NGCNew General Catalogue(of Nebulae and Star Clusters; astronomy) NGCNational Guideline Clearinghouse(evidence-based clinical practice guidelines; Agency for Healthcare Research and Quality; US Department of Health and Human Services) NGCNumismatic Guaranty Corporation(Sarasota, FL; est. 1987) ...
2005年2月16日｜Antennae Galaxies触角星系，构成触角星系的两个合并的螺旋星系仅在几亿年前才开始相互作用。在合并过程中，将形成数十亿颗恒星。2015年2月17日｜哈勃捕捉到了一场恒星诞生的风暴，照亮了这个矮星系的一端。它被称为木曾 5639 (Kiso 5639)，是一类“蝌蚪”星系的成员，因其明亮的头部和细长的尾巴...
Does learning more about globular clusters help us understand the evolution of galaxies? One of the greatest stories yet to be fully told is how galaxies assemble. We see around us a host of galaxies with billions of stars. But how did they get here, and how did they combine to form ...
If radio galaxies are the product of mergers, does this mean there were fewer radio galaxies in the past? How might astrophysicists look for evidence for this model of radio galaxy evolution? Again, we need to distinguish between the high and the low excitation radio galaxies. The high excita...
In the fringes of the galaxy NGC 1399 lies a globular cluster containing an ultraluminous X-ray source (ULX) thought to be a black hole with a few thousand times the mass of the Sun--a much-sought "intermediate-mass" black hole. A hole ripping a star GatesAir Maxiva ULX liquid-coole...
NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 56,000 light years in diameter and approximately 60 million light years distant. The deepest visible-light image of the universe, the Hubble Ultra Deep Field, contains an estimated 10,000 galaxies in a patch of ...
NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 56,000 light years in diameter and approximately 60 million light years distant. The deepest visible-light image of the universe, the Hubble Ultra Deep Field, contains an estimated 10,000 galaxies in a patch of ...
Figure 1. Fraction of galaxies hosting radio AGN brighter than a given radio luminosity, separated by their stellar mass (shown in different colours). Figure taken from [5]. Radio emission from AGN was separated from starformation using a number of criteria, see paper for details. The solid ...
Sanchez, "PPAK wide-field Integral field spectroscopy of NGC 628--II. Properties of the HII regions derived using integral field spectroscopy [21] extracted from the SDSS DR4 imaging sample selecting galaxies brighter than r < 15.75 mag with redshifts in the range 0.005 < z < 0.025 (select...
Square galaxies: spend some time roping this herd of faint fuzzies in the Great Square of Pegasus It reminds me of the beautiful Chinese dragons carried in parades, its head at the south-southeastern end. Doodles in the sky: from sharks to dogs, hats to rings, these night-sky patterns wi...