Understanding Astronomical Units (AU)

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What is the distance from the Sun to Neptune in light years?

0.00062 light years

30 light years

0.000015 light years

0.00019 light years (correct)

How is one light-year defined?

The distance light travels in one hour

The distance light travels in one year (correct)

The distance light travels in one minute

The distance light travels in one day

What is the distance from Earth to Alpha Centauri in parsecs?

4.2 parsecs

3.65 parsecs

1.29 parsecs (correct)

0.0000048 parsecs

What is the conversion of parsecs to light-years?

3.3 light-years Signup and view all the answers

Why do astronomers use different units of distance like AU, light-years, and parsecs?

To express distances over a wide range of scales conveniently Signup and view all the answers

What does the term 'aphelion' refer to in relation to the Earth's orbit around the Sun?

The furthest distance of Earth from the Sun Signup and view all the answers

What is the perihelion in astronomical terms for the Earth's orbit?

0.938 AU Signup and view all the answers

How is an Astronomical Unit (AU) defined in relation to the Earth's orbit?

The average orbital distance of the Earth Signup and view all the answers

Why are distances within the solar system typically given in terms of AU?

To compare distances on a more uniform scale Signup and view all the answers

How can the mean orbital distance of any planet be expressed using perihelion and aphelion values?

By finding the average of perihelion and aphelion Signup and view all the answers

Understanding Astronomical Units (AU)

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Questions and Answers

What is the distance from the Sun to Neptune in light years?

How is one light-year defined?

What is the distance from Earth to Alpha Centauri in parsecs?

What is the conversion of parsecs to light-years?

Why do astronomers use different units of distance like AU, light-years, and parsecs?

What does the term 'aphelion' refer to in relation to the Earth's orbit around the Sun?

What is the perihelion in astronomical terms for the Earth's orbit?

How is an Astronomical Unit (AU) defined in relation to the Earth's orbit?

Why are distances within the solar system typically given in terms of AU?

How can the mean orbital distance of any planet be expressed using perihelion and aphelion values?

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