The Hubble Space Telescope’s Advanced Camera for Surveys captured this stunning image of the globular cluster NGC 1783, a spectacular collection of suns in the Large Magellanic Cloud some 160,000 light years from Earth with a total mass of about 170,000 times that of the Sun. Based on the colour and brightness of its stars, NGC 1783 is thought to be less than 1.5 billion years old, a relative youngster when it comes to globular clusters. It is thought to have undergone at least two episodes of star formation 50 million to 100 million years apart.
Astronomers using observations from the NASA/ESA Hubble Space Telescope and NASA’s Chandra X-ray Observatory have studied how dark matter in clusters of galaxies behaves when the clusters collide. The results show that dark matter interacts with itself even less than previously thought, and narrows down the options for what this mysterious substance might be.
The placid appearance of NGC 4889 can fool the unsuspecting observer. But the elliptical galaxy, pictured here in front of hundreds of background galaxies, and deeply embedded within the Coma galaxy cluster in this new image from the NASA/ESA Hubble Space Telescope, harbours a dark secret. At its heart lurks one of the most massive black holes ever discovered.
A ghostly “head” stares out from the depths of space in this Hubble Space Telescope image of two galaxies crashing into each other 704 light years away, a captivating harbinger of Halloween. The photo was captured in an ongoing survey of interacting galaxies to learn more about how such systems evolve.