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NASA Exoplanet Archive

Cool Companions on Ultrawide Orbits

CoRoT

Anna's Archive

ChemSpider

Library Genesis

Phys.org

ResearchGate

Wolfram Demonstrations Project

ArXiv

Active Asteroids (citizen science project)

Asteroid Zoo

Science information on Wikipedia

ChemRxiv

Sci-Hub

Zooniverse

Scholarpedia

Disk Detective

The Daily Minor Planet

Exomoon

ELODIE spectrograph

ESPRESSO

HATNet Project