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There are about 51 galaxies in the Local Group (see list of nearest galaxies for a complete list), on the order of 100,000 in the Local Supercluster, and an estimated 100 billion in all of the observable universe.
This NASA/ESA Hubble Space Telescope image shows a cluster of hundreds of galaxies located about 7.5 billion light-years from Earth. The brightest galaxy within this cluster named SDSS J1156+1911 and known as the Brightest Cluster Galaxy (BCG), is visible in the lower middle of the frame.
Astronomers using the Hubble Space Telescope assembled a comprehensive picture of the evolving universe – among the most colorful deep... The magnificent spiral arms of the nearby galaxy Messier 81 are highlighted in this image from NASA's Spitzer Space Telescope....
Galaxies consist of stars, planets, and vast clouds of gas and dust, all bound together by gravity. The largest contain trillions of stars and can be more than a million light-years across. The smallest can contain a few thousand stars and span just a few hundred light-years.
5 ημέρες πριν · Astronomers classify galaxies into three major categories: elliptical, spiral and irregular. These galaxies span a wide range of sizes, from dwarf galaxies containing as few as 100 million stars to giant galaxies with more than a trillion stars.
This image from the NASA/ESA/CSA James Webb Space Telescope of a massive galaxy cluster called WHL0137-08 contains the most strongly magnified galaxy known in the Universe’s first billion years: the Sunrise Arc, and within that galaxy, the most distant star ever detected.
Image Archive: Galaxies. Out of this whirl: The Whirlpool Galaxy (M51) and companion galaxy. A poster-size image of the beautiful barred spiral galaxy NGC 1300. A 'wallpaper' of distant galaxies is a stunning backdrop for a runaway galaxy. Hubble's newest camera takes a deep look at two merging galaxies. Largest ever galaxy portrait - stunning ...
