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### Top 10 Results

1. **An ‘Astronomical Unit’ is defined as the mean distance between which two objects in space? **

The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun and equal to about 150 million kilometres (93 million miles). However, that distance varies as Earth orbits the Sun, from a maximum to a minimum and back again once a year.Originally conceived as the average of Earth’s aphelion and perihelion, since 2012 it has been defined as exactly …

https://en.wikipedia.org/wiki/Astronomical_unit

2. **Astronomical Unit**

Astronomical unit, a unit of length effectively equal to the average, or mean, distance between Earth and the Sun, defined as 149,597,870.7 km (92,955,807.3 miles). The astronomical unit provides a convenient way to express and relate distances of objects in the solar system and to carry out astronomical calculations.

https://www.britannica.com/science/astronomical-unit

3. **Astronomical Unit**

Definition of astronomical unit. For general reference, we can say that one astronomical unit (AU) represents the mean distance between the Earth and our sun. An AU is approximately 93 million …

https://earthsky.org/space/what-is-the-astronomical-unit

4. **Parallax**

To measure the distance of a star, astronomers use a baseline of 1 astronomical unit (AU), which is the average distance between Earth and the sun, about 93 million miles (150 million kilometers).

https://www.space.com/30417-parallax.html

5. **Astronomical Unit**

astronomical unit: An Astronomical Unit is the mean distance between the Earth and the Sun. In 2012, the International Astronomical Union defined the distance to be 149,597,870,700 meters. All distances in astronomy depend on this value because it is key to deriving distances using parallax.

https://en.mimi.hu/astronomy/astronomical_unit.html

6. **An ‘Astronomical Unit’ is defined as the mean distance between which two objects in space? **

The AU is defined as the average distance between the Earth and the Sun. It is approximately 150 million km (93 million miles). Mercury can be said to be about 1/3 of an AU from the Sun and Pluto averages about 40 AU from the Sun. The AU, however, is not big enough of a unit when we start talking about distances to objects outside our solar system.

https://starchild.gsfc.nasa.gov/docs/StarChild/questions/question19.html

7. **An ‘Astronomical Unit’ is defined as the mean distance between which two objects in space? **

For most space objects, we use light-years to describe their distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). That is a 6 with 12 zeros behind it! Looking Back in Time. When we use powerful telescopes to look at distant objects in space, we are actually looking …

https://spaceplace.nasa.gov/light-year/en/

8. **An ‘Astronomical Unit’ is defined as the mean distance between which two objects in space? **

To appreciate the distance to the Oort Cloud, it’s helpful to set aside miles and kilometers and instead use the astronomical unit, or AU — a unit defined as the distance between Earth and the Sun, with 1 AU being roughly 93 million miles or 150 million kilometers.

https://solarsystem.nasa.gov/solar-system/oort-cloud/in-depth/

9. **An ‘Astronomical Unit’ is defined as the mean distance between which two objects in space? **

After hundreds of years of approximating the distance between the Earth and Sun, the Astronomical Unit was recently redefined as a set value rather than a mathematical equation.

https://www.space.com/17733-earth-sun-distance-astronomical-unit.html

10. **An ‘Astronomical Unit’ is defined as the mean distance between which two objects in space? **

The sidereal period of a planet is defined as the time between two successive. passages of the planet in front of a particular point in the sky … or 1 astronomical unit, is defined as the. mean distance between the Sun and Earth. An astronomical unit (AU) is a unit of.

https://quizlet.com/324194659/chapter-2-astronomy-flash-cards/

### News results

1. **Potentially hazardous asteroid 2020ND bigger than London Eye to fly past Earth this week: NASA**

The National Aeronautics and Space Administration … 0.034 astronomical units (AU) or 5,086,327 kilometres of Earth, much farther than the Moon which is an average of 500,000 kilometres away. According to the Independent, there are two objects–2016 …

https://www.msn.com/en-in/news/techandscience/potentially-hazardous-asteroid-2020nd-bigger-than-london-eye-to-fly-past-earth-this-week-nasa/ar-BB16XYWK

Published Date: 2020-07-20T14:13:59.0000000Z

### BING based on video search results

1 Distances: Crash Course Astronomy #25 |

How do astronomers make sense out of the vastness of space? How do they study things so far away? Today Phil talks about distances, going back to early astronomy. Ancient Greeks were able to find the size of the Earth, and from that the distance to and the sizes of the Moon and Sun. Once the Earth/Sun distance was found, parallax was used to … |

Watch Video: https://www.youtube.com/watch?v=CWMh61yutjU |

### Wikipedia based search results

1. **Astronomical unit**

The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun and equal to about 150 million kilometres…

https://en.wikipedia.org/wiki/Astronomical unit

2. **Distance**

distance is defined as "the different ways in which an object might be removed from" the self along dimensions such as "time, space, social distance,…

https://en.wikipedia.org/wiki/Distance

3. **List of unusual units of measurement**

States. The light-nanosecond is defined as exactly 29.9792458 cm. It was popularized as a unit of distance by Grace Hopper as the distance which a photon…

https://en.wikipedia.org/wiki/List of unusual units of measurement