NASAのインスタグラム(nasa) - 9月7日 09時02分

You’re looking at a cosmic collision!
Our @NASAChandraXray observatory discovered this ring of black holes or neutron stars in a galaxy 300 million light years from Earth.
Astronomers think that this ring of black holes was created when one galaxy was pulled into another galaxy by the force of gravity. The first galaxy generated ripples in the gas of the second galaxy, located in the lower right. These ripples then produced an expanding ring of gas that triggered the birth of new stars. The first galaxy is possibly the one located in the lower left of the image.

All of the X-ray sources detected in the ring are bright enough to be classified as ultraluminous X-ray sources. This is a class of objects that produce hundreds to thousands of times more X-rays than most "normal" binary systems in which a companion star is in orbit around a neutron star or black hole.
The most massive of these fledgling stars will lead short lives — in cosmic terms — of millions of years. After that, their nuclear fuel is spent and the stars explode as supernovas leaving behind either black holes with masses typically between about five to twenty times that of the Sun, or neutron stars with a mass approximately equal to that of the Sun.

This ring of black holes may help scientists better understand what happens when galaxies smash into one another in catastrophic impacts.

Credit: NASA/CXC/INAF/A. Wolter et al; Optical: NASA/STScI

#nasa #solarsystem #science #cosmos #blackholes #galaxy #stars #beautiful #pictureoftheday #xray #universe #astronomy

[BIHAKUEN]UVシールド(UVShield)

>> 飲む日焼け止め！「UVシールド」を購入する

• NASAChandraXray