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ΠΗΓΗ: ESA: OBSERVING EARTH 18 October 2019 The Copernicus Sentinel-1 and Sentinel-2 satellites have revealed new cracks, or rifts, in the Pine Island Glacier – one of the primary ice arteries in the West Antarctic Ice Sheet. The two large rifts were first spotted in early 2019 and have each rapidly grown to approximately 20 km in length.  Mark Drinkwater, Head of the Earth and Mission Sciences Division at ESA, says, “These new rifts appeared very soon after last year’s major calving of iceberg B46. Sentinel-1 winter monitoring of their progressive extension signals that a new iceberg of similar proportions will soon be calved.” Pine Island Glacier, along with its neighbour Thwaites glacier, connect the centre of the West Antarctic Ice Sheet with the ocean – together discharging significant quantities of ice into the ocean. These two glaciers have been dramatically losing ice over the last 25 years. Owing to their extremely remote location, satellites play a critical ...

ΠΗΓΗ: https://www.brainscape.com Physics is a key science that helps us understand the world around us. It explains why the world works as it does and defines every interaction, big or small. Seemingly unconnected phenomena can be unified only using physics. Since physics defines so much in our lives, it’s important to recognize the modern physicists who have been working to discover more about the physical world. With that, we share with you just some of the greatest modern physicists, as well as their discoveries that have changed the way we see the world. 6 of the Greatest Modern Physicists 1. Stephen Hawking Stephen Hawking has been widely recognized as one of the best minds in physics today and has won many titles for his achievements, including the Presidential Medal of Freedom, the highest civilian award in the U.S. Of his many notable theories, Hawking is most famous for developing the theory that black holes emit radiation (known as Hawking radiation) and his work on...