Image of the Day May 18, 2026
Earth’s night lights are changing unevenly
NASA Earth Observatory’s new view of artificial light at night shows that the planet is not simply getting brighter in a smooth line. Using Black Marble data from VIIRS instruments on Suomi-NPP, NOAA-20 and NOAA-21, researchers mapped where night-time light intensified and where it dimmed between 2014 and 2022. Gold areas mark brightening; purple areas mark dimming. The pattern reflects construction, industrial booms and busts, blackouts, policy-driven lighting changes and other human activity. It is a reminder that satellite images of Earth at night are not just beautiful: they are a proxy for energy use, urban change, conflict, recovery and the way modern life leaks into the dark.
Credit · NASA Earth Observatory
On This Day 57 years ago
1969
Apollo 10 launches for the Moon
On 18 May 1969, Apollo 10 lifted off from Kennedy Space Center on the final full rehearsal before the first Moon landing. NASA described the mission as a dress rehearsal: Thomas Stafford, John Young and Eugene Cernan took the command and lunar modules to lunar orbit, tested procedures, communications and rendezvous, and flew the lunar module Snoopy down to within about 15 kilometres of the Moon’s surface without landing. The mission mattered because Apollo 11 depended on more than courage and a rocket. It needed a validated operational stack: navigation, staging, crew choreography, ground control and abort paths. Apollo 10 turned the landing plan from theory into practised procedure.
Paper of the Day arXiv · cs.LG
RoadmapBench: Evaluating Long-Horizon Agentic Software Development Across Version Upgrades
Xinbo Xu, Ruihan Yang, Haiyang Shen, Wendong Xu, Bofei Gao, Ruoyu Wu, Kean Shi, Weichu Xie, Xuanzhong Chen, Ming Wu, Jason Zeng, Michael Heinrich, Elvis Zhang, Liang Chen, Kuan Li, Baobao Chang
Most coding-agent benchmarks still look like small bug-fix tasks: one issue, one repository, pass or fail. RoadmapBench asks a more useful question for real software teams: can an agent handle longer-horizon work across version upgrades, where changes span many files and require coordinated progress rather than a single patch? The authors introduce 115 tasks grounded in 15 real-world repositories, with evaluation aimed at multi-target development rather than only unit-test success. For anyone using agents in production codebases, the paper is a reminder that the frontier is not just writing correct snippets. It is planning, sequencing, preserving architecture and surviving the messy middle of an upgrade.
arXiv:2605.15846 →