A closer look revealed the latest planetary discovery, along with a third, larger planet that orbits the star every 84 days. The planets have been named after their star, with the most earthlike called Gliese c. The team spotted the planet by searching the "habitable zone". A light year is a measurement of distance not speed.
This is where confusion sometimes arises. Because things in the universe are so far away from each other you need a unit of measurement to be much larger than a mile or kilometre. So, a light year is how far a photon of light will travel in an earth year. Please enter distance or time, the other value will be calculated. Examples: the average distance of the moon from earth is kilometers.
All of the other stars we can see with our eyes are farther, some even thousands of light-years away. Stars are found in large groups called galaxies. A galaxy can have millions or billions of stars. The nearest large galaxy to us, Andromeda, is 2. So, we see Andromeda as it was 2. The universe is filled with billions of galaxies, all farther away than this. Some of these galaxies are much farther away. It is That is only million years after the big bang. To find the distance of a light-year, you multiply this speed by the number of hours in a year 8, The result: One light-year equals 5,,,, miles 9.
At first glance, this may seem like an extreme distance, but the enormous scale of the universe dwarfs this length. Measuring in miles or kilometers at an astronomical scale would be extremely cumbersome and impractical. Starting in our cosmic neighborhood, the closest star-forming region to us, the Orion Nebula, is a short 7,,,,, miles away, or more simply, 1, light-years away.
The center of our galaxy is about 27, light-years away. The nearest spiral galaxy to ours, the Andromeda galaxy, is 2.
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