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NASA releases record-breaking photos from beyond Pluto

Astronomy Magazine - Feb 14, 2018
The image was taken from a distance of 3.79 billion miles (6.12 billion km, or 40.9 astronomical units — 1 astronomical unit (AU) is the average Earth-Sun distance, and Pluto ranges between about 30 and 50 AU). In comparison, Voyager 1's iconic “Pale ...

Before Launching Probes to Venus, NASA Had to Figure Out Exactly Where It Was

Air & Space Magazine - Jan 17, 2018
The astronomers had adopted a value based on 19th century observations of the transit of Venus across the sun, and that's not a very accurate way to determine the [Astronomical Unit]….” When Venus' proper position was charted, he said, “we found that ...

'Potentially hazardous asteroid' bigger than Earth's tallest building will zoom past us next month

Fox News - Jan 18, 2018
MASSIVE, 3-MILE-WIDE 'POTENTIALLY HAZARDOUS ASTEROID' WILL ZOOM PAST EARTH TOMORROW. PHAs are defined by NASA as Near-Earth Asteroids "whose Minimum Orbit Intersection Distance (MOID) with the Earth is 0.05 [in astronomical units] or less and whose ...

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The Solar System, an Astronomical Unit: A Work of Deduction Based on a Fundament


The Solar System an Astronomical Unit (1911)




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Astronomical Unit videos

What is an Astronomical Unit?

Ever wondered just how long one AU is? Well here is the answer in roughly one minute!

Measuring the Universe

The vast size of the universe requires special units when measuring distances. This video explains the Astronomical Unit, the Light-year and the parsec.

Astronomical units, parsecs and light years, explained: fizzics.org

Free notes can be copied from here: http://www.fizzics.org Explaining the definitions of and the connections between the different units commonly used to measure distances in astronomy where...

Astronomical unit Meaning

Video shows what astronomical unit means. The mean distance from the Earth to the Sun (the semi-major axis of Earth's orbit), approximately 149600000 kilometres (symbol AU), used to measure...

Astronomical Unit (AU) (JNS09A)

Learn complete Physics for IIT JEE for free. Browse through topics and tons of solved examples to practice solving easy and tough problems.