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bubble

We’re All Living in a Bubble (But Not the One You Think)

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We might be living in a bubble. That’s the conclusion of a new paper published in the journal Physics Letters B, due for print publication April 10. The paper is an attempt to resolve one of the deepest mysteries of modern physics: Why don’t our measurements of the speed of the universe’s expansion make sense? As Live Science has previously reported, we have multiple ways of measuring the Hubble constant, or H0, a number that governs how fast the universe is expanding. In recent years, as those methods have gotten more precise, they’ve started to produce H0s that dramatically disagree … Read more

SPACE: Giant Bubbles Spitting Cosmic rays

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Astronomers have discovered a distant galaxy that’s giddily blowing bubbles like a toddler with a glass of chocolate milk. Unlike milk bubbles, however, these two huge galactic balloons are filled with gas, stretch a few thousand light-years across and appear to be crackling with charged particles 100 times more energetic than any found on Earth. Using data from the Hubble Space Telescope and NASA’s Chandra X-Ray Observatory, researchers detected the bubbles jiggling near the center of a galaxy named NGC 3079, located about 67 million light-years away from Earth. Bubbles like these are known as “superbubbles” because, well, they’re supersized. … Read more