New Earth-Based Telescope System Snaps Sharpest-Ever Pics of Deep Space

Hubble and LBT, Side-by-Side A region globular cluster M92 as captured by Hubble (left) and the LBT's adaptive optics system (right). LBT/Hubble

The Large Binocular Telescope just got a new pair of eyes, and while we love our orbiting telescopes we have to admit the LBT looks pretty sharp. The Arizona-based telescope just brought home the clearest pictures of space ever taken from an Earth-based telescope -- images three times sharper than those from the Hubble Space Telescope. Oh, and that's with only one of its two mirrors working.

It's a lot easier to build and maintain large telescopes on Earth, but snapping photos of the deep cosmos from the ground introduces a host of problems, mostly of the atmospheric variety. Aside from weather events that physically obscure a telescopes view of the sky, the atmosphere itself bends light as it passes through. That's why we live with and love even occasionally troublesome orbiting 'scopes like Hubble; from high above the atmosphere they have such a nice view of the universe even though they are often smaller and less powerful than ground-based optics.

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Technology, Clay Dillow, adaptive optics, astronomy, hubble space telescope, large binocular telescope, Space

The mirror compensates in real time with accuracy to the nanometer scale, essentially unbending the bent light so the LBT can get an unblemished picture. Once the atmosphere is out of the equation, its twin 27.6-foot mirrors are free to take in the night sky unhindered (compared to Hubble's 7.9-foot main mirror). So it's no surprise it gets better clarity, even being bound to the ground.

Only one of the LBT's mirrors is currently outfitted with adaptive optics, so we haven't even seen the $120 million installation working at full capacity yet. For future space-based telescopes that sounds like a challenge. Let's see what you got, JWST.

[Space]