APOD: 2024-09-27 - Stellar Streams in the Local Universe (Narrated by Brian)

Astronomy Picture of the Day - September 27th, 2024 - Stellar Streams in the Local Universe (Narrated by Brian)

The twenty galaxies arrayed in these panels are part of an ambitious astronomical survey of tidal stellar streams. Each panel presents a composite view; a deep, inverted image taken from publicly available imaging surveys of a field that surrounds a nearby massive galaxy image. The inverted images reveal faint cosmic structures, star streams hundreds of thousands of light-years across, that result from the gravitational disruption and eventual merger of satellite galaxies in the local universe. Such surveys of mergers and gravitational tidal interactions between massive galaxies and their dwarf satellites are crucial guides for current models of galaxy formation and cosmology. Of course, the detection of stellar streams in the neighboring Andromeda Galaxy and our own Milky Way also offers spectacular evidence for ongoing satellite galaxy disruption within our more local galaxy group.

Source: https://apod.nasa.gov/apod/ap240927.html

This video was auto generated using data from NASA Open API.

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