Please read the "Sticky" at near the top of the column for this subforum that is titled "Understanding the Enumeration of the Degrees" for a full explanation and hopefully a resultant understanding.
Or, if you'd rather have a personal explanation, then read on.
To put it in a nutshell [but, please, do read the "sticky" anyways]
29* and change IS THE 30th degree. 29* 00' 00" is the 29th degree but only for the very instant it occurs, the universe is not a static model, as you must surely know, it is ever active and ephemeral.
For instance, Pluto will come up at some point in time as being at 29* 00' 00" and it will remain at that reading according to astrodienst's computer ephemeris for quite a number of many minutes...yet it was only truly at exactly that coordinate for the briefest moment. I accredit such a coordinate to only the very first second after a given location was 28* 59' 59", the next second after it first reads 29* 00' 00" it has gone beyond that mark...infinitesimally so by an astronomers estimation yet Pluto moves in its orbit around the Sun at an estimated 10,623 mph. That's just shy of 3 miles per second.
There's no such thing as 00* 00' 00" degrees of any Sign. That is only correctly identified as being [as that is what it is] 30* 00' 00". But that only exists for the briefest of an instant, in less time than it takes to blink an eye.
Yet, I do consider the very first instant after the reading of 29* 59' 59" by astrodienst's calculations to be 30* 00' 00" as for the reason that my astrological concerns are oriented toward the Spiritual destiny of mankind, first and foremost. It may assist you in understanding what I mean by that by my offering the following statement; "If God has a reason for someone to be born at exactly XX* 00' 00" of any degree of the Zodiac then I haven't the least of any doubt that God has a very good reason that it did, or that it will someday, occur". For that reason alone is all the explanation I have to offer as to why I make such a consideration.
The beginning of any degree begins at XX* 00' 01" [but in the most accurate of possible coordinates it is at XX* 00' 00.00000...01"]
Let me give you an example derived from astronomical facts and data to provide you with, hopefully, a broader understanding or at least a clearer perspective.
As I stated earlier, NASA claims that Pluto travels at apprx. 10,623 mph in its orbit around the Sun. ..and by my use of the word approximate, I'm rather sure that it isn't exactly that measure of speed but almost undoubtedly so many feet more or less than a full mile per hour more or less than 10,623 miles traveled per hour.
On April 2nd of this year, 2018, by Philadelphia, Pennsylvania, U.S.A. time, at 12:01:04 A.M.by astrodiensts calculations Pluto was at 21* Capricorn 10' 59",. At 12:01:05 A.M Pluto was at 21* Capricorn 11' 00".
According to astrodienst at 12:40:34 A.M., Philadelphia, Pennsylvania time Pluto was still at 21* Capricorn 11' 00" and according to astrodienst at 12:40:35 A.M. Pluto was at 21* Capricorn 11' 01"
Thus, according to astronomical measure, Pluto was at the exact same coordinate as to the nearest second of a degree for 39 minutes and 29 seconds in time. Yet at the speed that Pluto travels, it moved a distance of [apprx.] 6990.524 miles in that span of time.
Thus it can be easily deduced that at the distance Pluto was from the Earth during that span of time one second of one degree is equal to 6990,524 miles of space and that kind of puts into perspective what astrodienst did in 2012 [I think it was, I've forgotten exactly but have all the evidence filed away if anyone really cares so much as to want to see it] when it arbitrarily moved Pluto a distance of 00* 01' 59" forward from the original coordinates they gave me, eight years earlier, [on November 7, 2004] for April 2, 003 A.D. at 5:23 P.M.[as they moved Pluto from 00* Libra 58' 52 to 01* Libra 00' 51".] which then calculates to be at least [apprx.] 831.872.35 or as many as [apprx.] 838,859.92 miles of difference.
As the original position is that as calculated by JPL, the same computer program that NASA used to guide all its spaceflights well into the 1990's {although it may have been well into the 2000's. I can't recall exactly] I'm rather surprised that NASA was able to come near enough to any targeted objective as to declare that mission to be a success ...and that satellite they sent to Pluto so recently as to be able to photograph it so well as they had predicted beforehand certainly must have been the most luckiest shot of all "Lucky Shots" of all time.
Such luck that It just boggles my mind
But I have digressed here and into one of my PET PEEVES, [I'm so embarassed
] so if you will forgive me, let me just try to sum this all up by saying that I hope that I have given you some clarification as to how the degrees are enumerated when stated in proper astronomical terms.
If we want astrology to be recognized as the "Science" it truly is
[or, I should say, 'once rectified it will as so undeniably be'?] we must conduct ourselves as just like scientists and giving the proper respect to the terminology is a must.
00* 00' 01' to 00* 59' 59" is in the 1st degree [so is 01* 00' 00", but you likely will never see it ever used and certainly not on any chart issued by astrodienst] 01* 00' 01 to 01* 59' to 59" is in the 2nd degree.
29* 00' 01" to 29* 59' 59" is the 30th degree and it is the anaretic degree
[and if by some oddest of circumstance or coincidence you see the coordinate 30* 00' 00" that too is also of the 30th degree and is also part of the anaretic degree]
...and least not forget that the solar system and the galaxy it is a part of are also moving at great speed and that the Tropical Zodiac is ever sliding retrograde at an apprx. speed of 1 degree every 71.5 years...so there is that to take into consideration also and, when done so, that all but renders the notion of anything in space possibly being truly static at any coordinate given in Zodiacal degrees to be about as ridiculous an assumption as anyone might possibly make.... but I'm no astrophysicist, so what do I know?