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One Astronomical Unit is the average distance between the Sun and the Earth. It is a useful measurement, so that we can say that "Neptune is 30 AU from the Sun" instead of saying "Neptune is 30 times farther from the Sun than the Earth is".
What else can I help you with?
When did astronomers have a meeting at the International Astronmical Union and decided that Pluto was too small to be a planet?
That was in 2006.
What is another word for unit of measuring nearby stars?
another unit for measuring distances is AU (Astronmical Unit)
Which is the planet that is one astronmical unit from the sun?
Earth. The average sun to Earth distance is how one Astronomical Unit is defined (1 AU).
Why does the weaker force of gravity dominate over the electrical forces for astronmical objects?
Gravity dominates over electrical forces for astronomical objects because gravity is always an attractive force, while electrical forces can be attractive or repulsive. In very large-scale systems, like planets, stars, and galaxies, the cumulative effect of gravity from all the mass present is much stronger than the electrical forces, since they can cancel each other out. Gravity also has an infinite range, allowing it to influence objects over vast distances.
