Pluto Revisited, Mars Thrusters Tested, and Pirates Emerge Again
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NASA is preparing scientific papers that could restore Pluto's status as a full planet, potentially reversing the controversial 2006 International Astronomical Union decision that reclassified it as a dwarf planet. The reconsideration is driven by data from the New Horizons mission and subsequent observations showing Pluto's geological activity and complex atmospheric dynamics are more planet-like than scientists understood nearly two decades ago. Because NASA does not unilaterally set planetary classifications, the papers would mark the opening of a broader deliberative process within the international scientific community rather than a settled outcome.
In propulsion research, NASA announced that a magnetoplasmadynamic thruster reached 120 kilowatts during February testing at the Jet Propulsion Laboratory — more than 25 times the power of the agency's current electric propulsion systems. The jump is exponential rather than incremental, and engineers say it could enable faster Mars transit times, directly reducing crew radiation exposure on future human missions. Separately, the Orion crew module for Artemis II returned to Kennedy Space Center on Tuesday while assembly began on the Artemis III rocket, a dual milestone NASA says reflects the aggressive cadence it intends to maintain in its lunar program.
Blue Origin completed its first preflight test of its lunar lander in Florida, adding a competitive option to NASA's Artemis contractor pool and reducing single points of failure in the program. California's Coastal Commission reached a settlement with SpaceX that included an apology to the company, resolving a regulatory dispute that had hampered SpaceX operations along the California coast.
On Earth's oceans, Cambridge-led research provided what scientists described as the first observational proof that warm circumpolar deep water has migrated toward Antarctic ice shelves over two decades. The finding, which demonstrates a measurable shift in deep-ocean heat toward Antarctica, carries implications for sea-level rise projections and climate models that had not previously accounted for this pattern of ocean current migration.