Apex domains cannot have CNAME records.
Question and response
Question
dig aeterranova.org. NS
Answer
aeterranova.org. 5 NS ns-1000.awsdns-61.net.
aeterranova.org. 5 NS ns-1477.awsdns-56.org.
aeterranova.org. 5 NS ns-1237.awsdns-26.org.
aeterranova.org. 5 NS ns-1674.awsdns-17.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0