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The Halo and Rings of the Planetary Nebula NGC 40 in the Mid-Infrared
the Planetary Nebula NGC 40 the Mid-Infrared
2011/1/10
We present imaging and spectroscopy of NGC 40 acquired using the Spitzer Space Telescope (Spitzer), and the Infrared Space observatory (ISO). These are used to investigate the nature of emission from ...
Formation of a two-dense-rings-pattern disk from the collapse of a cloud
two-dense-rings-pattern disk cloud
2009/7/9
Formation of a two-dense-rings-pattern disk from the collapse of a cloud。