English Infrared Image of the Planetary Nebula BD+30 3639 This infrared image at a wavelength of 2.2 microns shows radiation from dust grains at a temperature...
English Infrared Image of the Planetary Nebula BD+30 3639 This infrared image at a wavelength of 2.2 microns shows radiation from dust grains at a temperature...
English Optical/Infrared/X-ray comparison for the planetary nebula BD+30 3639 The planetary nebula was formed when a ring of gas and dust was ejected by...
English Optical/Infrared/X-ray comparison for the planetary nebula BD+30 3639 The planetary nebula was formed when a ring of gas and dust was ejected by...