Spencer's guest on Sunday Lunch this week is Astrophysics Professor Jonti Horner, who sits down to chat space, life and everything in between. 

<p>Spencer's guest on Sunday Lunch this week is Astrophysics Professor Jonti Horner, who sits down to chat space, life and everything in between.&nbsp;</p>

Join Luke Grant on Saturdays and Sundays from 9am for all the latest local news.

<p>Join Luke Grant on Saturdays and Sundays from 9am for all the latest local news.</p>