![]() | |||
| |||
|
|||
Recent Articles
|
Topic: UV Rays
In the GALEX images, the blob appeared blue – though it doesn’t actually emit light visible to the human eye – and subsequent observations revealed a thick ring structure within it. So the team nicknamed it the Blue Ring Nebula. Over the next 16 years, they studied it with multiple Earth- and space-based telescopes, but the more they learned, the more mysterious it seemed. ![]() The Blue Ring Nebula consists of two expanding cones of gas ejected into space by a stellar merger. As the gas cools, it forms hydrogen molecules that collide with particles in interstellar space, causing them to radiate far-ultraviolet light. Invisible to the human eye, it is shown here as blue. (NASA/JPL-Caltech/M. Seibert (Carnegie Institution for Science)/K. Hoadley (Caltech)/GALEX Team) «Read the rest of this article» Sections: Technology | No Comments
NASA paints Mars 2020 Rover ChassisNASA’s Jet Propulsion Laboratory
But that’s not why the Ferrari driver came to Campanella. He turned to him because John Campanella has been painting spacecraft for NASA’s Jet Propulsion Laboratory in Pasadena, California, for over two decades. And if Campanella’s work is good enough for the final frontier, his friend thought, it would be good enough for his black prancing stallion. ![]() JPL mechanical technician Eduardo (Eddie) Castro uses a paint meter to measure the paint thickness on the Mars 2020 rover chassis. The reading on the meter indicates a thickness of 5.4 thousandths of an inch. The paint team wanted to achieve between four and six thousandths of an inch of paint after the application of three coats. (NASA/JPL-Caltech) «Read the rest of this article» Sections: Technology | No Comments
New NASA Study reveals ozone-depleting compound tetrachloride abundant in Earth’s Ozone LayerWritten by Tony Phillips
It is, essentially, sunscreen for planet Earth. Without the ozone layer, we would be bathed in dangerous radiation on a daily basis, with side effects ranging from cataracts to cancer. People were understandably alarmed, then, in the 1980s when scientists noticed that man made chemicals in the atmosphere were destroying this layer. «Read the rest of this article» Sections: Technology | No Comments
Tennessee Department of Health says it’s Time to Slip, Slop, Slap, Seek and SlideTennesseans Urged to Protect Skin, Eyes from Sun Damage
Sections: News | No Comments
Tennessee Department of Health says preparation for Spring Break should include focus on Health Protection
“One of the biggest concerns for every spring breaker should be protection against skin cancer,” said Tennessee Department of Health Commissioner John Dreyzehner, MD, MPH. “Exposure to ultraviolet rays, whether on a ski slope, sandy beach or tanning bed, puts you at increased risk for melanoma, a skin cancer that is painful and deadly.” «Read the rest of this article» Sections: News | No Comments
Tennessee Department of Health says Stay Safe in the Summer SunEasy Steps Help Prevent Skin Cancer
The Tennessee Department of Health is reminding Tennesseans of easy steps to follow to protect your skin this summer and all through the year. «Read the rest of this article» Sections: News | No Comments
NASA’s SAGE III to monitor the Earth’s fragile Ozone LayerWritten by Dr. Tony Phillips
Yet without it, life on Earth would be impossible. A fragile layer of ozone 25 km above Earth’s surface is all that stands between us and some of the harshest UV rays from the sun. The ozone molecule O3 blocks radiation which would otherwise burn skin and cause cancer. «Read the rest of this article» Sections: Technology | No Comments
Stellar ExtremophilesWritten by Dr. Tony Phillips
Scientists coined the term extremophile, which means “extreme-loving”, to describe the creatures–and the hunt was on for more. Soon, extremophiles were found living in deep Antarctic ice, the cores of nuclear reactors, and other unexpected places. Biology hasn’t been the same since. Could astronomy be on the verge of a similar transformation? ![]() This composite (radio+UV) image shows long octopus-like arms of star formation stretching far away from the main disk of spiral galaxy M83. (Credit: NASA/JPL-Caltech/VLA/MPIA) «Read the rest of this article» Sections: News | No Comments
Summer Sun Safety
Sections: News | No Comments
|
Now playing at the Movies
Archives |
|
© 2006-2021 Clarksville, TN Online is owned and operated by residents of Clarksville Tennessee.
|