April 21 2024 Comet. 12p made its closest approach to the sun since 1953 on april 21 this year when it slingshotted around our home star and began heading back out toward the outer solar system. On the evening of april 21 the geometric brightness of the comet will be at its greatest, but the moon will be 96% illuminated and the comet will be only 2.7 degrees above.
In that phase, known as perihelion, the sun’s. The new york times has offered this calendar to readers since 2017.
