#regiomontanus

Regiomontanus (the system I use) is a system that was often used in Europe by horarists such as William Lilly, Lilly based his work strongly of Ptolemy. Lilly, and everyone who studied Lilly, worked with Regiomontanus.

However, these days, there is a lot of discussion. You have people who use regiomontanus, whole sign system, placidus, etc. It's the same as with natal astrology where there are debates about Koch, equal, placidus, etc. Still, Regiomontanus is used most commonly.

Regiomontanus (and tropical systems in general) is/are calculated by the right ascension, rather than the celestial longitude. While sidereal systems of astrology define the signs relative to the apparent backwards movement of fixed stars of about 1 degree every 72 years from the perspective of the Earth, tropical (including regiomontanus, placidus, Koch, etc.) systems define 0 degrees of Aries to coincide with the vernal point or vernal equinox (also known as the March equinox in the Northern hemisphere), and define the rest of the zodiac from this point. [1]

In simple terms, tropical systems calculate from 0° Aries which coincides with the March equinox and divide the rest of the zodiac from Aries. Sidereal is calculated in relation to the backwards movement of 1° every 72 years of the fixed stars.

I'm curious if a chart gives a completely different answer if you change the house systems, though :)

In birth order of their eponyms:

Purbach crater is named after Austrian astronomer Georg von Peuerbach (1423-1461) who aimed at making astronomy accessible for the average European during the Renaissance with his textbook, Theoricae Novae Planetarum.

Walther crater is named after the German merchant Bernhard Walther (1430-1504) who was a noted observer of the motions of the planets.

Regiomontanus crater is named after German mathematician Johannes Müller von Königsberg (1436-1476) who helped develop the heliocentric theory of the solar system with trigonometry.

Orontius crater is named after the French mathematician Oronce Finé (1494-1555) who published an astronomy textbook De mundi sphaera which guided readers on the use of equipment and proper astronomy methods.

Nonius crater is named for Pedro Nunes (1502-1578), a Portuguese mathematician who used trigonometry to make improvements to the geocentric model of the solar system.

Hell crater is not named after the land of Satan, but instead is named after Hungarian astronomer Maximilian Hell (1720-1792) who was the director of the Vienna Observatory and observed the 1769 transit of Venus.

Lexell crater is named after the Finnish astronomer Andres Johan Lexell (1740-1784), a prolific member of the Russian Academy of Sciences who made important discoveries in celestial mechanics. He was the first to prove that Uranus was a planet rather than a comet.

Miller crater is named after William Allen Miller (1817-1870), a British chemist who aided William Huggins in studying the spectra of astronomical objects, primarily stars.

Huggins crater is named after the British astronomer William Huggins (1824-1910) who pioneered the realm of astronomical spectroscopy, becoming the first to take the spectrum of a planetary nebula.

Bell crater is named after none other than Canadian inventor Alexander Graham Bell (1847-1922) most famous for inventing the telephone, but who also had inventions in aeronautics.

Deslandres crater is named for Henri Alexandre Deslandres (1853-1948), a French astronomer who was the director of the Paris Observatories and carried out studies on the atmosphere of the Sun.

I've decided to represent myself using my Rise of the TMNT OC, Regiomontanus (Gio). You may refer to me in-character, or simply as some form of my username (grizzlyofthesea). My pronouns are they/them and she/her.

An approximate layout of my favorite turtles. Honestly, though, everyone aside from Donnie is basically interchangeable. They're all great. (I've sort of "adopted" them as my fictional brothers, too. ^^")

Some of my favorite things:

My dogs (and dogs in general, but mine are the cutest)

Astronomy

Tea

The ocean

Pocket watches and other elements of 19th century men's fashion

Video games

Seafood, especially shrimp

Music

My top fandoms:

FNAF, represented by Mr. Fazbear himself

ROTTMNT, represented by a smol Donnie

Super Mario, represented by Princess Daisy

Monster High, represented by G1 Lagoona

Several magical girl anime/manga, represented by Sailor Mercury

Some of my biggest dislikes:

Tomatoes

Onions

Skirts and dresses (wearing them; they can still be cool to look at)

Loud and irritating noises

The cold

Stink bugs (are we sure they aren't actually demons?)

Some skills/talents:

Lifeguarding

Perfect pitch

Playing the piano

Physics (and, by extension, math)

Applicable pride flags:

Aroace

Nonbinary

Genderfluid

Genderfaer

Jellogender