... The Sun gives us light and heat, sustaining life on Earth. ... This uneven rotation, coupled with the churning of the upper layers, might well be what produces (by a "dynamo mechanism", described in a later section) regions of intense magnetic field, seen by observers on Earth as dark sunspots. ... Near sunspots those streamers seem to be shaped by the Sun's magnetic field lines, and above the Sun's poles they suggest field lines rising from twin magnetic poles like those of the Earth. ...

The Sun gives us light and heat, sustaining life on Earth. ... This uneven rotation, coupled with the churning of the upper layers, might well be what produces (by a "dynamo mechanism", described in a later section) regions of intense magnetic field, seen by observers on Earth as dark sunspots. ... Near sunspots those streamers seem to be shaped by the Sun's magnetic field lines, and above the Sun's poles they suggest field lines rising from twin magnetic poles like those of the Earth. ...

... Posts tagged ?particle filter? ... Astronomers have developed their ways of processing signals almost independent to but sometimes collaboratively with engineers, although the fundamental of signal processing is same: extracting information. ... This particular issue of IEEE signal processing magazine may shed lights for astronomers interested in signal processing and statistics outside the astronomical society. IEEE Signal Processing Magazine Jul. ... ArXiv] 3rd week, Dec. ... Entries RSS . ...

... Обзор LPR фильтра. Впечатления от наблюдений с LPR фильтром. ... Характеристики цветных фильтров Baader-Planetarium . Мой перевод pdf- файла о фильтрах с сайта Baader-Planetarium (379 кб) . ...

Astronomy Picture of the Day . ... Credit Copyright: NASA , ESA , Hubble Heritage Team ( STScI / AURA ) Explanation: Neptune rotates once on its axis in about 16 hours. ... Because Neptune's axis of rotation is tilted to its orbital plane by 29 degrees, compared to Earth's 23.5 degrees, Neptune experiences seasons analogous to Earth's . ... With an orbital period of approximately 165 years, this week on July 12, Neptune has been once around the Sun since its discovery date. ... July . ... July 2011 . ...

12feb07 Measuring the SEFD around 1100 Mhz . ... bandpass filter low frequency falloff around 1130 Mhz . ... A 500 Mhz bandpass centered on 1100 Mhz (via the spectrum analyzer) showed a 6 db difference between 1100 Mhz and the noise floor at 1000 Mhz. ... The interim correlator was used with 25 Mhz bands centered at: 1040, 1060, 1080, and 1100 Mhz. ... 1040 Mhz cfr trking src(.gif) There is probably not very much sky signal getting into this band so it looks better than it should. ...

The polarizer quads were also designed to map onto a four-faceted WFC configuration and, consequently, also require a partial filter rotation of -33° to move the filter quadrant 1 (nominal polarization angle 135°) into WFCs 2 and 3, with some vignetting of both camera fields. Several additional partial rotations have been added to allow observations with different polarization angles on the same CCD. ... Table 3.10: Polarizer Quad Filter. ... Filter Name . ... Nominal filter wheel position . ...

... The fact that the Sun is a gas, however, lets different regions pass by one another fluidly. ... This differential rotation has interesting ramifications for the Sun's magnetic field. ... This bizarre distortion of the magnetic field results in active phenomena on the surface of the Sun. ... Magnetic instabilities in the solar field cause short, violent ejections of gas called solar flares-the most explosive events on the Sun. ... The Sun can also be viewed safely through special types of filters. ...

XMM ­ Newton CCF Release Note XMM ­ CCF ­REL­47 EPIC Filter Transmission D Lumb November 16, 2000 1 CCF components Name of CCF VALDATE List of Blocks changed CAL VERSION XSCS flag EMOS1 FILTRANSX 0007 2000 01 01T00:00:00 FILTER ­ THICK , THIN , MEDIUM , EBINS NO EMOS2 FILTRANSX 0007 2000 01 01T00:00:00 FILTER ­ THICK ,THIN , MEDIUM , EBINS NO EPN FILTRANSX 0010 2000 01 01T00:00:00 FILTER ­ THICK ,THIN , ... Therefore some re­iteration on all 3 data sets will be necssary. ...

... Meade Series 4000 Nebular Filters incorporate the very latest in interference coatings technology. ... Technical Basis of the Meade Broadband Nebular Filter: As shown in the transmission graph below, the Meade Broadband Nebular Filter strongly rejects the light of sodium- and mercury-vapor lights as well as natural airglow and auroral emissions. ... Meade Series 4000 Narrowband Nebular Filters . ... Meade Series 4000 Oxygen-III Nebular Filters . ... Meade Series 4000 Photo-Visual Color Filters . ...

A limit on the ultra-high-energy neutrino flux from Centaurus A Justin Bray For the LUNASKA collaboration Clancy James, Ron Ekers, Chris Phillips, Paul Roberts, John Reynolds, Rebecca McFadden, Ray Protheroe, Jaime Alvarez-MuЯiz, Justin Bray Outline: · Ultra-high-energy (UHE) cosmic rays neutrinos · Detecting UHE neutrinos · The lunar Cherenkov technique · Observations with the ATCA · Observations with Parkes · ASKAP and the future ... Detection Geometry Neutrinos are penetrating.. ...

The radiation belts around the planets are the interrnal regio