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In this image from NASA's Spitzer Space Telescope, "cometary knots" on the Helix Nebula show blue-green heads caused by excitation of their molecular material from shocks or ultraviolet radiation.

After tracking a puzzling X-ray signal from a dying star for decades, astronomers may have finally explained its source: The old star might have destroyed a nearby planet. Dating back to 1980, X ...

The Anker Nebula Cosmos 4K SE (not to be confused with the older Cosmos Laser 4K) looks more like a tall car battery with a handle on top than the usual cube that's typical of room-to-room ...

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The signal, which scientists have been working to untangle for more than 40 years, is thought to be the "death knell" of an exoplanet destroyed by a star in the Helix Nebula. Astronomers first ...

Helix’s USP is that it makes a mattress to suit every body type and sleeping style. The Helix Twilight is a firm mattress for side sleepers — which, on paper, sounds like a bit of a dichotomy.

Helix Sleep is offering 25% off sitewide with code MARCH25 during Sleep Awareness Week. All Helix mattresses come with a limited lifetime warranty and a 100-night sleep trial. Experts recommend ...