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��� JFIF ,, ���Exif MM * j z � �( 1 �2 �i tThis artist’s impression shows two tiny but very dense neutron stars at the point at which they merge and explode as a kilonova. Such a very rare event is expected to produce both gravitational waves and a short gamma-ray burst, both of which were observed on 17 August 2017 by LIGO–Virgo and Fermi/INTEGRAL respectively. Subsequent detailed observations with many ESO telescopes confirmed that this object, seen in the galaxy NGC 4993 about 130 million light-years from the Earth, is indeed a kilonova. Such objects are the main source of very heavy chemical elements, such as gold and platinum, in the Universe. , , Adobe Photoshop 7.0 2023:02:06 16:26:14 � 0221� ^� �� � f� 2020:06:16 13:53:55 � �( � ! H H ��� JFIF H H �� Adobe_CM �� Adobe d� �� � �� _ �"