If I follow your logic, we should only create things that happen on Earth? Luckily not, we would be a little bored... ^^'
But ok, Corona is for REALISTIC THING on EARTH. That's all. It's the Judge Dredd realistic LAW and no one can break it ! :D
More seriously, I find that a bit unfortunate to block this function, as if they were telling you "EARTH ONLY WITH CORONA, no divagation! Its a serious render ! We are not on Jupiter or Alpha Centauri!" :D
Sad they don't like to travel into the galaxy :p
I am sure I did not say that :P
But be it as it may, what you want also happens on an unharmed Earth, twice a year, on locations along the equator on the days of the equinoxes. No need for space travel, the Sun expression can do that ;)
Still, I'd use one of the above mentioned workarounds if I needed the sun to pass exactly through zenith and nadir. Or I'd put together a little Xpresso setup, if I needed it more than once.
Engage!
Michael "Picard"