Space Science
Astronomers have discovered four exceptionally low-density planets orbiting a 20-million-year-old star named V1298 Tau, offering insights into the formation of common planetary systems. These worlds, with densities akin to polystyrene, are seen as precursors to super-Earths and sub-Neptunes. The findings, based on five years of observations, highlight a young version of systems prevalent across the galaxy.
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Astronomers have observed a rare system where three supermassive black holes in merging galaxies are combining into one. All three black holes are actively feeding and emitting radio waves, providing a unique glimpse into complex cosmic mergers. This discovery, led by researchers using radio observatories, sheds light on how such massive objects grow.
A new analysis indicates that the moon's South Pole-Aitken basin, its oldest and largest crater, likely formed from an asteroid impact originating from the north rather than the south. This finding challenges previous assumptions about the moon's early history. The discovery could enhance the value of NASA's upcoming Artemis III mission to the basin's rim.