Yahoo Poland Wyszukiwanie w Internecie

Zaloguj się

Search results

  1. spaceplace.nasa.gov › light-year › enWhat Is a Light-Year? | NASA Space Place – NASA Science for Kids

    9 lip 2024 · A light-year is the distance light travels in one Earth year. Learn about how we use light-years to measure the distance of objects in space.

    • Mystery

      Tsunami is a Japanese word that means "harbor wave." It is a...

    • Science and Tech

      Space Communications and Navigation Kids Zone This link...

    • How Far Away Is The Moon

      How far apart? To see for yourself how far apart Earth and...

    • What is a Galaxy

      The Hubble Space Telescope looked at a small patch of space...

  2. en.wikipedia.org › wiki › Light-yearLight-year - Wikipedia

    As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in a vacuum in one Julian year (365.25 days). Because it includes the word "year", the term is sometimes misinterpreted as a unit of time .

  3. www.space.com › light-yearWhat is a light-year? | Space

    22 gru 2021 · A light-year is the distance a beam of light travels in a single Earth year, which equates to approximately 6 trillion miles (9.7 trillion kilometers). On the scale of the...

  4. thespacevortex.com › 2024 › 06What Is a Light Year? (With interactive calculator)

    22 cze 2024 · A light year is the distance light travels in one year, which is about 31,557,600 light seconds. How many light years across is the Milky Way? The Milky Way galaxy is estimated to be about 100,000 light years in diameter.

  5. sciencenotes.org › what-is-a-light-year-definition-and-examplesWhat Is a Light Year? Definition and Examples - Science Notes and...

    28 maj 2020 · A light year (ly) is the distance light travels in one Earth year. It is 9.4607×10 15 meters or 5.8786×10 12 miles, about 63 astronomical units or about 0.3 parsecs. It is an intermediate unit of astronomical distance.

  6. coolcosmos.caltech.edu › ask › 297-What-is-a-light-year-What is a light-year? | Cool Cosmos

    Astronomers use the speed of light to measure how far away things are in space. A light-year (ly) is the distance that light can travel in one year. In one year, light travels about 5,880,000,000,000 miles or 9,460,000,000,000 kilometers.

  7. sentinelmission.org › astronomical-units-measurements-glossary › light-yearLight-Year - Definition & Detailed Explanation - Astronomical...

    24 mar 2024 · In space exploration, the concept of a light-year is used to plan missions to distant objects in our solar system and beyond. By knowing the distance to these objects in light-years, scientists can calculate the time it would take for a spacecraft to reach its destination.