Planetary nebulae form when red giant stars expel their outermost layers as they run out of helium fuel, becoming hot, dense white dwarf stars that are roughly the size of Earth.
NASA’s Webb Space Telescope is finding bright, early galaxies that until now were hidden from view, including one that may have formed a mere 350 million years after the cosmic-creating Big Bang.
A team of Canadian astronomers used the James Webb Telescope to identify the most distant globular clusters ever discovered - dense groups of millions of stars that may be relics containing the first and oldest stars in the universe.
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