Unit order for Astronomy

[Katie]

Perfect!

Thank you, Tanya!

[tanya]

Hello.

It would be fine to do the Astronomy study out of order. We actually have customers on the other side of the world who have to do that!

Regards,

Tanya

[Katie]

We have just started Astronomy today. I am wondering if the units are interchangeble? Would it be ok to start the winter unit now instead summer/fall? I've browsed through the TM and can't decide if this would throw us off.
Thanks!