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MY'STORY

The MOVE Fire

This is a personal recollection on the Move fire on May 13, 1985 Philadelphia police fired thousands of rounds at the MOVE house, city officials approved dropping an explosive device on the roof, the resulting fire was allowed to burn, 11 people—including five children—died, and 61 homes were destroyed. Philadelphia City Council later called it a “brutal attack carried out by the City of Philadelphia on its own citizens” and acknowledged that no individual faced criminal consequences for the bombing. One timeline correction worth preserving for the BHP record: the major previous MOVE-police confrontation was August 8, 1978, about seven years before the bombing, not a year or two earlier. Officer James Ramp was killed, other police and firefighters were wounded, nine MOVE members were later convicted, and television cameras recorded police beating Delbert Africa during his arrest. The 1985 MOVE Commission later specifically criticized city planners for failing to adequately use lessons from that 1978 confrontation. And that actually strengthens the point you’re making: 1985 did not happen without precedent or institutional memory. There had already been a deadly confrontation with MOVE, years of conflict, negotiations and police involvement before Osage Avenue.

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Shirley Chisholm — Unbought and Unbossed

In 1968 Shirley Chisholm became the first Black woman elected to the United States Congress. In 1972 she launched a campaign for the Democratic presidential nomination, breaking another political barrier.

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Wikipedia

Ophiuchus Supercluster

Ophiuchus Supercluster
The local universe, including the Ophiuchus Supercluster as shown above
Observation data (Epoch J2000)
ConstellationOphiuchus
Right ascension13h 25m 00s[1][2]
Declination−30° 00′ 00″[2][1]
Parent structureLaniakea Supercluster[3]
Major axis303 Mly (92.8 Mpc)[4]: 14 [a]
Redshiftz = 0.028
Distance455 ± 32.0 Mly (139.6 ± 9.8 Mpc) h−1
67.80 ± 0.077 (Ophiuchus Cluster)[5]
Other designations
Ophiuchus Supercluster[1], Oph Supercl[1], Ophiuchus BoA[4]

The Ophiuchus Supercluster is a nearby galaxy supercluster in the constellation Ophiuchus.[6][7] The supercluster forms the far wall of the Ophiuchus Void; it may also be connected in a filament with the Pavo-Indus-Telescopium and the Hercules Superclusters.[7][8] This supercluster is centered on the cD cluster (Abell class type I) Ophiuchus Cluster, and has at least two more galaxy clusters, four more galaxy groups, and several field galaxies as members.[citation needed]

Significance

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In 2014, it was identified that the Ophiuchus Cluster, alongside its surroundings, is part of a greater supercluster, Laniakea—a basin of attraction centered on the Great Attractor, in which the Virgo Supercluster is also now considered a lobe of.[3][b] A subsequent study based on observations of basins of attraction suggested a basin of attraction around Ophiuchus Cluster may be associated with Laniakea, and also have found both are moving toward the Shapley Concentration.[4] They have hence been suggested to be likely part of this even larger structure.[4]

In February 2020, astronomers reported that a 1.5 million light-year wide cavity in the Ophiuchus Supercluster originated from the central galaxy of the Ophiuchus Cluster. The cD galaxy, NeVe 1, is the site of the Ophiuchus Supercluster eruption, triggered by the ejection of ~270 million solar masses (M☉) from the supermassive black hole of NeVe 1, called WISEA J171227.81-232210.7. This may be the largest known explosion in the observable universe since the Big Bang.[9][10][11][12]

Discovery

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Ken-ichi Wakamatsu of Gifu University and Matthew Malkan discovered Ophiuchus Cluster in 1981 on Palomar Schmidt IV-N Plates during a hidden globular cluster survey.[6] Perhaps, determining characteristics of a supercluster will help to more correctly explain the excess velocity component of the local group of galaxies.[7]

Notes

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  1. ^ The calculated volume in Valade et al. (2024) is 0.80×106 Mpc per cube.
  2. ^ Although not directly stated in Tully et al. (2014), the said paper mentioned "an extension to the Ophiuchus Cluster"

References

[edit]
  1. ^ a b c d "Ophiuchus Supercluster". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-12-12.
  2. ^ a b Colin, Jacques; Mohayaee, Roya; Rameez, Mohamed; Sarkar, Subir (2017). "High-redshift radio galaxies and divergence from the CMB dipole". Monthly Notices of the Royal Astronomical Society. 471 (1): 1045. arXiv:1703.09376. Bibcode:2017MNRAS.471.1045C. doi:10.1093/mnras/stx1631.
  3. ^ a b R. Brent Tully; Helene Courtois; Yehuda Hoffman; Daniel Pomarède (2 September 2014). "The Laniakea supercluster of galaxies". Nature. 513 (7516) (published 4 September 2014): 71–3. arXiv:1409.0880. Bibcode:2014Natur.513...71T. doi:10.1038/nature13674. PMID 25186900. S2CID 205240232.
  4. ^ a b c d Valade, A.; Libeskind, N. I.; Pomarède, D.; Tully, R. B.; Hoffman, Y.; Pfeifer, S.; Kourkchi, E. (2024). "Identification of basins of attraction in the local Universe". Nature Astronomy. 8 (12): 1610. arXiv:2409.17261. Bibcode:2024NatAs...8.1610V. doi:10.1038/s41550-024-02370-0.
  5. ^ Ophiuchus Cluster on NASA/IPAC Extragalactic Database
  6. ^ a b Wakamatsu, Ken-ichi (January 2000). "The Ophiuchus Supercluster Observed with FLAIR". Retrieved 18 April 2019.
  7. ^ a b c Okamura, Sadanori; Karoji, Hiroshi; Jugaku, Jun; Parker, Quentin A.; Menzies, John W.; Sekiguchi, Kazuhiro; Malkan, Matthew; Wakamatsu, Ken-ichi; Hasegawa, Takashi (1 August 2000). "Large-scale structure of galaxies in the Ophiuchus region". Monthly Notices of the Royal Astronomical Society. 316 (2): 326–344. Bibcode:2000MNRAS.316..326H. doi:10.1046/j.1365-8711.2000.03531.x.
  8. ^ Mysteries of the Milky Way. The Rosen Publishing Group. 2008. p. 129. ISBN 978-1-4042-1404-0.
  9. ^ Giacintucci, S.; Markevitch, M.; Johnston-Hollitt, M.; Wik, D. R.; Wang, Q. H. S.; Clarke, T. E. (2020-02-27). "Discovery of a giant radio fossil in the Ophiuchus galaxy cluster". The Astrophysical Journal. 891 (1): 1. arXiv:2002.01291. Bibcode:2020ApJ...891....1G. doi:10.3847/1538-4357/ab6a9d. ISSN 1538-4357. S2CID 211020555.
  10. ^ Overbye, Dennis (6 March 2020). "This Black Hole Blew a Hole in the Cosmos – The galaxy cluster Ophiuchus was doing just fine until WISEA J171227.81-232210.7 – a black hole several billion times as massive as our sun – burped on it". The New York Times. Retrieved 6 March 2020.
  11. ^ "Biggest cosmic explosion ever detected left huge dent in space". The Guardian. 27 February 2020. Retrieved 6 March 2020.
  12. ^ "Astronomers detect biggest explosion in the history of the Universe". Science Daily. 27 February 2020. Retrieved 6 March 2020.

Further reading

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Wikipedia

Ophiuchus Supercluster

The Ophiuchus Supercluster is a nearby galaxy supercluster in the constellation Ophiuchus. The supercluster forms the far wall of the Ophiuchus Void; it may also be connected in a filament with the Pavo-Indus-Telescopium and the Hercules Superclusters. This supercluster is centered on the cD cluster (Abell class type I) Ophiuchus Cluster, and has at least two more galaxy clusters, four more galaxy groups, and several field galaxies as members.

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Wikipedia

Ophiuchus (disambiguation)

Ophiuchus is a constellation. Ophiuchus may also refer to: Ophiuchus Supercluster, a supercluster of galaxies Ophiuchus (astrology), sometimes used in sidereal astrology as a thirteenth constellation Ophiuchus (band), a folk roots rock group from Castle Combe, Wiltshire, England Ophiuchus Shaina, a manga character

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Wikipedia

MS 0735.6+7421

MS 0735.6+7421 is a galaxy cluster located in the constellation Camelopardalis, approximately 2.6 billion light-years away. It is notable as the location of one of the largest central galactic black holes in the known universe, which has also apparently produced one of the most powerful active galactic nucleus eruptions discovered. In February 2020, it was reported that another similar but much more energetic AGN outburst—the Ophiuchus Supercluster eruption in the NeVe 1 galaxy, was five times the energy of MS 0735.6+7421.

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Wikipedia

NeVe 1

NeVe 1 is a supergiant elliptical galaxy, which is the central, dominant member and brightest cluster galaxy (BCG) of the Ophiuchus Cluster. It lies at a distance of about 411 million light-years away from Earth and is located behind the Zone of Avoidance region in the sky. It is the host galaxy of the Ophiuchus Supercluster eruption, the most energetic astronomical event known.

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TOPIC OF THE DAY

Greenwood / Black Wall Street

Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.

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TRIVIA QUESTION OF THE DAY

Which Supreme Court case ruled state-sponsored public-school segregation unconstitutional?

Brown v. Board of Education in 1954.