06 maio 2017
Star Formation in the Tadpole Nebula
What's all of the commotion in the Tadpole nebula? Star formation. Dusty emission in the Tadpole nebula, IC 410, lies about 12,000 light-years away in the northern constellation of the Charioteer (Auriga). The cloud of glowing gas is over 100 light-years across, sculpted by stellar winds and radiation from embedded open star cluster NGC 1893. Formed in the interstellar cloud a mere 4 million years ago, bright newly formed cluster stars are seen all around the star-forming nebula. Notable near the image center are two relatively dense streamers of material trailing away from the nebula's central regions. Potentially sites of ongoing star formation in IC 410, these cosmic tadpole shapes are about 10 light-years long. The featured image was taken in infrared light by NASA's Wide Field Infrared Survey Explorer (WISE) satellite.
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History of a Prefix
Step- (as in stepmother or stepsister) had long been associated with orphans and orphanages. In old English, steopcild meant “orphan.” The words “stepfather” and “stepmother” therefore originally meant one who becomes father or mother to an orphan. In the 1900s this connection faded (and orphanages became less common). Step- came to mean anyone who is related by marriage.
"A woman is like a tea bag. You never know how strong she is until she gets in hot water."
“A woman is like a tea bag. You never know how strong she is until she gets in hot water.”
- Eleanor Roosevelt
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- Eleanor Roosevelt
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