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Latest light sources Stories

2015-03-25 08:26:58

New product release from DSA Phototech offers innovative LED technology combined with affordability. CARSON, Calif., March 25, 2015 /PRNewswire/ -- DSA Phototech is proud to announce

2015-03-24 23:08:32

GIA announces the release of a comprehensive global report on Traditional Incandescent Bulbs.

The remnant of the nova of 1670 seen with modern instruments
2015-03-23 11:33:26

A mysterious explosion in the sky observed in the 17th century was not a nova, but a much rarer, violent stellar collision.

million stars forming
2015-03-19 12:09:00

Astronomers have identified a previously invisible stellar cluster currently forming over 1 million new stars, according to a report in the journal Nature.

MAVEN Auroras Mars
2015-03-19 08:36:23

Just a day after skywatchers at mid- to upper-latitudes around the world were treated to a particularly energetic display of auroras on the night of March 17 as a result of an intense geomagnetic storm, researchers announced findings from NASA’s MAVEN mission of auroral action observed on Mars – although in energetic ultraviolet wavelengths rather than visible light.

2015-03-18 20:20:52

LONDON, March 18, 2015 /PRNewswire/ -- This report analyzes the worldwide markets for Vehicular Lighting in Thousand Units by the following Product Groups/Segments: Automotive Lamps (Headlamps,

2015-03-17 23:05:36

Larson Electronics has developed a new 28 watt LED tube lamp that is an excellent choice for upgrading existing T8 fluorescent lamp fixtures as well as a direct replacement for our own LED light

2015-03-17 23:01:21

Leapfrog Lighting's new five-step LED lighting retrofit package makes it simple for businesses to lower their lighting-related electricity costs by up to 85%, while eliminating complexity,

2015-03-16 23:04:52

Ushio America, Inc. is proud to introduce a reliable LED PAR 38 replacement lamp solution for high ceilings and long throws of light.

2015-03-13 23:02:54

LED troffers, high bay fixtures, recessed downlights, and vapor tight fixtures now available at Topbulb. East Chicago, IN (PRWEB) March 13, 2015 Topbulb,


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...

Supernova
2004-10-19 04:45:42

Supernova -- A supernova is a star that increases its brightness drastically within a matter of days, making it appear as if a "new" star was born (hence "nova"). The "super" prefix distinguishes it from a mere nova, which also involves a star increasing in brightness, though to a lesser extent and through a much different mechanism. Astronomers have classified supernovae in several classes, according to the lines of different elements that appear in their spectra. The first element...

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
ethnarch
  • The governor of a province or people.
The word 'ethnarch' comes from a Greek word meaning 'ruler of a tribe or nation'.
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