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单词 astronomical unit
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Examples ofastronomical unit

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Since we are talking about astronomical observations, it is convenient to use theastronomicalunitof apparent brightness which is the magnitude.
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This has led to calls to abandon theastronomicalunitas a unit of measurement.
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The measurements of the secular variations of theastronomicalunitare not confirmed by other authors and are quite controversial.
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If viewed from a distance of 1astronomicalunit, it would span an angular diameter of 35 and shine at magnitude 38.
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The nameastronomicalunitappears first to have been used in 1903.
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Depending on the value assumed for theastronomicalunit, this yields the speed of light as just a little more than 300,000 kilometres per second.
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At its core is a shield world, contained within slipstream space, that is approximately oneastronomicalunitin diameter.
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A particle of negligible mass, that orbits a body of 1 solar mass in this period, has a mean axis for its orbit of 1astronomicalunitby definition.
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Aten was the first asteroid found to have a semi-major orbital axis of less than oneastronomicalunit.
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The gap between the two rings is 3 astronomical units.
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These two components are more than 500 astronomical units apart, with an estimated orbital period of approximately 3600 years.
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Using the stellar mass and period, he calculated semimajor axis as 0.911 astronomical units.
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The inner ring extends from a distance of 1.5 to 2 astronomical units from the barycenter of the central binary.
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At its closest, it is only 0.26 astronomical units away from the sun, having the 32nd closest perihelion of any minor planet.
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The two stars are 0.68 arcseconds, or at least 12 astronomical units, apart and complete one orbit every 33.99 years.
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The pair are separated by a mean distance of roughly 4 astronomical units.
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Its two components are separated by 0.05 arcseconds, or at least 1.4 astronomical units, and have an orbital period in excess of 14 years.
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The two stars are separated by only 0.1 astronomical units, so their shapes are modified by mutual tidal interaction.
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By convention, exozodiacal dust refers to the innermost and hottest part of these debris disks, within a few astronomical units from the star.
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The two stars are separated by 0.15 arcseconds on the sky, which puts them approximately 15 astronomical units apart.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

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更新时间:2025/3/10 11:53:43