Large Binocular Telescope

Scientists have now measured the original abundance of helium more precisely than ever before.

They used 130 hours of observations from the Large Binocular Telescope and studied 15 unusually pristine galaxies.

These galaxies contain relatively little material produced by later generations of stars.

That makes them something like chemical time capsules.

In an October 20, 2026 article, the University of Minnesota said the measurement reached unprecedented precision and marks a major advance in precision cosmology.

An international research team, including University of Minnesota Twin Cities, scientists used 130 hours of observations on the Large Binocular Telescope, described as one of the world's most powerful telescopes.

The findings are presented across five published papers in the Astrophysical Journal.

The work connects directly to the Big Bang theory, which says the universe began expanding from an extraordinarily hot, dense state approximately 13.8 billion years ago.

You have to be much, much more clever than that.

And this is where the Large Binocular Telescope Primordial Helium Abundance Project enters the picture.

The LBTYP project.

Yes.

So hydrogen emits a specific barcode of light and helium emits a totally different barcode of light?

Precisely.

By capturing the light from these distant galaxies with a massive instrument like the Large Binocular Telescope and running that light through a spectrograph, astronomers can actually split the light into its constituent wavelengths.

Like a prism?