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Something isn't quite right in the universe. At least based on everything physicists know so far. Stars, galaxies, black holes and all the other celestial objects are hurtling away from each other ever faster over time. Past measurements in our local neighborhood of the universe find that the universe is exploding outward faster than it was in the beginning. That shouldn't be the case, based on scientists' best descriptor of the universe.
Now, in a new study, published Jan. 22 in the journal Monthly Notices of the Royal Astronomical Society, scientists have measured the Hubble Constant in an entirely new way, confirming that, indeed, the universe is expanding faster now than it was in its early days.
"Something interesting going on"
The path of 13.4 billion year-old photons detected by Europe's Planck spacecraft has been mapped. The Planck Mission was launched on May of 2009.
LCDM - Model - Measurements - Expansion - Rate
That means that either the LCDM model is wrong or the measurements of expansion rate are.
The new method aims to finally settle the expansion-rate debate,Simon Birrer, a researcher at the University of California, Los Angeles, and lead author on the new study, told Live Science.So far, the new, independent measurements confirm the discrepancy, suggesting new physics may be needed.
Hubble - Constant - Scientists - Methods - Supernovas
To nail down Hubble's Constant, scientists had previously used several different methods. Some used supernovas in the local universe (the nearby part of the universe), and others have relied on Cepheids, or types of stars that pulsate and regularly flicker in brightness. Still others have studied the cosmic background radiation.
The new research used a technique that involves light from quasars — extremely bright galaxies powered by massive black holes — in an effort to break the tie.
Matter - Experiment - Effect - Kinds - Tools
"No matter how careful an experiment is, there can always be some effect that is built into the kinds of tools that they're using to...
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