Sorry mccoy but you do not understand astrology. You are still a Leo unless of course you subscribe to Vedic astrology. In western astrology you are a Leo. You do not understand the tropical zodiac and it's meaning. It is solar based... not star based.
In western classical tropical astrology I'm still a leo, whereas in sidereal astrology I take it I would be a cancer according to both Fagan's and Berg's conventions.
So, the NASA site seems to be treating together tropical and sidereal astrology, mixing the classical apples and oranges. Someone should tell them.
The confusing fact is that sidereal astrology is today correlated to the classic tropical astrology. I take it it is because of lack of tools to draw a sidereal natal chart. But it is something which would apparently (just apparently because I do not know the transformations) legitimate the Concerns of the NASA site.