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Astronomy Picture of the Day: The Long Gas Tail of Spiral Galaxy D100
The Long Gas Tail of Spiral Galaxy D100 Why is there long red streak attached to this galaxy? The streak is made mostly of glowing hydrogen that has been systematically stripped away as the galaxy moved through the ambient hot gas in a cluster of galaxies. Specifically, the galaxy is spiral galaxy D100, and cluster is the Coma Cluster of galaxies. The red path connects to the center of D100 because the outer gas, gravitationally held less strongly, has already been stripped away by ram pressure. The extended gas tail is about 200,000 light-years long, contains about 400,000 times the mass of our Sun, and stars are forming within it. Galaxy D 99, visible to D100's lower left, appears red because it glows primarily from the light of old red stars -- young blue stars can no longer form because D99 has been stripped of its star-forming gas. The featured false-color picture is a digitally enhanced composite of images from Earth-orbiting Hubble and the ground-based Subaru telescope. Studying remarkable systems like this bolsters our understanding of how galaxies evolve in clusters.
January 28, 2019 via NASA https://go.nasa.gov/2DEtkqV
By Liam McCabe This post was done in partnership with Wirecutter . When readers choose to buy Wirecutter's independently chosen editorial picks, it may earn affiliate commissions that support its work. Read the full article here . After six summers of researching, testing, and recommending window air conditioners, we've learned that quiet and affordable ACs make most people the happiest—and we think the LG LW8016ER will fit the bill in most rooms. This 8,000 Btu unit cools as efficiently and effectively as any model with an equal Btu rating, and runs at a lower volume and deeper pitch than others at this price. Little extra features like a fresh-air vent, two-axis fan blades, and a removable drain plug help set it apart, too. The LG LW8016ER is a top choice for an office or den, and some people will find it quiet enough for a bedroom, too. If our main pic
Lenovo is announcing a pair of new laptops today, the Yoga 730 and Flex 14, both of which are seeing a number of small design tweaks and receiving Intel’s 8th gen processors. While there aren’t any major changes this year, the 730 is getting one notable improvement to help it stand out: it has built-in far-field mics so that it can support Alexa. The Yoga 730 is really similar to last year’s Yoga 720 : like all Yoga laptops, it has a touchscreen and can flip around into tablet mode; it starts with a price around $900 but can go much higher if you spec it out; and while it’s a well-made laptop with an aluminum body, it isn’t quite as slim or light as what Lenovo offers in its Yoga 900 series laptops. This year, the 730 has received a few... Continue reading… via The Verge - Tech Posts "http://ift.tt/2BQTs1c"