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Is the nearest star cluster to the sun being destroyed? 5nvklj





Is the nearest star cluster to the sun being destroyed? 9tpt39

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Is the nearest star cluster to the sun being destroyed?

Dragon
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Is the nearest star cluster to the sun being destroyed? Empty Is the nearest star cluster to the sun being destroyed?

Post by Dragon Fri Mar 26, 2021 8:50 pm

[Data from ESA's Gaia star mapping satellite have revealed tantalizing evidence that the nearest star cluster to the sun is being disrupted by the gravitational influence of a massive but unseen structure in our galaxy.

If true, this might provide evidence for a suspected population of 'dark matter sub-halos."

These invisible clouds of particles are thought to be relics from the formation of the Milky Way, and are now spread across the galaxy, making up an invisible substructure that exerts a noticeable gravitational influence on anything that drifts too close.


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Last edited by Dragon on Fri Mar 26, 2021 8:58 pm; edited 1 time in total


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Is the nearest star cluster to the sun being destroyed? 334pu7m
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Post by Dragon Fri Mar 26, 2021 8:52 pm

Is the nearest star cluster to the sun being destroyed? Isthenearest
Credit: ESA/Gaia/DPAC

The Hyades star cluster is gradually merging with the background of stars in the Milky Way. The cluster is located 153 light years away and is visible to the unaided eye because the brightest members form a ‘V’-shape of stars in the constellation of Taurus, the Bull.

This image shows members of the Hyades as identified in the Gaia data. Those stars are marked in pink, and the shapes of the various constellations are traced in green.

Stars from the Hyades can be seen stretching out from the central cluster to form two ‘tails’.

These tails are known as tidal tails and it is through these that stars leave the cluster. The image was created using Gaia Sky.


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Is the nearest star cluster to the sun being destroyed? 334pu7m
Dragon
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Post by Dragon Fri Mar 26, 2021 8:53 pm

Is the nearest star cluster to the sun being destroyed? 1-isthenearest
Credit: ESA/Gaia/DPAC

The true extent of the Hyades tidal tails have been revealed for the first time by data from the ESA’s Gaia mission.

The Gaia data has allowed the former members of the star cluster (shown in pink) to be traced across the whole sky.

Those stars are marked in pink, and the shapes of the various constellations are traced in green. The image was created using Gaia Sky


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Is the nearest star cluster to the sun being destroyed? 334pu7m
Dragon
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Post by Dragon Fri Mar 26, 2021 8:55 pm



Locating the Hyades tidal tails

The Hyades is an easily recognisable star cluster in the night sky.

The brightest handful of stars define the face of Taurus, the Bull. Telescopes show that the central cluster itself contains many hundreds of fainter stars in a spherical region roughly 60 light years across.

Previous studies have shown that stars were ‘leaking’ out of the cluster to form two tails that stretch into space.

Gaia has now allowed astronomers to discover the true extent of those tails by tracing former members of the Hyades across the whole sky.


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Is the nearest star cluster to the sun being destroyed? 334pu7m
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Post by Dragon Fri Mar 26, 2021 8:56 pm



In about 4 billion years (give or take), the huge Andromeda galaxy will collide with the Milky Way.

Our best estimates show the two will pass each other, then fall back together, merging into one larger galaxy.


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