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Spiral Galaxy - Canis Venitici We can only see about 1/6 (ca 6000ly) of the way to the Galctic Centre due to scattering by gas and dust in the disk.

Published byAlaina Malone Modified over 9 years ago

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Presentation on theme: "Spiral Galaxy - Canis Venitici We can only see about 1/6 (ca 6000ly) of the way to the Galctic Centre due to scattering by gas and dust in the disk."— Presentation transcript:

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2 Spiral Galaxy - Canis Venitici

3 We can only see about 1/6 (ca 6000ly) of the way to the Galctic Centre due to scattering by gas and dust in the disk

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6 Diffuse Nebula

7 Attenuation due to scattering by interstellar gas and dust clouds

8 ν →ν → Rotating binary star system with one dark companion Diffuse interstellar cloud Absorption against the hot background emission exhibits a varying Doppler Shift Absorption of an atom in interstellar cloud unshifted Absorption line of an atom in the cool atmosphere in the spectrum of a star

9 Multiple Clouds in the Line of Sight Na D Lines Ca Line

10 Doppler Shifts in Interstellar lines  /  =  / = v/c

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12 Rosette Nebula

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16 Scattering by interstellar Gas and Dust

17 Hartman 1904 K Ti Fe Ca Na T (100K) BinaryDiffuse cloud

18 Multiple Clouds in the Line of Sight

19 Harry Kroto 2004

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