... 22.05.2013 . ... It is a rarely seen form of lightning confirmed only about 25 years ago: a red sprite . ... The above image, taken a few days ago above central South Dakota , USA, captured a bright red sprite, and is a candidate for the first color image ever recorded of a sprite and aurora together. ... Red sprites take only a fraction of a second to occur and are best seen when powerful thunderstorm s are visible from the side. ... Publications with keywords: lightning . ... Sprites from Space . ...

Dr. Phil Plait , aka "The Bad Astronomer" . ... Book Reviews . ... Bad Astronomy site . Dr. Plait's first book, Bad Astronomy, sold very well for a science trade, with over 20,000 copies moved. ... The review by astronomer and author Bob Berman for Astronomy magazine . ... A review in the book catalog for the National Science Teachers Association , the professional organization representing 55,000 science teachers . ... A review of the Bad Astronomy website in Science magazine . ...

. Next: Type 13 Up: Images Previous: Images Contents . FITS image cube. The filename is given in model . If a non-zero positive diameter is specified, its value, position angle and axis ratio are used as CLEAN beam parameters which is deconvolved from the image, i.e. the visibilities are divided by ther transform of the Gaussian CLEAN beam. Parameters used: model , diameter , pa , ratio . Christian Hummel 2015-04-28

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2013 May 22 . Red Sprite Lightning with Aurora . ... It is a rarely seen form of lightning confirmed only about 25 years ago: a red sprite . ... The above image, taken a few days ago above central South Dakota , USA , captured a bright red sprite, and is a candidate for the first color image ever recorded of a sprite and aurora together. ...

Multichannel Flare Spectrograph . ... phi - the angle between the green vertical line passing through the solar disk image and the violet radius vector "r" of the object located at the center of the spectrograph slit- red cross. positive - clockwise, negative - counterclockwise . ... mx = x coordinate of the coelostat main mirror . ... x : carthesian solar coordinate alog axis parallel to solar equator (in arcsec) . y : carthesian solar coordinate alog axis parallel to solar axis (in arcsec) ...

Figure 1a. This figure shows the secondary tilts required to correct for transverse flexures of both the telescope truss and the secondary mirror mounts as the telescope changes altitude. ... The circles show the x-tilts of the secondary needed to minimize telescope coma and the squares show the y-tilts required. ... The small negative slope which seen in the y-tilt data is possibly real. ... However, the y-tilt data are very consistent with the y-tilts measured on August 14 (Figure 1a). ...

One of Project ASTRO's primary goals is to help teachers (and . also other types of educators, e.g., youth group leaders) improve their astronomy and science teaching by working closely with someone with special knowledge of astronomy. ... Our first step is to pair interested teachers and astronomers who can commit to work together for the school year and agree to at least four astronomer class visits per school year. ... Project ASTRO Partnerships: . ...

... Pluto movement over 3 days . My first series of images of Pluto taken July 9-11 2012 about 11 pm spaced ~24 hours apart as marked in the cross-hairs. ... I needed to identify Pluto's movement to make a positive ID among the many stars, which was fun to do. 8" EdgeHD telescope, 0.62x reducer, and SBIG ST-8300C camera. 5 minute images. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

Plasma (from Greek plasma- modeled, formed) is a gas with high ionization where the concentrations of positive and negative charges are equal (quasineutrality). ... The high temperature plasma (T~10^B - 10^8R) from the deuterium and tritium is investigated for thermonuclear controlled synthesis. The low temperature plasma (TS 10^5K) is used in different gas discharged devices (gas lasers, plasma generators, plasma engines and others). Back . ...