@apod: thank you :)

RE: RE: Astronomy Picture of the Day - 2018 January 02 - Unexpected X-Rays from Perseus Galaxy Cluster

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RE: Astronomy Picture of the Day - 2018 January 02 - Unexpected X-Rays from Perseus Galaxy Cluster

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2018-01-02 19:27

thank you :)

2018-01-02 19:27

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