Sea ice concentration is the percent areal coverage of ice within the data element (grid cell). The plots and color-coded maps are chosen to provide information about the current state of the sea ice cover and how the most current daily data available compare with the record lows and record highs for the same date during the satellite era. Shown below are up-to-date satellite observations of the sea ice covers of both the Arctic and the Antarctic, along with comparisons with the historical satellite record of more than 4 decades. In contrast, in the Antarctic the sea ice coverage has been increasing although at a lesser rate than the decreases in the Arctic. A satellite-based data record starting in late 1978 shows that indeed rapid changes have been occurring in the Arctic, where the ice coverage has been declining at a substantial rate. This results from the high reflectivity (albedo) of the sea ice compared to ice-free waters. It has been a focus of attention in recent years, largely because of a strong decrease in the Arctic sea ice cover and modeling results that indicate that global warming could be amplified in the Arctic on account of ice-albedo feedback. The sea ice cover is one of the key components of the polar climate system. “The world is about to be new again.”Ĭorrection: A previous version of this article gave the incorrect date Stephan’s Quintet was discovered.J. “The James Webb Space Telescope will give us a fresh and powerful set of eyes to examine our universe,” Smith wrote in an update.
Smith has worked on Webb since the project began in the mid-1990s. The initial goal for the telescope was to see the first stars and galaxies of the universe, essentially watching “the universe turn the lights on for the first time,” said Eric Smith, Webb program scientist and NASA Astrophysics Division chief scientist. It will be the deepest humans have ever looked into the universe. Called gravitational lensing, this will create Webb’s first deep field view of incredibly old and distant, faint galaxies. The final target is SMACS 0723, where a massive group of galaxy clusters act as a magnifying glass for the objects behind them. Webb telescope's massive mirror hit by micrometeoroid The giant gas planet, which was discovered in 2014 and has half the mass of Jupiter, completes an orbit around its star every 3.4 days.Īrtist conception of the James Webb Space Telescope, dating to 2019. The spectrum will include different wavelengths of light that could reveal new information about the planet located 1,150 light-years from Earth, such as whether it has an atmosphere. This stellar nursery, where stars are born, is one of the largest and brightest nebulae in the sky and is home to many stars much more massive than our sun.Īdditionally, the first full-color spectrum of an exoplanet, known as WASP-96b, will be shared on Tuesday. One of the targets is the Carina Nebula, located 7,600 light-years away. The targets were selected by an international committee, including members from NASA, the European Space Agency, the Canadian Space Agency and the Space Telescope Science Institute in Baltimore. The first five cosmic targets of Webb were shared by NASA on Friday, providing a teaser for what we can expect to see in the image release. The first image release will highlight Webb’s science capabilities as well as the ability of its massive golden mirror and science instruments to produce spectacular images. 'Deepest image of our universe' ever taken by Webb Telescope will be revealed in July We have some of the most beautiful B-roll footage you've ever seen! Shown here, the James Webb Space Telescope primary mirror illuminated in a dark cleanroom.
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