Hebrew alphabet is represented in the Kabbalah Tree of Life, which also represents the Astrology Signs and Planets.
the sephirot themselves are represented by the planets:
Kether (crown) – Uranus
Chokmah (wisdom) – Neptune
Binah (understanding) – Saturn
Chesed (mercy) – Jupiter
Geburah (strength, courage) – Mars
Tipharet (beauty) – Sun
Netzach (victory, eternity) – Venus
Hod (splendor) – Mercury
Yesod (the foundation) – Moon
Malkuth (the kingdom) – Earth
and the paths between the sephirot, that are connected to the signs:
Netzach-Malkuth is ק and Pisces (dagim דגים)
Netzach- Yesod is צ and Aries (tale טלה)
Hod-Tipharet is ע and Capricorn (gedi גדי)
Geburah-Chesed is ט and Leo (arie אריה)
Binah-Tipharet is ז and Gemini (te’omim תאומים)
Chokmah-Tipharet is ה and Aquarius (deli דלי)
Tipharet-Chesed is י and Virgo (betula בתולה)
Tipharet-Netzach is נ ans Scorpio (akrav עקרב)
Chokmah-Chesed is ו and Taurus (shor שור)
Binah-Geburah is ח and Cancer (sartan סרטן)
Tipharet-Geburah is ל and Libra (mozna’im מאזנים)
Also, the Sephirot are related to the different Signs qualities: Mutable, Fixed and Cardinal.
Netzach (Victory & eternity) is for fixed signs: Taurus, Aquarius, Scorpio and Leo. Its planet is Venus.
Hod (highness), Yesod (element) & Malchut (kingship) are for mutable signs: Gemini, Virgo, Sagittarius and Pisces.