We offer you the March 2021 astronomy calendar. Astronomy is the foundation upon which astrology can operate. Actually, astrology and astronomy were treated together, under the Latin name of astrologia, being separated only by the Western 17th century philosophy. For sure: a good astrologer needs to study astronomy.

Saturday, March 6th: Mercury at Greatest Western Elongation

In astronomy, a planet’s elongation is the angular separation between the Sun and the planet, with Earth as the reference point. The planet Mercury reaches greatest western elongation of 27.3 degrees from the Sun. November 10th is the best time to view Mercury since it will be at its highest point above the horizon in the morning sky. Look for the planet low in the eastern sky just before sunrise.

march 2021 astronomy calendar

March 13th(Saturday): New Moon

The New Moon is when the Sun and Moon are aligned, with the Sun and Earth on opposite sides of the Moon. The new moon is the first lunar phase, when the Moon and Sun have the same ecliptic longitude. At this phase, the lunar disk is not visible to the unaided eye, except when silhouetted during a solar eclipse. This is the best time of the month to observe faint objects such as galaxies and star clusters because there is no moonlight to interfere.

Saturday, March 20th: March Equinox

The March equinox or Northward equinox is the equinox on the Earth when the subsolar point (the point at which the Sun is perceived to be directly overhead that is, where the sun’s rays strike the planet exactly perpendicular to its surface) appears to leave the Southern Hemisphere and cross the celestial equator, heading northward as seen from Earth.

March equinox is known as the vernal equinox in the Northern Hemisphere and as the autumnal equinox in the Southern. So, this is the first day of spring (vernal equinox) in the Northern Hemisphere and the first day of fall (autumnal equinox) in the Southern Hemisphere.

The Sun will shine directly on the equator and there will be nearly equal amounts of day and night throughout the world.


Sunday, March 28th: Full Moon

The full moon is the lunar phase when the Moon appears fully illuminated from Earth’s perspective. This takes place when Earth is located directly between the Sun and the Moon. More exactly, the ecliptic longitudes of the Sun and Moon differ by 180°). This means that the lunar hemisphere facing Earth – the near side –appears as a circular disk (being completely sunlit), while the far side is dark.

March full moon was known by early Native American tribes as the Full Worm Moon because this was the time of year when the ground would begin to soften and the earthworms would reappear. Other names for this full moon were Wind Moon, Little Grass moon, Sore-Eye Moon, Crow Moon, Sap Moon, Lenten Moon, Chaste Moon, Death Moon and Crust Moon.

Full Moon Names – A Complete List