* Astronomy

While observing stars in our own Milky Way galaxy with the Hubble Space Telescope, astronomers stumbled upon a rare find: a distant galaxy teeming with clusters of stars too dim for most telescopes to see. Curiously, the light from some of these clusters is redder than expected, an observation astronomers are still struggling to explain.
Globular clusters are tight-knit collections of stars that are among the oldest surviving structures in the universe.
Our own Milky Way has at least 158 such clusters. While taking a snapshot of one, Jason Kalirai of the University of California, Santa Cruz, in the US, and colleagues serendipitously captured a rare gem in the background: a distant elliptical galaxy brimming with its own collection of the clusters.
The galaxy and its clusters lie 1.2 billion light years away.

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