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18 Μαΐ 2020 · For much greater distances — interstellar distances — astronomers use light years. A light year is the distance a photon of light travels in one year, which is about 6 trillion miles (9 trillion kilometers, or 63,000 AU).
Since light travels at a speed of approximately 186,282 miles per second (299,792,458 meters per second), a light year is a significant distance — about 5.88 trillion miles (9.46 trillion km). Please check out our distance calculator to understand more about this topic.
By observing light from faraway cosmic objects, the Hubble Space Telescope is like a time machine. Light takes time to reach Hubble, because it travels great distances. That means images captured by Hubble today, show what the objects looked like years ago!
18 Μαΐ 2020 · For much greater distances — interstellar distances — astronomers use light years. A light year is the distance a photon of light travels in one year, which is about 6 trillion miles (9 trillion kilometers, or 63,000 AU).
Explore the vastness of the cosmos with our Light Year Calculator. Measure interstellar distances and journey through the universe, one light year at a time!
Check out the Virtual Choir Deep Field project to explore more on distance. Cosmic Distances. In astronomy, distances are measured in units of light years, where one light year is the distance that light travels in a year—10 trillion kilometers.
A light year is the typical distance between stars in the neighborhood of the Sun. It is nearly 10 trillion kilometers or 6 trillion miles! The fundamental unit of distance defined by geometry is the parsec, equal to 3.1 × 10 13 km. This is described in more detail in the article on parallax.
