Scelta multipla
Which of the following is the correct SI unit for ?
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1. Intro to Physics Units
Introduction to Units
Scelta multipla
Sirius is one of the brightest stars visible from Earth. Approximately how far away is Sirius from Earth in (astronomical units)?
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Understand that the distance to stars like Sirius is often given in light years or parsecs, but the problem asks for the distance in astronomical units (AU).
Recall that 1 light year is the distance light travels in one year, and 1 AU is the average distance from the Earth to the Sun.
Find the distance to Sirius in light years, which is approximately 8.6 light years.
Use the conversion factor: 1 light year is approximately equal to 63,240 AU.
Multiply the distance in light years by the number of AU per light year to get the distance to Sirius in AU: \(\text{Distance in AU} = 8.6 \times 63,240\).
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