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  2. Light-year - Wikipedia

    en.wikipedia.org/wiki/Light-year

    A light-year, alternatively spelled light year (ly or lyr [3]), is a unit of length used to express astronomical distances and is equal to exactly 9 460 730 472 580.8 km, which is approximately 5.88 trillion mi.

  3. Speed of light - Wikipedia

    en.wikipedia.org/wiki/Speed_of_Light

    A light-year is the distance light travels in one Julian year, around 9461 billion kilometres, 5879 billion miles, or 0.3066 parsecs. In round figures, a light year is nearly 10 trillion kilometres or nearly 6 trillion miles. Proxima Centauri, the closest star to Earth after the Sun, is around 4.2 light-years away. [89]

  4. Astronomical unit - Wikipedia

    en.wikipedia.org/wiki/Astronomical_unit

    Light-year: 63 241 — Distance light travels in one Julian year (365.25 days) — Oort cloud: 75 000: ± 25 000: Distance of the outer limit of Oort cloud from the Sun (estimated, corresponds to 1.2 light-years) — Parsec: 206 265 — One parsec. The parsec is defined in terms of the astronomical unit, is used to measure distances beyond the ...

  5. Webb telescope confirms the universe is expanding at an ...

    www.aol.com/news/webb-telescope-confirms...

    A light-year is the distance light travels in a year, 5.9 trillion miles (9.5 trillion km).

  6. Wikipedia:Reference desk/Archives/Mathematics/2012 May 20

    en.wikipedia.org/wiki/Wikipedia:Reference_desk/...

    What you really want to know is: How many miles/kilometers are there in a light year? -- ♬ Jack of Oz ♬ [your turn] 22:43, 20 May 2012 (UTC) [ reply ] Yes, the exact answer is 9.460 730 472 580 8 million million kilometres which is about 5.8786 million million miles (avoiding usage of the still-slightly-ambiguous "trillion", though there's ...

  7. Parsec - Wikipedia

    en.wikipedia.org/wiki/Parsec

    The parsec (symbol: pc) is a unit of length used to measure the large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,265 astronomical units (AU), i.e. 30.9 trillion kilometres (19.2 trillion miles).

  8. An EV startup unveiled a $263,000 solar-powered car that can ...

    www.aol.com/news/ev-startup-unveiled-263-000...

    Lightyear's first solar-powered electric car costs $263,000, but just think about how much you'll save on gas. An EV startup unveiled a $263,000 solar-powered car that can go 43 miles per day ...

  9. Light-second - Wikipedia

    en.wikipedia.org/wiki/Light-second

    1.127 × 10 11 miles: The Oort cloud is thought to extend between 41 and 82 light-weeks out from the Sun light-year 365.25 light-days = 31 557 600 light-seconds 9 460 730 472 580 800 m: 9.461 × 10 12 km: 5.879 × 10 12 miles: Proxima Centauri is the nearest star to the Sun, about 4.24 light years away