Astronomy Picture of the Day . ... The Heart and Soul Nebulas . ... Possibly not, but that is where two bright emission nebulas nicknamed Heart and Soul can be found. ... Tracking major weather patterns on the Solar System's outermost gas giant can help in the understanding of global weather patterns here on Earth. ... Known to some as the Elephant's Trunk Nebula, parts of gas and dust clouds of this star formation region may appear to take on foreboding forms, some nearly human. ...

... 2008 April 28 . Star Forming Region NGC 3582 . ... Explanation: What's happening in the NGC 3582 nebula? Bright stars and interesting molecules are forming. The complex nebula resides in the star forming region called RCW 57. Visible in this image are dense knots of dark interstellar dust , bright stars that have formed in the past few million years, fields of glowing hydrogen gas ionized by these stars, and great loop s of gas expelled by dying stars. ... About APOD | ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Camera 1 . ... At 0230 in the morning of 23rd of April, a bright fireball was detected by the Armagh Observatory video meteor station. ... The fireball was also detected by Robert Cobain's meteor station in Bangor where its brightness was estimated to be -11. From Armagh, its brightness was comparable to, if slightly less than, that of the Full moon. ... Video Meteor Station . Meteor Log NI . ...

True Color Image Gallery: Galactic SNR | Magellanic Cloud SNR . ... Chandra Proposer's Guide pile up section ] During frame readout, the ACIS CCDs take 40 microsec to (parallel) transfer the charge by one pixel. As a result of this, each frame readout, each pixel is exposed for 40 microsec to a source (plus cosmic X-ray background) at each location along its column. ... Note also that the image does not just trail, it extends along the whole column. ... Chandra Supernova Remnant Catalog . ...

One of the first light images taken on April 22, 1998 in 195 Angstroms . Loops viewed on April 25, 1998, seen in 171 Angstroms. ... Active Region seen on April 26, 1998 in 171 Angstroms . ... Flare observed in 1216 Angstroms on May 19, 1998 . ... Post flare loop observations on August 16, 1998 observed in 171 Angstroms . Post flare loop observations on August 16, 1998 observed in 195 Angstroms . ... Active regions observed on August 19, 1998 in 171 Angstroms . ...

... User Guide ] Task: moment Purpose: Calculate moments of a Miriad image. ... Key: in The input image. No default. ... Key: mom -3: Velocity at peak intensity using a three-point quadratic fit around the peak (km/s). 2: Peak intensity using a three-point quadratic fit (units same as individual channels). ... The moments are calculated independently for each pixel using spectral channels with intensity satisfying the specified clip range. ... Key: axis Axis for which the moment is calculated. ...

... Sun images . ... Sun flares . ... Active areas . April : 2016 . ... The following regions with sunspots can be now observed on the Sun's surface . Group number . ... Group length (in degrees) . ... Coordinates and other characteristics of active regions are issued for April 09, 2016 00:31 UT The following H-alpha plages without spots can be currently observed on the Sun's surface . ... Coordinates and other characteristics of active regions are issued for April 09, 2016 00:31 UT . ...

... Authors: Laurent Loinard 1 2 , Ronald J. Allen 1 We present new interferometric 12 CO(1-0) and single-dish 12 CO(3-2) observations of the central parts of D478, a large (> 200 pc) dark dust cloud located in a quiescent region in the inner disk of M31 where single-dish 12 CO(1-0) and 12 CO(2-1) observations were previously obtained. Only a small fraction (< 15%) of the 12 CO(1-0) flux previously detected in this region with the single-dish telescope is recorded by the interferometer. ...

... a major flood of the entire Upper Mississippi River basin which resulted in very wide spread agricultural and commercial damage. On August 10, an enormous plume of turbid river water was detected extending eastward from the Mississippi River delta region. River water discharged on the western side of the delta flowed eastward around the south side of the delta, joining additional river water discharged from passes on the south and east sides of the delta. ...

... rgsregions defines and constructs the various RGS event-selection regions, and adds them to the source list (see rgssources ). ... Image regions and the background region refer to the plane of dispersion versus cross-dispersion ( image plane ) and select events based on their spatial coordinates. ... The order regions refer to the plane of dispersion versus calibrated pulse-height ( energy plane ) and select events from a specific astrophysical source within a particular reflection order. ...

... Contacts . 2010: . Sources of polarized radiation with unusual spectral features discovered in the Sun. In the framework of the study of solar active regions that produce powerful flares the researchers from the RATAN-600 radio telescope have detected sources with features in the form of a sharp decrease in the intensity of polarized radiation in various parts of the recorded frequency range (2-16GHz), sometimes changing the sign of polarization. ... Contacts: Bogod V.M. ) . Archive . ...

... Here are some general thoughts about the role of Mark5 recording in pulsar experiments. Pulsar work with the Mark5 Backend: Advantages: Flexibility: Set frequency time resolution after observations, enabling multiple analyses of the data. ... We can use the Mark5 recorders to gauge stability of the other pulsar timing backends: at multiple telescopes, and multiple epochs). ... The properties of these features changes as the scattering medium changes on day-month time scales. ...