Astronomy Picture of Day: Our Galaxy# Astronomy - 天文
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Our Galaxy in Stars, Gas, and Dust
Credit & Copyright: John P. Gleason, Steve Mandel
Explanation: The disk of our Milky Way Galaxy is home to hot nebulae, cold dust, and billions of stars. The red
nebulae visible in the above contrast-enhanced picture are primarily emission nebulae, glowing clouds of
hydrogen gas heated by nearby, bright, young stars. The blue nebulae are primarily reflection nebulae, clouds of
gas and fine dust reflecting the light of nearby bright stars. Pe
Credit & Copyright: John P. Gleason, Steve Mandel
Explanation: The disk of our Milky Way Galaxy is home to hot nebulae, cold dust, and billions of stars. The red
nebulae visible in the above contrast-enhanced picture are primarily emission nebulae, glowing clouds of
hydrogen gas heated by nearby, bright, young stars. The blue nebulae are primarily reflection nebulae, clouds of
gas and fine dust reflecting the light of nearby bright stars. Pe