The universe is vast, mysterious, and breathtakingly beautiful. From the glow of distant galaxies to the quiet elegance of ...

The image of nearby galaxy Messier 81 was captured by NASA's Spitzer Space Telescope. The galaxy is located in the northern constellation of Ursa Major (which also includes the Big Dipper).

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The modular, ultra-low-noise simultaneous source and measure system enables connections to up to three remote source modules and up to three measure modules per single half-rack M81-SSM-6 instrument .