The Echo Horizon In 2103, the Solar Gravitational Lens Mission deployed its final coronagraphic array at 550 AU from the Sun. A fleet of twelve lightweight spacecraft, each carrying a 2-meter annular occulter and a diffraction-limited 50-cm telescope, had been shepherded…

The Paleochronograph In 2098, the International Chronometric Baseline achieved operational coherence across the inner solar system. Forty-eight strontium optical lattice clocks—sixteen on Earth, twelve in lunar orbit, eight at Mars L1, six on Ceres, and six distributed along near-Sun solar-sail orbits—were…

The Neutrino Veil In 2094, the Antarctic Muon and Neutrino Detector Array—AMANDA-II—completed its final upgrade. One hundred forty-four strings of digital optical modules plunged two kilometers into the clear glacial ice at the South Pole, forming a cubic-kilometer instrument sensitive to…