3.2 Gigapixels

I can remember when reviews of digital cameras (including phone cameras)
would decry the emphasis on more and more megapixels, saying there were
other factors that went into the quality of the image, too.

Well, astronomers might beg to disagree. They have just commissioned the
world’s highest-resolution digital camera, at 3.2 gigapixels, as part of
the Vera C Rubin telescope in the Atacama Desert in Chile.

Who was Vera Rubin? She collected data on the peculiar movements of stars
in the outermost parts of galaxies that led to the inescapable conclusion
that 90% of the Universe is made of “dark matter” -- matter we cannot see
directly, but whose gravitational influence can be seen in those stars.