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Tag: Hubble

Hubble, Gaia produce most precise measure of universe's expansion rate

Hubble, Gaia produce most precise measure of universe's expansion rate

Science
July 12 (UPI) -- By combining the observations of the two most powerful space telescopes in orbit, scientists have achieved the most precise measurement of the Hubble constant, the universe's expansion rate. The new measurement confirms the tension between explosion rate in the early and late universe, researchers report. Astronomers can measure the expansion of the universe by measuring a galaxy's redshift, a change in the wavelength of the light due to a change in the velocity of the object. By measuring the redshift of galaxies using the Hubble Telescope, scientists have established the Hubble constant. But investigations of the cosmic microwave background, the oldest radiation in the universe, can also be used to predict the universe's expansion rate. Maps of the microwave signature ...
NASA shares new Hubble image of blue-threaded galaxy

NASA shares new Hubble image of blue-threaded galaxy

Science
June 8 (UPI) -- A new Hubble image, shared this week by NASA, offers one of the best views yet of the nearby active galaxy IC4870. The galaxy is nicely framed by foreground stars and background stars. In the middle, positioned 28 million light-years from Hubble's lens, is IC 4870. The active galaxy is a Seyfert galaxy, which boast extremely bright nuclei, similar to quasars. They are some of the most luminous objects in the sky. Surrounding the bright center are streaks of electric blue gas, molecular clouds fueling the births of new stars. Hubble has imaged IC 4870 as part of previous surveys of nearby active galaxies -- galaxies that are actively forming new stars -- but has yet to produce such a clear and captivating photo of the galaxy. By imaging the active nuclei of nearby galaxies...
Hubble telescope has helped scientists better understand the cosmos

Hubble telescope has helped scientists better understand the cosmos

Science
April 20 (UPI) -- Today, astronomers know the age and size of the universe with greater certainty and precision than they did 28 years ago -- and it's all thanks to the Hubble Space Telescope."When I was a grad student 30 years ago, we were arguing about the size and scale of the universe," NASA scientist Dr. Jeff Hayes told UPI.Hayes has said those arguments featured estimates differing by a factor of two."Today, thanks to Hubbles' observations, we are down to a couple of percent," he said.Hubble was designed to measure the size and age of the universe, as well as the rate of its expansion, and it succeeded in doing just that. According to Hayes, this was Hubble's biggest breakthrough.Hubble was launched on April 19, 1990. The telescope celebrated its 28th anniversary, or birthday, on Thu...
Hubble serves up two views of Lagoon Nebula

Hubble serves up two views of Lagoon Nebula

Science
April 19 (UPI) -- The Hubble Space Telescope celebrated its 28th anniversary with a double portrait of the Lagoon Nebula, a giant, oft-photographed interstellar cloud.The juxtaposed images, released Thursday by NASA, showcase the emissions nebula in two different spectral bands: one in visible light and the other rendered in near-infrared.The visible-light image showcases the nebula's gas and dust, while the near-infrared photograph reveals the multitude of stars found within.The two images reveal the two ingredients that make nebulas what they are: star-forming material and stars.Gas and dust are essentials to stellar formation, and as they fuel the formation of new stars, stellar winds contort the surrounding star-forming materials into a variety of textures and shapes -- nobs, columns, ...
Hubble captures glow of giant galaxy cluster

Hubble captures glow of giant galaxy cluster

Science
April 13 (UPI) -- A new image from the Hubble Space Telescope showcases a massive galaxy cluster, a web of thousands of galaxies tied together by the tug of gravity.The galaxy cluster featured in the image is named PLCK G308.3-20.2. Like an ecosystem full of biodiversity, the cluster is home to wide range of galaxies -- all different types, shapes and sizes.This particular galaxy cluster is situated 5 billion light-years away from Earth.As recently as a few decades ago, astronomers thought galaxy clusters were the largest structures in the universe, but in the 1980s, scientists realized galaxy clusters were organized into structures called superclusters.Superclusters are made of groups of clusters that can stretch hundreds of millions of light-years across. Some superclusters cover as much...