星系NGC 5394和NGC 5395的双人慢舞
2020 March 4 The Slow Dance of Galaxies NGC 5394 and 5395 Image Credit: Gemini, NSF, OIR Lab, AURA; Text: Ryan Tanner (NASA/USRA) Explanation: If you like slow dances, then this may be one for you. A single turn in this dance takes several hundred million years. Two galaxies, NGC 5394 and NGC 5395, slowly whirl about each other in a gravitational interaction...