Analysis of emission lines in gaseous nebulae yields direct measures of physical conditions and chemical abundances and is the cornerstone of nebular astrophysics. Although the physical problem is conceptually simple, its practical complexity can be overwhelming since the amount of data to be analyzed st...
As Humboldt writes, 'I ever desired to discern physical phenomena in their widest mutual connection, and to comprehend Nature as a whole, animated and moved by inward forces.' Volume 1 (1846) investigates celestial and terrestrial phenomena, from nebulae to the temperature of the earth, as ...
We present observations and initial analysis from an HST/STIS program to obtain the first co-spatial, UV-optical spectra of ten Galactic planetary nebulae (PNe). Our primary objective was to measure the critical emission lines of carbon and nitrogen with unprecedented S/N and spatial resolution ...
These two regions can be seen clearly in color images of face-on spirals. The central bulge or bar is yellow indicating older stars, while the bright nebulae and young blue stars formed from gas and dust in the galaxy, trace out the spiral arms within the disk. Dust is also visible in...
The equation of ( ) gives a very accurate description of the cycle of the sun and the moon, the movement of the planets and even the movement of the nebulae and other phenomena of the celestial bodies. A、Newton B、Darwin C、LuJi ...
plane. And for CCD imaging operations the telescope at prime focus can show about 0.86 degree across the diagonal of a common 2/3" detector (such as that employed on some of ourSBIG CCD systems. Optional techniques and hardware permit imaging of galaxies, nebulae, the planets, or of ...
Nonthermal X-Ray Properties of Rotation-powered Pulsars and Their Wind Nebulae We present a statistical study of the non-thermal X-ray emission of 29 young rotation powered pulsars (RPPs) and 22 pulsar wind nebulae (PWNe) by using {\\... XH Li,FJ Lu,AZ Li - 《Astrophysical Journal》 ...
A.How astronomers found the correct interpretation for a certain observation B.How astronomers distinguish between two kinds of nebulae C.Various improvements to the telescope over the last 300 years D.An old problem in astronomy that remains unsolved 点击查看答案 第7题 ● Read the information ab...
and with no doubt see the distinct forms of large Nebulae such as the Veil and North American Nebulae! With a wide angle eyepiece the TeleVue 102 can reveal all three stars of Orion's belt, closer in it reveals the jewel like stars of the Trapezium - a birthplace of stars, with a sw...
At the low to middle magnifications its 1.6X fold increase in light gathering power over the 4 inch Apos provides views and photographs of star clusters, galaxies and nebulae which are striking. While the telescope is also at home in the role of a high magnification, high resolution ...