# Dark energy flips its sign, but the Hubble tension refuses to budge

> **Newsylist Open Intelligence Dossier** · First detected: 2026-07-11 04:29 UTC · Category: Science · Sources: 5 · Current Velocity: 2.8

## Executive Summary
New data suggests dark energy may not be constant, though the persistent Hubble tension remains an unresolved cosmic mystery.

## Intelligence Brief
Recent measurements indicate that dark energy may have flipped its sign and that the expansion of the universe is non-constant. Despite these hints, researchers maintain that the expansion of the universe is still accelerating.


Coverage from Phys.org, Quantum Zeitgeist, and The Japan News emphasizes the fluctuating nature of expansion and the stubborn persistence of the Hubble tension. Technology Org and Universe Today highlight the methods used, including the analysis of a neutron star merger to measure the rate of cosmic expansion.


Future focus remains on whether these new measurements will bring a closer understanding of the universe's expansion rate and if the Hubble tension can be resolved.

## Verified Facts & Key Claims
### What is the current status of the universe's expansion?
According to The Japan News, researchers say the expansion of the universe is still accelerating.

### What method was used to measure cosmic expansion in recent reports?
Universe Today reports that astronomers used a neutron star merger to conduct the measurement.

### What does the Dark Energy Survey data suggest?
Quantum Zeitgeist reports that the data hints at a non-constant expansion.

## Key People, Organizations & Locations
Hubble, Expansion Is Still Accelerating Researchers Say, Dark Energy Survey Data Hints At Non-Constant Expansion, Astronomers Use, Neutron Star Merger, Measure Cosmic Expansion

## Multi-Source Evidence Table
| Source Outlet | Headline | Published (UTC) | Verification URL |
|---|---|---|---|
| Technology Org | New measurement brings us closer to understanding the Universe’s rate of expansion | 2026-07-10 21:40 | [Source Link](https://news.google.com/rss/articles/CBMivAFBVV95cUxOaEh4UTZkc0c0a1RRWl96MUVVeFF6emdWMlhkYnBhRWJqUG1zQjZEOUxnZDdBS3B5VGhtbVJjQUY5NFV6WU13VTY3VjF6Q3FlTC1EV01lQm80NUNad0Z3SlRNVHZiU285U2QwY2U5TjlYbUxGRVg2RjZDSVIyNWhpbmxnSnI2MldtMXY4UkFIUXN2QkhaRng4TEEtNlR1eG84aGtIbTdQVktTQldwU2RWdFJpN1FBZ3J5cmlJbg?oc=5) |
| The Japan News | Yes, the Universe’s Expansion Is Still Accelerating, Researchers Say | 2026-07-10 21:40 | [Source Link](https://news.google.com/rss/articles/CBMiekFVX3lxTFA2N0dkZDJ1czYzcmlOVXB5ZEN4dFFxR1BabW96T09zbTNocjlUUUljR3ZFbmY0NzczOFhfUURRWTkzaFpMM0VCTWhmd1Z1aXR4dDhLYnRvR01vYm1tdURNMVJSZ2xxaHdyOFp6NDVQSzlidHZpS1NuaVNB?oc=5) |
| Quantum Zeitgeist | Dark Energy Survey Data Hints At Non-Constant Expansion | 2026-07-10 21:40 | [Source Link](https://news.google.com/rss/articles/CBMia0FVX3lxTFBxNXVyc2xvaVNMcGNHLURuQkVBQVpPN0p2cGg0c2ZOem1vQVFMVVhoVFQ5U0M3cHJSbFdlRTdWQTN6VlJWUHA4bXYyVnJQbDhPNndLVlhmb1hjaVpGc0NDbGcyUEh6R01yWlBz?oc=5) |
| Universe Today | Astronomers Use a Neutron Star Merger to Measure Cosmic Expansion | 2026-07-10 21:40 | [Source Link](https://news.google.com/rss/articles/CBMipwFBVV95cUxPTC11MGRGdHNOYlZxaXBSNG5yWFdXM1EteEZwVkIyQlpaRXp2M2dFQXUwdDZlRHhfTlpVV0QwbkJDQjBHZmF5aVYwTkQ4SUQ3aGxXNV80d1RaUjFzbVpMZWxMbzBiSkM5RUIyNlhEdG5aUHZsdUZoQ21ZMDZ0dzNmeVU4MmtIZGItcXlVQjhfYTNXaFBva3hiWWVJaU5Eem12OGppb1FvSQ?oc=5) |
| Phys.org | Dark energy flips its sign, but the Hubble tension refuses to budge | 2026-07-10 21:40 | [Source Link](https://news.google.com/rss/articles/CBMidkFVX3lxTE9EMEgzZUtCZHl4WXpKbEpZOTRrUTNUYzRGQU9iYnJpWDctbzlabUUzY3NHZDlxQ19NRlM1N1JmYXFUOTFZdHh4SlhhbU9NLXdkaDZBR21QOHB3TzEwaG1OMFhBNWJmMFZPUlp6ZEIwZW81aHJKM2c?oc=5) |

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