A nebula is is an interstellar cloud of dust, hydrogen, helium and other ionized gases. NGC 6302, also called Butterfly Nebula, is a bipolar planetary nebula in the constellation Scorpius. The structure in the nebula is among the most complex ever observed in planetary nebulae.
Thanks to ewejka and CaCrr :)
Today's theme on Sunday Stamps #125 is Stamps with unusual shapes, or unusual size - as its a totally interesting and challenging assignment I have added examples to both my cover and my postcard blog, in hope to cover as much variety as possible (though many have already been posted in previous years..!) If interested you can see other people's posts here: