With a little trigonometry, the different angles yield a distance.
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This technique works for stars within about light years of earth. There is no direct method currently available to measure the distance to stars farther than light years from Earth, so astronomers instead use brightness measurements.
It turns out that a star's color spectrum is a good indication of its actual brightness. The relationship between color and brightness was proven using the several thousand stars close enough to earth to have their distances measured directly. Astronomers can therefore look at a distant star and determine its color spectrum.
How are astronomers able to measure how far away a star is?
From the color, they can determine the star's actual brightness. By knowing the actual brightness and comparing it to the apparent brightness seen from Earth that is, by looking at how dim the star has become once its light reaches Earth , they can determine the distance to the star.
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Try connecting to your Wi-Fi network with another device mobile phone or portable computer next to your Nest thermostat to see if the network name is appearing. The 1st generation and 2nd generation Nest thermostats operate on Using Nest products with 2.
The next step is to restart your Nest thermostat. If you're still unable to connect after restarting your Nest thermostat, try resetting the Nest thermostat's network settings. Other devices that operate on a 2. You should try turning off any devices that may cause interference, then test the Nest thermostat's network connection.
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Here are some devices that may cause interference:. What is wireless interference and how do I troubleshoot it? Get an answer from an expert on the Google Home Help Forum.
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