NASA has discovered that the number of galaxies is much smaller than previously thought

NASA has revealed that there are far fewer galaxies in the universe than previously thought.

New measurements by NASA’s New Horizons spacecraft put the numbers in the hundreds of billions, instead of the previously reported two trillion.

The results indicate that the universe may be much less crowded than previous estimates suggested.

The Milky Way is perhaps one of the only billions of galaxies in the universe, and not the trillions of galaxies as previously estimated.

Estimate the number of galaxies

NASA is heading towards the New Horizons spacecraft, which sees the surrounding sky 10 times darker than the darkest sky seen by Hubble.

To estimate the number of existing galaxies, the team analyzed existing images from New Horizons.

To evoke the faint background glow in some images, NASA had to remove the starlight from the Milky Way that was reflected off the camera.

Fortunately, the remaining signal was almost measurable, allowing a more precise estimate of the number of galaxies.

In the study, NASA took further measurements of the faint backlight of invisible galaxies.

“That’s an important number to know – how many galaxies are there? We just don’t see the light of two trillion galaxies, ”said Mark Postman of the Space Telescope Science Institute in Baltimore and lead author of the study.

Previous estimates were based on deep sky observations by NASA’s Hubble Space Telescope.

However, Hubble relied on mathematical models to estimate the number of galaxies, as many galaxies were believed to be outside the ability of the space telescope to detect in visible light.

Unfortunately, Hubble is still plagued by light pollution due to its location in the inner solar system.

To work around this problem, NASA turned to its New Horizons spacecraft, which sees a surrounding sky 10 times darker than the darkest sky seen by Hubble.

“These types of measurements are very difficult,” said Tod Lauer of NOIRLab to NSF, lead author of the study. Many people have tried to do this for a long time.

“New Horizons has given us an advantage to better measure the cosmic visual background than anyone else has been able to.”

NASA turned to the New Horizons spacecraft, which sees a surrounding sky 10 times darker than the darkest sky seen by Hubble.

To estimate the number of existing galaxies, the team analyzed existing images from New Horizons.

To evoke the faint background glow in some images, NASA had to remove the starlight from the Milky Way that was reflected off the camera.

Fortunately, the remaining signal was almost measurable, allowing a more precise estimate of the number of galaxies.

NASA is now planning to conduct a follow-up study with the upcoming James Webb Space Telescope.

“NASA’s upcoming James Webb Space Telescope could help solve the mystery,” NASA said. “If individual galaxies are weak as the cause, then Webb’s ultra-deep field observations should be able to detect them.”

This study is accepted for publication in The Astrophysical Journal.

What is the GALAXY beast?

Brutal galaxies, also known as star galaxies, are believed to be the ancestors of massive galaxies like the Milky Way in the world today.

Old bodies appeared shortly after the Big Bang and are characterized by rapid star formation and massive growth, as new stars are born at rates thousands of times higher than in our galaxy.

The result is small but incredibly dense galaxies that quickly burn up all of their cosmic gas – the “fuel” used to create new stars.

Once they use this gas, about 100 million years after birth, they become calm or “red and dead” galaxies – common in our universe today.

Scientists hope that studying mysterious objects will provide answers to key questions about the formation and evolution of modern galaxies, such as the Milky Way.

Brutal galaxies, also known as star galaxies, are believed to be the ancestors of massive galaxies like the Milky Way in the world today. This image is an artist’s impression of ZF-COSMOS-20115, a brutal galaxy discovered in 2017.

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