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Emission and Reflection in NGC 6559
<< Yesterday 23.10.2001 Tomorrow >>
Emission and Reflection in NGC 6559
Credit: Robert Gendler
Explanation: Bright gas and dark dust permeate the space between stars in a nebula known as NGC 6559. The gas, primarily hydrogen, is responsible for the diffuse red glow of the emission nebula. As energetic light from neighboring stars ionizes interstellar hydrogen, protons and electrons recombine to emit light of very specific colors, including the red hue observed. Small dust particles reflect blue starlight efficiently and so creates the blue reflection nebulosity seen near two of the bright stars. Dust also absorbs visible light, causing the dark clouds and filaments visible. NGC 6559 lies about 5000 light-years away toward the constellation of Sagittarius.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Russkii tekst
Based on Astronomy Picture Of the Day
Publikacii s klyuchevymi slovami: otrazhatel'nye tumannosti - reflection nebula - emission nebula - NGC 6559 - emissionnaya tumannost'
Publikacii so slovami: otrazhatel'nye tumannosti - reflection nebula - emission nebula - NGC 6559 - emissionnaya tumannost'
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