind and light, his office was gloomy and lacked any ventilation.

Because the active runway is chosen to meet the wind at the nearest angle ( with take-offs and landings upwind ), the pattern orientation also depends on wind direction.