哈勃望远镜是哪国的 哈勃望远镜见证恒星死亡时的灿烂画面

哈勃望远镜见证恒星死亡时的灿烂画面  

Nothing rages against the dying of the light harder than a star. Their death throes are wild and violent as the star is wracked with colossal quakes
throwing vast amounts of stellar material out into the surrounding space.
Studying the gas and dust thrown off in such events can help us understand how these stars die ... and now Hubble has studied in greater detail than ever before o of the dustiest
gassiest star deaths in the galaxy.
They're o plaary nebulae (so named because initially
these objects were first described as pla-like in the 18th century) called NGC 6303
or the Butterfly Nebula
and NGC 7027. And Hubble has used the full wavelength range of its Wide Field 3 camera - from near ultraviolet to near-infrared - to study the turbulent processes within them.
这两个行星状星云（取这个名字是因为最初在18世纪时说这些物体外观类似行星）名为NGC 6303，也叫蝴蝶星云，和NGC 7027。哈勃利用第三代广域照相机的全波长范围，即从近紫外到近红外的范围，研究星云内部的湍流过程。
"When I looked in the Hubble archive and realised no one had observed these nebulae with Hubble's Wide Field Camera 3 across its full wavelength range
I was floored
" said astronomer Joel Kastner of Rochester Institute of Technology in New York.
"These new multi-wavelength Hubble observations provide the most prehensive view to date of both of these spectacular nebulae. As I was downloading the resulting images
I felt like a kid in a candy store."
Both nebulae are probably descended from progenitor stars around three to five times the mass of the Sun; these progenitors collapsed into white dwarfs when they died. (Stars more massive than eight solar masses bee neutron stars; and stars greater than 30 solar masses bee black holes.) And both have high ionisation and excitation
indicating the stars inside them are very hot.