The Interstellar Medium Interstellar Medium

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Stars embedded in a Dark Cloud…This is one of the best ways to study star formation.visible light(few stars)infrared light(many stars!)
How do we learnabout DUST in theISM (InterStellar<strong>Medium</strong>)?Consider a dust cloudbetween a star andthe Earth:• Dust reduces the intensity of light, with larger extinctionsat shorter wavelengths.
Page 1 and 2: The Interstellar MediumGas and Dust
Page 3 and 4: Emission Nebula - glowing gas
Page 5 and 6: The Milky Way: View towards the Gal
Page 7 and 8: Dust absorbs/scatters blue light mo
Page 9: The Milky Way: View towards the Gal
Page 13 and 14: Dust Temperatures: Thermal (Blackbo
Page 15 and 16: How do we learn about GAS in the IS
Page 17 and 18: How do we learn about gas in the IS
Page 19 and 20: Average ISM Characteristics:(mostly
Page 21 and 22: Measuring cool gas: 21-cm Radiation
Page 23 and 24: Measuring cool gas: Interstellar Mo
Page 25 and 26: This formaldehyde “map” shows w
Page 27 and 28: Eagle Nebula (M16, in Orion)d k l d
Page 29 and 30: The gravitational force of a few at
Page 31 and 32: Stage 2: Continuing Collapse of eac
Page 33 and 34: Stage 3: Fragmentation Ceases, a Pr
Page 35 and 36: Stage 5: Protostar II (10 million y
Page 37 and 38: Stage 7: The Main Sequence (10 bill
Page 39 and 40: Star Clusters - the result of fragm

The Interstellar Medium Interstellar Medium

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