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| RX | Rxvt | Rx Bandits |
| RX-78GP02A Gundam Physallis | RX-78 mobile suit series | RXN |
| RXJ1856RX J1856 (aka RXJ185635-375 is a compact star that is suspected of being made of quark matter. It is theorized that the interior of the star is a gigantic atomic nucleus due to the fact that it appears much smaller than expected for a neutron star. This w |