Vera Rubin Observatory detects one of the smallest and faintest satellite galaxies ever seen — before the telescope's mission even began

Before the Vera Rubin Observatory officially opens its eyes, it has already glimpsed something astronomers thought would remain hidden for years: a galaxy so small and dim that finding it suggests the telescope will reshape our understanding of the cosmos far faster than anyone expected. The discovery hints that the universe may be teeming with miniature galaxies we've simply never been able to see until now, potentially upending models of how galaxies form and evolve. If early results like these are any indication, one of the most expensive scientific instruments ever built may fundamentally rewrite astronomy within its first months of operation.

Live Science·Sep 22