The Epoch of Reionization

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1. James Webb Space Telescope:

Using the unique infrared sensitivity of NASA’s James Webb Space Telescope, researchers can examine ancient galaxies to probe secrets of the early universe. Now, an international team of astronomers has identified bright hydrogen emission from a galaxy in an unexpectedly early time in the universe’s history. The surprise finding is challenging researchers to explain how this light could have pierced the thick fog of neutral hydrogen that filled space at that time.

The Webb telescope discovered the incredibly distant galaxy JADES-GS-z13-1, observed to exist just 330 million years after the big bang, in images taken by Webb’s NIRCam (Near-Infrared Camera) as part of the James Webb Space Telescope Advanced Deep Extragalactic Survey (JADES). Researchers used the galaxy’s brightness in different infrared filters to estimate its redshift, which measures a galaxy’s distance from Earth based on how its light has been stretched out during its journey through expanding space. (Source: science.nasa.gov)

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2. President Trump stressed his desire for the US to annex Greenland ahead of a contentious visit by his vice president, comments likely to further stoke anger in the Danish territory. Trump said Wednesday that the mission of Vice President Vance and others on his team would be “to let them know that we need Greenland for international safety and security.” “It’s an island that from a defensive posture, and even offensive posture, is something we need, especially with the world the way it is, and we’re going to have to have it,” the president said during an interview with conservative talk show host Vince Coglianese. The remarks are Trump’s clearest statements yet about the intent of a flurry of visits from his orbit since he won the 2024 presidential election. (Source: bloomberg.com)

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3. Mr. Trump signed an order to implement a 25% tariff on auto imports, expanding a trade war designed to bring more manufacturing jobs to the US and setting the stage for an even broader push on levies next week. “What we’re going to be doing is a 25% tariff on all cars that are not made in the United States,” Trump said at the White House on Wednesday, casting the measure as “very modest.” “We’re going to charge countries for doing business in our country and taking our jobs, taking our wealth, taking a lot of things that they’ve been taking over the years,” he added. Trump said the tariffs would go into effect on April 2 and that the US would start to collect them a day later. The tariffs will be on top of levies already in place, White House Staff Secretary Will Scharf said, and the administration projects that the tariffs would result in $100 billion of new annual revenue to the US. (Source: bloomberg.com)

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