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The Sputnik Planitia is a 1 000 km (621.4 miles) wide basin situated in the heart-shaped region of the Pluto's surface. Its current location seems to have resulted from the accumulation of frozen nitrogen ice, which caused the planet to change its spin, in the so-called polar wander process and created cracks and tension in the crust.

Credit: NASA

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Webb Reveals Colors of Earendel, Most Distant Star Ever Detected

Discovered by Hubble, Earendel is the farthest star ever detected. It existed in the first billion years after the big bang! The James Webb Space Telescope now shows it to be a massive B-type star, more than twice as hot as our Sun and about a million times more luminous. It’s only detectable thanks to its alignment with a galaxy cluster between Earendel and us. The cluster’s gravity bends light, magnifying what is behind it — in the case of a star-sized object like Earendel, by a factor of at least 4000. Based on the colors of the light of Earendel, astronomers think it may have a cooler companion star.

Webb is also able to see other details in Earendel’s host galaxy, the Sunrise Arc — the most highly magnified galaxy yet detected in the universe’s first billion years. Those features include both young star-forming regions and older, established star clusters as small as 10 light-years across.

Credit: NASA