He should know better.
https://www.msn.com/en-us/news/technology/interstellar-comet-3i-atlas-has-tail-facing-the-wrong-way/ar-AA1LETgm?ocid=winp2fptaskbarhover&cvid=ffed7afc29ce4086950d8eb848df5cc3&ei=38
A comet's tail always points away from the sun, NOT opposite the direction of motion. Its like the flag on a ship.