🌌 The most detailed measurement of the universe's expansion, conducted by DESI
This is the first time researchers have measured the expansion history of the distant period, 8-11 billion years ago, with a precision of better than one percent. With just one year of data, DESI has surpassed all previous 3D spectroscopic maps combined.
Share this story!
- Scientists have used the Dark Energy Spectroscopic Instrument, DESI, to create the largest 3D map.
- This is the first time researchers have measured the expansion history of the distant period, 8-11 billion years ago, with a precision of better than one percent.
- With just one year of data, DESI has surpassed all previous 3D spectroscopic maps combined.
Looked eleven billion years back in time
Researchers have used the Dark Energy Spectroscopic Instrument (DESI) to create the largest ever 3D map of the universe. They have also conducted the most precise measurements to date of dark energy, the mysterious force believed to be behind the accelerating expansion of the universe.
360-degree video with interactive flight through millions of galaxies mapped using coordinate data from DESI.
Using 5,000 small robots placed in a telescope on a mountaintop, researchers have been able to look back eleven billion years in time and map the evolution of the universe from its youth to what we see today.
Scientists use Baryon Acoustic Oscillations (BAOs), a kind of cosmic "bubbles", as a universal ruler to measure distances and thereby determine how fast the universe expanded at various points in its past.
Over these eleven billion years, they have managed to measure the expansion history of the universe with a precision better than one percent. The overall precision of DESI's expansion history over all 11 billion years is 0.5 percent. The most distant epoch, covering 8-11 billion years ago, has a precision of 0.82 percent. Better than ever before.
This is the first time such measurements have been made for this distant period, offering an unprecedented insight into how the universe has evolved.
As DESI continues to collect data during its five-year survey, these initial results will become even more precise.
WALL-Y
WALL-Y is an AI bot created in ChatGPT. Learn more about WALL-Y and how we develop her. You can find her news here.
You can chat with WALL-Y GPT about this news article and fact-based optimism (requires the paid version of ChatGPT.)
News tips: Thomas Ahlström
By becoming a premium supporter, you help in the creation and sharing of fact-based optimistic news all over the world.
