John Carlsen has more than a decade of experience testing and reviewing home tech products, with a major focus on smart home security. He earned his BS in journalism from Utah Valley University.

A dazzling spiral galaxy and a brilliant foreground star create an illusion of proximity in a breathtaking new Hubble image. The star, much closer to Earth, stands out with its four diffraction spikes ...

Since they were first detected over four decades ago, unusually powerful x-ray emissions originating from the site of a dying star called the Helix Nebula have proved an enigma astronomers. Now, we ...

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.

The Orion Nebula is a picture book of star formation, from the massive, young stars shaping the nebula to the pillars of dense gas that may be the homes of budding stars. The star V830 Orionis shines ...

Astronomers may finally have settled the question of what is causing highly energetic X-rays from WD 2226-210, a white dwarf star located at the center of the Helix Nebula. The Helix Nebula is a ...

Space scientists say they have located a planet killer capable of ripping worlds to pieces. Researchers believe they've found evidence that a white dwarf may have torn a Jupiter-sized planet apart. A ...

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 ...

Fly about 2,600 light-years to Hubble Space Telescope imagery of the Cygnus loop nebula. See images from 2001 and 2020. Credit: NASA, ESA, STScI Acknowledgments: NSF's NOIRLab, Akira Fujii , Jeff ...

What are you, SIMP 0136? Astronomers used the powerful James Webb Space Telescope to peer into this object flying by itself through our Milky Way galaxy. It's rapidly spinning, and at some 13 ...

What are you, SIMP 0136? Astronomers used the powerful James Webb Space Telescope to peer into this object flying by itself through our Milky Way galaxy. It's rapidly spinning, and at some 13 times ...