NASAのインスタグラム(nasa) - 8月31日 00時28分

Wings of a Butterfly: The cosmic butterfly is called the Twin Jet Nebula. The glowing and expanding shells of gas clearly visible in this image represent the final stages of life for an old star of low to intermediate mass. The star has not only ejected its outer layers, but the exposed remnant core is now illuminating these layers - resulting in a spectacular light show. The characteristic shape of the wings of the Twin Jet Nebula is most likely caused by the motion of two central stars around each other. It is believed that as the dying star and white dwarf orbit around their common center of mass, the ejected gas from the dying star is pulled into two lobes rather than expanding as a uniform sphere. Meanwhile the nebula's wings are still growing and, by measuring their expansion, astronomers have calculated that the nebula was created only 1,200 years ago.

Credits: ESA/Hubble & NASA, Acknowledgement: Judy Schmidt

#nasa #hubble #nasabeyond #hubble25 #hst #astronomy #butterfly #nebula #science

[BIHAKUEN]UVシールド(UVShield)

>> 飲む日焼け止め！「UVシールド」を購入する