This NASA Hubble Space Telescope image features a galaxy cluster called CL0016+1609, or MACS J0018.5+1626, that is very ...

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A stunningly concentrated and hefty galaxy cluster, from a time in the universe's history when such massive structures aren't ...

The universe is more than a smattering of distant stars—it’s also chock-full of other worlds. But if the universe is so crowded, where is the alien life? While there are many theories addressing this ...

The universe is far from homogenous. Rather, stars, and the galaxies that contain them, clump together in some places, brought together by their shared gravitational attraction. Astronomers have ...

This is a tale of rediscovery. I have been an astronomer for more than half a century. My current observing concentrates on showcase nebulae and galaxies or the pursuit of fine lunar detail. But ...

Particles with diameters of a few nanometres or less often have properties that change with the addition of a single atom. Such particles are known as clusters and are of considerable research ...