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US National Aeronautics and Space Administration — flagship missions, planetary science, and Hubble/Webb imagery.

European Space Agency — Copernicus Earth observation, Gaia star survey, and ExoMars mission.

Japan Aerospace Exploration Agency — Hayabusa asteroid sample return and H3 launch vehicle.

Indian Space Research Organisation — Chandrayaan lunar programme and Aditya-L1 solar observatory.

China National Space Administration — Chang'e lunar missions and Tianwen Mars exploration.

National Astronomical Observatories of China — operator of FAST and LAMOST telescopes.

World's largest single-dish radio telescope at 500 m aperture, located in Guizhou, China.

Large Sky Area Multi-Object Fiber Spectroscopic Telescope — 4,000-fiber spectral survey in Xinglong, China.

China's oldest modern observatory (est. 1934) — asteroid naming authority and NEO monitoring centre.

8.2 m optical-infrared telescope atop Mauna Kea, operated by Japan's NAOJ — Hyper Suprime-Cam wide-field surveys.

European Southern Observatory's Very Large Telescope in Chile — four 8.2 m mirrors, adaptive optics, ESPRESSO spectrograph.

Twin 8.1 m telescopes (Hawaii & Chile) providing full-sky optical/IR access for the international community.

NOAA's Space Weather Prediction Center — authoritative source of Kp index, flare alerts, and geomagnetic storm forecasts.

ESA's Space Situational Awareness programme — European space weather forecasting and spacecraft anomaly monitoring.

Solar Dynamics Observatory — real-time solar imagery in 10 wavelengths and SolarSoftware data archive.

Solar and Heliospheric Observatory — joint ESA/NASA mission monitoring solar wind and CMEs since 1995.

Global Oscillation Network Group — 6-station helioseismology network providing 24/7 solar surface magnetograms.

International Dark-Sky Association — certifies dark-sky parks and advocates against light pollution globally.

Interactive global map of artificial sky brightness — plan observation sites using Bortle scale data.

Astronomy-focused cloud and transparency forecast — shows seeing, humidity, and wind at any location.