NASA finds tiniest galaxy has 'supermassive' black hole

Astronomers led by an Indian-origin scientist have discovered a monster black hole lurking inside one of the tiniest and densest galaxies ever known located 54 million light years from Earth.
Though the black hole is five times the mass of the black hole at the centre of our Milky Way, it is inside a galaxy that crams 140 million stars within a diameter of about 300 light-years, only 1/500th of our galaxy's diameter.

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NASA Reveals New Results From Inside the Ozone Hole

NASA scientists have revealed the inner workings of the ozone hole that forms annually over Antarctica and found that declining chlorine in the stratosphere has not yet caused a recovery of the ozone hole. More than 20 years after the Montreal Protocol agreement limited human emissions of ozone-depleting substances, satellites have monitored the area of the annual ozone hole and watched it essentially stabilize, ceasing to grow substantially larger. However, two new studies show that signs of recovery are not yet present, and that temperature and winds are still driving any annual changes in ozone hole size.

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