A starfield is shown that has two short streaks running diagonally. At closer inspection, they are two comets both with white-green heads and white tails. Please see the explanation for more detailed information.
星空呈现出两条斜向的短条纹。仔细观察，会发现它们是两颗彗星，彗核和彗尾均为白绿色。有关更多详细信息，请参阅说明。
2020 April 29 The Ion Tail of New Comet SWAN Image Credit & Copyright: Gerald Rhemann Explanation: Newly discovered Comet SWAN has already developed an impressive tail. The comet came in from the outer Solar System and has just passed inside the orbit of the Earth. Officially designated C/2020
