Across 1951, the sky delivered 12 full moons and 5 eclipses. The eclipses fell: an annular solar eclipse in Pisces on March 7, a penumbral lunar eclipse in Libra on March 23, a penumbral lunar eclipse in Aquarius on August 16, an annular solar eclipse in Virgo on September 1, and a penumbral lunar eclipse in Pisces on September 15. Mercury turned retrograde three times (Apr 14 to May 8; Aug 17 to Sep 9; Dec 7 to Dec 27). The first full moon rose in Leo on January 22. Every full moon, new moon, solar and lunar eclipse, equinox, solstice, planetary ingress, and retrograde station below is computed to the millisecond with the NASA-cross-checked Swiss Ephemeris engine and shown in Eastern Time - Choose your location on the page for your own sky.
January 1951
- Last Quarter Moon in Libra
- New Moon in Capricorn
- Venus enters Aquarius
- Saturn Retrograde
- Mercury Direct
- First Quarter Moon in Aries
- Sun enters Aquarius
- Neptune Retrograde
- Juno enters Sagittarius
- Mars enters Pisces
- Full Moon in Leo
- Ceres enters Aquarius
- Last Quarter Moon in Scorpio
- Venus enters Pisces
February 1951
- New Moon in Aquarius
- Chiron enters Capricorn
- Mercury enters Aquarius
- First Quarter Moon in Taurus
- Sun enters Pisces
- Full Moon in Virgo
- Venus enters Aries
- Mercury enters Pisces
- Last Quarter Moon in Sagittarius
March 1951
- Mars enters Aries
- Saturn Rx enters Virgo
- Annular Solar Eclipse (New Moon) in Pisces
- Uranus Direct
- Pallas enters Aquarius
- First Quarter Moon in Gemini
- Mercury enters Aries
- Venus enters Taurus
- Sun enters Aries (Spring Equinox)
- Penumbral Lunar Eclipse (Full Moon) in Libra
- Juno Retrograde
- Last Quarter Moon in Capricorn
- Vesta enters Gemini
April 1951
- Mercury enters Taurus
- New Moon in Aries
- Mars enters Taurus
- Chiron Retrograde
- First Quarter Moon in Cancer
- Mercury Retrograde
- Venus enters Gemini
- Ceres enters Pisces
- Sun enters Taurus
- Jupiter enters Aries
- Full Moon in Scorpio
- Last Quarter Moon in Aquarius
- Pluto Direct
May 1951
- Mercury Rx enters Aries
- New Moon in Taurus
- Mercury Direct
- Venus enters Cancer
- First Quarter Moon in Leo
- Mercury enters Taurus
- Full Moon in Scorpio
- Mars enters Gemini
- Sun enters Gemini
- Last Quarter Moon in Pisces
- Saturn Direct
- Pallas Retrograde
June 1951
- Juno Rx enters Scorpio
- New Moon in Gemini
- Venus enters Leo
- Mercury enters Gemini
- Vesta enters Cancer
- First Quarter Moon in Virgo
- Chiron Rx enters Sagittarius
- Full Moon in Sagittarius
- Sun enters Cancer (Summer Solstice)
- Mercury enters Cancer
- Last Quarter Moon in Aries
- Neptune Direct
July 1951
- Mars enters Cancer
- New Moon in Cancer
- Venus enters Virgo
- Mercury enters Leo
- First Quarter Moon in Libra
- Ceres Retrograde
- Full Moon in Capricorn
- Juno Direct
- Sun enters Leo
- Last Quarter Moon in Taurus
- Mercury enters Virgo
August 1951
- New Moon in Leo
- Jupiter Retrograde
- First Quarter Moon in Scorpio
- Pallas Rx enters Capricorn
- Venus Retrograde
- Saturn enters Libra
- Penumbral Lunar Eclipse (Full Moon) in Aquarius
- Mercury Retrograde
- Mars enters Leo
- Vesta enters Leo
- Sun enters Virgo
- Last Quarter Moon in Gemini
- Chiron Direct
September 1951
- Annular Solar Eclipse (New Moon) in Virgo
- First Quarter Moon in Sagittarius
- Juno enters Sagittarius
- Mercury Direct
- Penumbral Lunar Eclipse (Full Moon) in Pisces
- Pallas Direct
- Last Quarter Moon in Gemini
- Sun enters Libra (Autumn Equinox)
- Venus Direct
- New Moon in Libra
October 1951
- Mercury enters Libra
- Mars enters Virgo
- First Quarter Moon in Capricorn
- Full Moon in Aries
- Mercury enters Scorpio
- Uranus Retrograde
- Last Quarter Moon in Cancer
- Ceres Direct
- Sun enters Scorpio
- New Moon in Scorpio
November 1951
- Vesta enters Virgo
- Pallas enters Aquarius
- First Quarter Moon in Aquarius
- Mercury enters Sagittarius
- Chiron enters Capricorn
- Venus enters Libra
- Full Moon in Taurus
- Last Quarter Moon in Leo
- Sun enters Sagittarius
- Pluto Retrograde
- Mars enters Libra
- New Moon in Sagittarius
- Jupiter Direct
December 1951
- Mercury enters Capricorn
- First Quarter Moon in Pisces
- Mercury Retrograde
- Venus enters Scorpio
- Mercury Rx enters Sagittarius
- Full Moon in Gemini
- Juno enters Capricorn
- Last Quarter Moon in Virgo
- Sun enters Capricorn (Winter Solstice)
- Mercury Direct
- New Moon in Capricorn