Explanation: Is our Galaxy this thin? We believe so. The Milky Way, like NGC 891 pictured above, has the width of a typical spiral galaxy. Spirals have most of their bright stars, gas, and obscuring dust in a thin disk. This disk can be so thin the spiral galaxy appears edge-on like a compact disk seen sideways. The dark band across the middle is a lane of dust which absorbs light. Some of the billions of stars that orbit the center of NGC 891, however, appear to be moving too fast to just be traveling in circles. What causes this peculiar motion? One hypothesis is that NGC 891 has a large bar across its center - a bar that would be obvious were we to see this galaxy face-on instead of edge-on. This false color picture was constructed from 3 near infrared images.

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

Publikacii s klyuchevymi slovami: spiral galaxy - spiral'naya galaktika s peremychkoi - disk, galakticheskii Publikacii so slovami: spiral galaxy - spiral'naya galaktika s peremychkoi - disk, galakticheskii
Sm. takzhe: NGC 300: galaktika iz zvezd Spiral'naya galaktika s peremychkoi NGC 1365 ot teleskopa "Dzheims Vebb" Spiral'naya galaktika NGC 6744 M106: spiral'naya galaktika so strannym yadrom NGC 247 s druz'yami Licom k NGC 6946 M83: zvezdnye potoki i tysyacha rubinov Vse publikacii na tu zhe temu >>