Erika さんのイラストまとめ

Between the stars Alnitak, Saif, and Rigel, floats a vast, thick cloud of interstellar dust and gas. This is the Orion Nebula. Spanning 24 light-years, it's so close and large that it's visible to the naked eye. 1/

5/ Social stars: This animation illustrates the sky-projected motions of binary stars whose orbits have been determined by Gaia. Each ellipse corresponds to one of 335 systems located within 50 pc (163 light years) and with periods shorter than 1000 days.