The sun’s Surface has a grainy texture produced by numerous bright markings called? Granules.
Unlike most surfaces, it consists of a layer of incandescent gas less than 500 kilometers (300 miles) thick, with a grainy texture consisting of numerous relatively small, bright markings called granules.
Even hotter stars and other objects emit the most radiation in the blue, ultraviolet or even x-ray and gamma ray part of the spectrum. Objects like these appear blue to our eyes. Much cooler objects like planets and humans emit the most radiation in the infrared. Even cooler objects emit microwaves and radio waves.
|Which part of the sun lies directly above the visible “surface” of the sun?||chromosphere|
|What effect do solar flares have on Earth?||auroras|
|The thin red rim seen around the sun during a total solar eclipse is called the:||chromosphere|
|The sun’s surface is made up mostly of:||hydrogen|
The wavelength of light emitted by a moving object is shifted. This effect is called the doppler shift. If the object is coming toward you, the light is shifted toward shorter wavelengths, blue shifted . If the object is going away from you, the light is shifted toward longer wavelengths, red shifted .
The lower region of the Sun’s atmosphere is called the chromosphere. Its name comes from the Greek root chroma (meaning color), for it appears bright red when viewed during a solar eclipse. The chromosphere extends for about 2,000 kilometers (1,200 miles) above the visible surface of the Sun.
The outermost part of the Sun’s atmosphere is called the corona. Like the chromosphere, the corona was first observed during total eclipses (Figure 9).
The spectrum of a star is composed mainly of thermal radiation that produces a continuous spectrum. The star emits light over the entire electromagnetic spectrum, from the gamma rays to radio waves. However, stars do not emit the same amount of energy at all wavelengths.
A star’s spectrum contains information about its temperature, chemical composition, and intrinsic luminosity. Spectrograms secured with a slit spectrograph consist of a sequence of images of the slit in the light of the star at successive wavelengths.
For the Sun, the wavelength at which the maximum energy is emitted is 520 nanometers, which is near the middle of that portion of the electromagnetic spectrum called visible light.
The Sun is a huge ball of hydrogen and helium held together by its own gravity.
Doppler effect. Perceived change in wavelength of a way that is emitted from a source that is moving away or toward an object.
The solar chromosphere (color sphere) is a strongly structured and highly dynamic region (layer) of the Sun’s atmosphere, located above the bright, visible photosphere. It is optically thin in the near-ultraviolet to near-infrared spectral range, but optically thick in the millimeter range and in strong spectral lines.
There are three general types of spectra: continuous, emission, and absorption. Each is characterized by a different distribution of the wavelengths (i.e., colors) of radiation. … A continuous spectrum is produced by a hot, high-density light source. An emission spectrum is produced by a hot, low-density light source.
yellow-dwarf main sequence star
Related news. Our Sun is categorized as a G-type yellow-dwarf main sequence star. It is predicted that our Sun will remain in the main sequence phase for a few billion more years. Stars can live for billions of years, but their lives can be shorter or longer depending on their size (technically, their mass).Nov 10, 2020
|Common Name||Scientific Name||Spectral Type|
|Rigil Kentaurus||Alpha Cen||G2V + K1V|
The maximum wavelength of radiation emitted from the sun at 6000 K is about 550 nm.
Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.
large doppler shifts indicate
what was the first space telescope built by nasa?
what advantage do space telescopes have over telescopes used on earth?
which of the following is not considered a form of electromagnetic radiation?