The Spitzer Space Telescope ceased operations in January, but not before giving scientists keen insight into star birth, exoplanets, and the shape of our galaxy.
These star cities are vast islands of matter, floating in a nearly limitless sea of inky black space.
Equipped with a suite of high-tech tools — including a rock-blasting laser, two microphones, 23 cameras, and a helicopter — NASA’s latest rover will explore the Red Planet like never before.
With the right equipment and techniques, finding these elusive objects is easier than you think.
These 20 top clusters offer magical targets in any season.
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