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Supermassive black holes are merging in the galaxy system ZS7

Tuesday, May 21, 2024 by

Astronomers have provided evidence for an ongoing merger of two galaxies and their massive black holes when the universe was just 740 million years old, using observations from the James Webb Space Telescope (JWST). This groundbreaking discovery highlights a significant period in cosmic history, revealing the farthest and earliest detection of merging black holes to dat...


Removing star spikes with Cuiv the Lazy Geek

Thursday, May 16, 2024 by

Star spikes, also known as diffraction spikes, are lines radiating from bright stars in images taken with Newtonian telescopes. They occur because of diffraction of light around the secondary mirror's support vanes, also known as the spider vanes. Refracting telescopes, which lack any central obstruction, do not suffer from star spikes and generally offer higher ...