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migration tracks on the sun
2014-09-04 11:34:53

Karen C. Fox, NASA's Goddard Space Flight Center Approximately every 11 years, the sun undergoes a complete personality change from quiet and calm to violently active. The height of the sun’s activity, known as solar maximum, is a time of numerous sunspots, punctuated with profound eruptions that send radiation and solar particles out into the far reaches of space. However, the timing of the solar cycle is far from precise. Since humans began regularly recording sunspots in the 17th...

molecular cloud thinkstock 89614446
2014-09-01 04:34:43

Chuck Bednar for redOrbit.com - Your Universe Online Astrophysicists and computational astronomers from the University of California, Santa Cruz have discovered why sibling stars look alike – those formed from a single cloud share the same chemical fingerprint due to early, fast and turbulent mixing of gas in the giant molecular clouds where star formation occurs. Stars are made primarily of hydrogen and helium, but they also contain trace amounts of elements such as carbon, oxygen...

Supernova_explosion
2014-08-30 07:29:17

European Space Agency Astronomers using ESA’s Integral gamma-ray observatory have demonstrated beyond doubt that dead stars known as white dwarfs can reignite and explode as supernovae. The finding came after the unique signature of gamma rays from the radioactive elements created in one of these explosions was captured for the first time. The explosions in question are known as Type Ia supernovae, long suspected to be the result of a white dwarf star blowing up because of a...

January 2005 solar storm
2014-08-29 03:30:12

Karen C. Fox, NASA's Goddard Space Flight Center A space weather storm from the sun engulfed our planet on Jan. 21, 2005. The event got its start on Jan. 20, when a cloud of solar material, a coronal mass ejection or CME, burst off the sun and headed toward Earth. When it arrived at our planet, the ring current and radiation belts surrounding Earth swelled with extra particles, while the aurora persisted for six hours. Both of these are usually signs of a very large storm – indeed, this...

2014-08-28 23:08:35

Vizini, the comfort-centric strapless sun visor designed to prevent “hat hair” and headaches, wants to remind outdoor enthusiasts to protect their eyes when fall 2014 arrives this September. Round Hill, Virginia (PRWEB) August 28, 2014 “The fall sun may not shine as bright or feel as warm as what we experienced this past summer, but its harmful UV rays can still reach your eyes,” reports Rita Hockenbury, eye health enthusiast and creator of the Vizini strapless sun visor....

local bubble
2014-08-27 08:50:47

Dr. Tony Phillips, Science@NASA Once every 50 years, more or less, a massive star explodes somewhere in the Milky Way. The resulting blast is terrifyingly powerful, pumping out more energy in a split second than the sun emits in a million years. At its peak, a supernova can outshine the entire Milky Way. It seems obvious that you wouldn't want a supernova exploding near Earth. Yet there is growing evidence that one did — actually, more than one. About 10 million years ago, a nearby...

2014-08-27 08:28:18

Industry-first LED and Laser Light Module for Endoscopy and Microscopy Applications Offers Higher Efficacy, Longer Life and Safer Operating Conditions than Conventional Lamps DANVERS, Mass., Aug. 27, 2014 /PRNewswire/ -- North American lighting leader OSRAM SYLVANIA has been recognized with a prestigious R&D 100 Award for the new OSRAM ITOS(®) PHASER(®) 3000, the industry's first laser and LED-based white light module for microscopy, endoscopy and surgical head lamps that...

2014-08-26 12:22:09

Automated home lighting system expands to include recessed and outdoor lighting fixtures AURORA, Ohio, Aug. 26, 2014 /PRNewswire/ -- Technical Consumer Products, Inc. (TCP), a leader in energy-efficient lighting innovations, today announced the availability of Connected by TCP® in BR30 and PAR38 bulb shapes. With the addition of these new energy-efficient lighting products, home and business owners can utilize Connected by TCP's Wi-Fi-enabled LED bulbs in recessed and outdoor...

extreme ultraviolet light activity on the sun
2014-08-21 04:17:23

April Flowers for redOrbit.com - Your Universe Online As children, we are told never to look directly at the Sun, especially through the lens of a camera, telescope or magnifying glass. Even if a person used the special filters that would allow them to gaze at the Sun, they would not be able to see all of the wavelengths of light emanating from the Sun. To fully understand our star, scientists must use spacecraft that can observe this invisible light before it is absorbed by the...

2014-08-20 12:23:43

LONDON, Aug. 20, 2014 /PRNewswire/ -- Reportbuyer.com has added a new market research report:Global High Intensity Discharge (HID) Bulbs Industryhttps://www.reportbuyer.com/product/1939409/Global-High-Intensity-Discharge-HID--Bulbs-Industry.htmlThis report analyzes the worldwide markets for High Intensity Discharge (HID) Bulbs in US$ Million. The report provides separate comprehensive analytics for the US, Canada, Japan, Europe, Asia-Pacific, Middle East & Africa, and Latin...


Latest light sources Reference Libraries

Stellar Astrophysics
2014-01-12 00:00:00

The prominent feature that allows for the existence of life on Earth is the Sun. Radiation from our closest star provides heat and energy to our planet, driving biological processes and providing the necessary conditions for liquid water to naturally exist. But our Sun is only but one star in this vast Universe. And as it turns out, most stars are quite different than the one that illuminates our day. For this reason, scientists have, for hundreds of years, attempted to study the other...

4_a9775d2328a386c7976f6f9895c6d2ac2
2004-10-19 04:45:40

The Sun -- intensely hot, self-luminous body of gases at the center of the solar system. Its gravitational attraction maintains the planets, comets, and other bodies of the solar system in their orbits. The sun is actually a star of about medium size; it appears larger than the other stars because of its relative nearness to the earth. The earth's distance from the sun varies from 91,377,000 mi (147,053,000 km) at perihelion to 94,537,000 mi (152,138,000 km) at aphelion (see apsis). The...

3_5b8f828cdf6b44752884e721c0a2e6bd2
2004-10-19 04:45:40

Crab Nebula -- The Crab Nebula (Messier 1, NGC 1952) is the object the which started Charles Messier logging non-cometary objects on his Messier Catalog. It is the expanding cloud of gas thrown off in the explosion that gave rise to the 1054 supernova recorded by Chinese astronomers, now more than 6 light years across (the nebula is currently expanding at 1000 km/sec and the total mass of ejected material is about 0.1 solar masses). The supernova which produced it was bright enough to...

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Word of the Day
omadhaun
  • A fool; a simpleton: a term of abuse common in Ireland and to a less extent in the Gaelic-speaking parts of Scotland.
This word is partly Irish in origin.