This was the speedy Paul Stuart-trained dark brindle�s seventh win on the trot.
Astrophysic�s career record is a phenomenal 21 wins from 25 starts.
Astrophysic saw off an early challenge from Feels Like Eel and grabbed the lead before they hit the turn.
He then stormed away to put the issue beyond doubt.
Astrophysic crossed the line nearly four lengths ahead of Waiter�s Eye in a slick 22.44.
In other racing, Brintastic snapped an eight-race losing sequence to score at big odds in the Get Group Going Grade 3 over 405m.
The red fawn bitch out of Karl Jovanovic�s kennels overcame box eight to tough out a hard-fought victory.
After landing midfield, she pressed forward but was forced three wide throughout the trip.
She still had enough in her legs to power to the front in the final few strides and snatch the win in 23.07.