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Argilite
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Denervation
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Reducing agent
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Holocene
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Megacycle
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Almond
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Scute
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Karstic network
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Polycyclic aromatic hydrocarbons
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Fluorite
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Giant magnetoresistance
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Sloth bear
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Magnetic reconnection
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Stereochemical formula
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Genotype
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Lesser kestrel
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Acne
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PCB
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Screen printing
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Ralph
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Nitrosamine
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Cave
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Influenza
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Steganography
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Polar mount
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EER
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Channel B
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Encoder
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Weak key
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EMS
M74
Messier 74 is a pretty spiral galaxy seen face-on 35 million light-years away in the constellation of Pisces.
The symmetrical structure of the whole galaxy was doubtless caused by a star-forming density wave which was at the origin of the spiral arms.
A very big telescope (at least 40 cm diameter) is needed to begin to see this spiral visually, although it can be seen as a small blurred spot using binoculars.
An exposure of over 4 hours using a CCD camera and a 20 cm telescope were needed by "Chamois" (the person's pseudonym on the forum) to take this picture.
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