Using data from the Hubble Frontier Fields program, a team of astronomers has produced a study that indicates how globular clusters could be the remnants of dwarf galaxies from the early Universe.
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Some galaxies shine with a red ghostly glow. Once these galaxies stop forming new stars, they can only host long-lived stars with low masses and red optical colors. Astronomers often call these ghostly galaxies “red and dead.” But the basics behind why some form so quickly is still a mystery. “It is one of the […]
In a patch of sky 3.5 billion light-years away there are hazy elliptical galaxies, colorful spirals, blue arcs and distorted shapes seen clumping together. It’s the result of a vast cosmic collision that took place over the course of 350 million years. The mess is a treasure trove of information for astronomers, allowing them to […]