Sunspots have two main structures: a central umbra and a surrounding penumbra.The umbra is the darkest region of a sunspot and is where the magnetic field is strongest and approximately vertical, or normal, to the Sun's surface, or photosphere.The umbra may be surrounded completely or only partially by a brighter region known as the penumbra. The penumbra is …

Sunspot (Roberto da Costa) is a fictional superhero appearing in American comic books published by Marvel Comics.The character is most commonly associated with X-Men-related groups the New Mutants and X-Force.. A mutant from Brazil, Sunspot possesses the ability to absorb and channel solar power.He is idealistic and impulsive, but is considered a close friend …

Telescopio riflettore Zeiss-Gautier. Il telescopio è uno strumento ottico che mediante il funzionamento di lenti o specchi o altri dispositivi permette la visione di oggetti spaziali lontani attraverso l'emissione, l'assorbimento o la riflessione da parte di questi di luce o di altre radiazioni elettromagnetiche.. Sebbene con il termine "telescopio" si indichi solitamente il telescopio …

Solar maximum is the regular period of greatest solar activity during the Sun's 11-year solar cycle.During solar maximum, large numbers of sunspots appear, and the solar irradiance output grows by about 0.07%. On average, the solar cycle takes about 11 years to go from one solar maximum to the next, with duration observed varying from 9 to 14 years.

Earth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from Earth's interior out into space, where it interacts with the solar wind, a stream of charged particles emanating from the Sun.The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in Earth's outer core: these ...

Chronicon ex chronicis. The Chronicon ex chronicis is a world wide history which begins with the creation and ends in 1140. The chronological framework of the Chronicon was presented by the chronicle of Marianus Scotus (d. 1082). A great deal of additional material, particularly relating to English history, was grafted onto it.

Psonic Psunspot is the second album by English rock band the Dukes of Stratosphear, released in 1987.Also counted as XTC's tenth studio album, it is a follow-up to 25 O'Clock (1985).. In 2002, the website Pitchfork listed the album at 66 on their "Top 100 Albums of the 1980s", calling the songs "a surreal rock-opera of opaque, hallucinogenic wonder".

The Dalton Minimum was a period of low sunspot count, representing low solar activity, named after the English meteorologist John Dalton, lasting from about 1790 to 1830 or 1796 to 1820, corresponding to the period solar cycle 4 to solar cycle 7.While the Dalton Minimum is often compared with the Maunder Minimum, its sunspot number was slightly higher and reported …

Azazel is a fictional supervillain appearing in American comic books published by Marvel Comics.Created by Chuck Austen and Sean Philips, Azazel first appeared in Uncanny X-Men #428 (August 2003). He belongs to the subspecies of humans named mutants, who are born with superhuman abilities, and to the species of humanoid magical beings named demons, who are …

Due to its unique spot in the spectrum, 10 meters can occasionally be challenging to work. At peak times of the solar cycle when many sunspots appear on the Sun's surface, 10 meters can be alive with extremely long-distance signals, refracting from the F2 layer in the ionosphere.Generally speaking, the most effective and efficient propagation of 10-meter radio waves takes place …