Sahil Aggrawal

गालिब से एक मित्र ने पूछा
परिवर्तन की परिभाषा क्या है ?
गालिब :-
"जो कभी लिपट जाया करती थी बादलों के गरजने पर,
वो आज बादलों से भी ज्यादा गरजती है !"
☺☺

Copy of 3 Idiots :P

With 2017 finally around the corner, the act of changing gears

NASA's Chandra X-ray observatory reveals breeding ground of black holes billions of years ago

About 70 per cent of the objects in the new image are supermassive black holes, which may range in mass from about 100,000 to 10 billion times the mass of the Sun.

NASA said its Chandra X-ray Observatory has obtained an image that gives astronomers the best look yet at the growth of black holes over billions of years beginning soon after the Big Bang.
This is the deepest X-ray image ever obtain