https://arstechnica.com/?p=2028713 North Korea has recently been testing missiles. They attempted a failed launch of their Chollima-1 rocket on May 27 but they’re doing something unexpected now
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More-than-expected rocket tests at the Sohae launch centre
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A Russian delegation is present too. This hints to a possible defence collaboration between North Korea and Russia
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They announced that they are using kerosene and liquid oxygen as rocket fuel. Earlier, they used a combination of hydrazine and dinitrogen tetroxide, which are Hypergolic Propellants
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SpaceX Falcon 9 rocket burn anomaly fixed, and SpaceX says Falcon 9 is ready for launch in less than two weeks since the failure happened
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Rolls Royce is developing a nuclear micro-reactor for space lunar missions. It has received a grant of $6.2 million from the UK Space Agency. It will take 18 months for the development and first orbital tests will happen in a decade
- Data from NICER, XMM-Newton, and Chandra of seven thermally isolated neutron stars (XINS) showed one star having an erratic spin → Erratic spin means that the surface heat distribution is complex. This is associated with a strong magnetic field. Understanding XINS will give us more information about neutron stars and their working