About 12 billion years ago, a dwarf galaxy known as LKH collided with a young Milky Way and merged with it. This artist’s concept portrays that collision. NASA’s Hubble Space Telescope uncovered definitive evidence of this collision by studying globular star clusters. Illustration: NASA, ESA, Joseph Olmsted (STScI) Our home galaxy, the Milky Way, grew
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In this July 6, 2026 image, the Mid-Infrared Instrument (MIRI) on NASA’s James Webb Space Telescope reveals the nearby galaxy Centauri A, exposing the dusty structures and hidden activity that shape this unusual system. Centaurus A is 11 million light years from Earth, relatively close in cosmic terms. However, unlike most nearby galaxies, it is
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Since their discovery by NASA’s James Webb Space Telescope in 2022, small red dots (LRDs) have been the subject of great interest to astronomers. Understanding the nature of these compact and extremely distant red sources has been a perplexing scientific endeavor. One popular theory is that the small red dots are supermassive black holes known
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NASA’s Neil Gehrels Swift Observatory captured an “orphan” black hole lighting up as it devoured a star on the outskirts of a distant galaxy. For starters, these phenomena are rare and none have ever been seen so far outside the core of a galaxy before. “We were looking for these star destruction events as a
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A new study using data from NASA’s Hubble Space Telescope finds that star formation in the nearby Andromeda galaxy has seen a 500-million-year decline, with an even steeper decline over the past 40 million years. Andromeda, a spiral galaxy comparable in size to our Milky Way, is close enough to be seen with the naked
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The subject of this NASA/ESA Hubble Space Telescope image is a spiral galaxy battling titanic forces appearing on galactic scales in space. This is NGC 4654, an intermediate spiral galaxy in the constellation Virgo (the Maiden). It is classified as “intermediate” because its overall shape falls between spiral galaxies that have a bar in their
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