RX J and 3C58: Cosmic X-rays May Reveal New Form of Matter ESTADÃO / ASSOCIATED PRESS Quarta-feira, 10 de abril de h22 RX.

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RX J1856.5-3754 and 3C58: Cosmic X-rays May Reveal New Form of Matter ESTADÃO / ASSOCIATED PRESS Quarta-feira, 10 de abril de 2002 - 15h22 RX J1856.5-3754 and 3C58: Cosmic X-rays May Reveal New Form of Matter Chandra observations of RX J1856.5-3754 and the pulsar in 3C58 suggest that the matter in these collapsed stars is even denser than nuclear matter, the most dense matter found on Earth. This raises the possibility that these stars are composed of free quarks or crystals of sub-nuclear particles, rather than neutrons. .... One exciting possibility, predicted by some theories, is that the neutrons in the star have dissolved at very high density into a soup of "up," "down" and "strange"quarks to form a "strange quark star" which would explain the smaller radius.