How do they know the surface temperature of a star that is 8 light years away?

Answer 1

through the color would probably be the main way, but also through various types of ''lenses'' that may be sensitive to different properties of an object

have you ever noticed the different colors of flames?
like a lighter having a yellow-orange~ish color compared to a hotter burning handheld torch with a bluish flame
different colors can be indicative of different temps because of the different areas they may represent on the electromagnetic spectrum

Answer 2

Looking at the colour of a star gives an indication of the temperature, but accurate measurements are done by looking at absorption lines in the star's spectrum. These are dark lines where light is being absorbed by the material in the star, and they're dependent on temperature.

Answer 3

You can tell the temperature of a hot object by the color it glows, whether it's a stove burner or a star. Hot objects emit a continuous spectrum of light in a temperature-based distribution called black body radiation. So they look at the light curve (intensity versus wavelength) of the star's continuous spectrum and match it to the theoretical black body curve. The hotter an object is, the more its spectrum moves into the blue, so blue stars are hotter than red stars.

Answer 4

a million. Our solar has an anticipated existence of about 11 billion years. 2. in undemanding words 55% of anybody know that the solar is a action picture star. 3. For 186 days you may't see the solar in the North Pole. 4. Stars with truly sturdy gravity reason themselves to develop into smaller and smaller and ultimately develop into black holes. 5. A Comet's tail always factors faraway from the solar. 6. the three maximum those days got here across planets were Uranus in 1781, Neptune in 1846, and Pluto in 1930. 7. Jupiter has the shortest day of each of the planets. in spite of the undeniable fact that it has a circumference of 280,000 miles when compared with Earth's 25,000 Jupiter manages to make one turn in 9 hours and 55 minutes. 8. the sea of tranquility is got here across on the moon. 9. It takes about a million.25 seconds for moonlight to achieve the Earth. 10. an finished moon is 9 circumstances brighter than a 1/2 moon.

Answer 5

By its spetrographicsigniture. The light from a star tells a lot of things. The mixture of wavelengths is like a fingerprint--it tells us what the star's composition is--and also what temperature the star has to be at to producelight with certain wavelengths. And a good deal more information.

Answer 6

They look at the spectral lines in the output of the star with a device called a 'spectroscope' and determine temperatures from similar conditions created here, on Earth, in a lab.

Doug

Answer 7

After fixing for red or blue shift due to acceleration of the star to or from us, the wavelength of light can be used to determine the temperature

Answer 8

The color of the light is specific for given temperatures.

Answer 9

these guys are absolutley correct, a stars temperature is based on its color. only problem with your questtion is there are no stars that are eight lightyears away from earth. sirius however is about 9 lightyears away...and is a very hot blue star!!!!! hope this helps

Answer 10

They take the distance devided by the time and multiply that buy the area of the mass of fusion in the spectural simplexity. Then they take the triacular spantrix of the omilagato, and square it by ¼ of cake and there ya go.