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How Do Astronomers Gather Gather Information About Space?

How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

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Page 1: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

How Do Astronomers

Gather Gather Information

About Space?

Page 2: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

TEKS 8.8C explore how different wavelengths of the

electromagnetic spectrum such as light and radio waves are

used to gain information about distances and properties of components of the universecomponents of the universe

Page 3: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

Most of the information we have about the universe

comes from radiation.

Page 4: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

Objects in the universe, such as stars and such as stars and galaxies, emit radiation.

Page 5: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

This radiation travels as waves. Different kinds of radiation have differing have differing wavelengths and energies.

Page 6: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

We cannot seemost of the radiation, but telescopes are used to collect used to collect the radiation for astronomers to study.

Page 7: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

The entire collection of different kinds of different kinds of radiation is called the Electromagnetic

Spectrum.

Page 8: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

The electromagnetic spectrum is a continuum of waves divided into regions based on wavelengths.based on wavelengths.

Page 9: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

At one end of the At one end of the spectrum are radio waves, which allow you to listen to your favorite radio station.

Page 10: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

In the central portion is In the central portion is the only part of the spectrum you can see with your eye, the visible region.

Page 11: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

Most of the visible region comes from the Sun.Sun.

Page 12: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

When light is passed through a prism, it bends

and separates into its different wavelengths.

Page 13: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

Spectroscopy is the study of the spectrum.A spectroscope is

used to separate light separate light into its component wavelengths so that they can be studied.

Page 14: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

The pattern of wavelengths and colors

is called a spectrum.

Page 15: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

By obtaining and analyzing the

spectrum from a distant object,

astronomers can astronomers can determine the object’s temperature, density,

direction of motionand composition.

Page 16: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

Each elementcomposing a star has a unique spectrum. Just

like a fingerprint…..like a fingerprint…..

Page 17: How Do Astronomers Gather Information About …newcomeresl.weebly.com/uploads/2/8/0/9/28096307/how...through a prism, it bends and separates into its different wavelengths. Spectroscopy

Astronomers use the spectral patterns from stars and other objects to objects to determine what elementscompose the object.