On January 26, 2024, NASA shared an image of a “bridge of stars” that appears to connect two galaxies, Arp 295a and 295c. The image shows the two galaxies growing into each other, with a 250,000 light-year-long streamer of stars stretching from one galaxy to another. The streamer is surrounded by a milky-colored array of gas and dust. 

The streamer is known as a tidal tail, which is an elongated stream of stars and interstellar dust that forms when two galaxies in a group circle each other. The pair of galaxies have been interacting since long before humans existed and will continue to interact for tens of millions of years. It’s not clear if the pair will eventually merge.

The bridge between the pair is faint in these images, but it’s there in the lower right corner of the Hubble image, and young bright blue stars highlight it. The bridge feeds gas back and forth between the galaxies, fuelling star formation. However, the same interactions can sometimes quench star birth

In January 2024, NASA shared an image of a 250,000-light-year-long bridge of stars that appears to connect two galaxies, Arp 295a and 295c. The image shows Arp 295a, an edge-on galaxy, in the center, and Arp 295c, a smaller, bluer face-on spiral, to its right. The bridge is created when the two galaxies orbit each other, drawing out gas, dust, and stars. The bridge feeds gas back and forth between the galaxies, fueling star formation

The Hubble Space Telescope has captured an image of a bridge of stars and gas connecting two galaxies. The bridge is 250,000 light-years long and is located in the Arp 295 galactic grouping. The galaxies have passed close enough together that their mutual gravitational attraction has birthed many new stars. These young stars are visible in the faint bridge connecting the two galaxies. 

The bridge provides an avenue for the two galaxies to continue sharing the gas and dust that become new stars. The interactions between massive galaxies like these can trigger star birth in the streams of gas and stars that bridge the galaxies. 

The Hubble Space Telescope was launched into orbit by space shuttle Discovery on April 24, 1990. Hubble orbits about 332 miles above Earth. It is the length of a large school bus and weighs as much as two adult elephants. The telescope captures pictures of our universe to help scientists on Earth understand it better.

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